Questyle

The Sigma DAC/Amp Embodies Questyle's Endless Pursuit of Audio Excellence and Innovation

• AKM AK4493 DAC
• Features Questyle's TTA decoding architecture 
  
• Equipped with latest generation of Qualcomm Snapdragon technology
• Supports dedicated IEM mode

Sigma

Sigma was born from Questyle's uncompromising pursuit of excellence, featuring an innovative decoding architecture and supporting up to PCM768 and DSD512 decoding capabilities. The patented CMA technology combined with a fully-discrete, fully balanced design delivers professional-grade performance in a portable form factor. 

Retro-Inspired LED Accents

The Sigma features a precision-crafted chassis that embodies both aesthetic refinement and technical excellence. Its CNC-machined, ultra-fine sandblasted aerospace aluminum body is paired with custom optical-grade transparent glass, creating a striking visual contrast. Gradient dot-matrix detailing adds depth and sophistication, while the RF signal suppression coating ensures clean, stable performance.

Patented Current Mode Amplifier

Sigma incorporates four sets of patented, fully discrete, fully balanced CMA headphone/output amplifiers. Balancing size, power consumption, and sonic performance is the core challenge in portable audio devices. Questyle's patented Current Mode Amplifier achieves both powerful drive capability and refined sonic character. The fully discrete CMA delivers peak power up to >5W, peak current up to 3A, enabling exceptional dynamic drive capability. 

Desktop-Level Performance

To exceed customer expectations for decoding performance, Sigma uses the highly acclaimed AK4493 DAC from AKM. Additionally, it is engineered with Questyle's TTA architecture to deliver desktop-class audio performance. 

Just as only a pure black background reveals the richness of colors, only a sufficiently low noise floor allows the capture of sonic details, enabling true Hi-Fi audio. Sigma's high resolution grants it an ultra-low noise floor, achieving -130dB in Questyle's lab test environment. 

Comprehensive Compatibility

Sigma supports high-speed USB connections with smartphones and PCs, as well as lossless Bluetooth audio. Output modes can be switched between headphone amplifier and line-out for professional monitors or Hi-Fi systems. It can also enhance PC audio quality in settlings like live concerts. Questyle Lab conducted extensive compatibility testing, ensuring full compatibility with iOS, HarmonyOS, and Android 5.1+. For PC, it supports Windows 10 1803+ (driverless) and macOS. 

Apple MFi Certification

Sigma is officially MFi-certified by Apple, ensuring flawless compatibility with iPhone, iPad, and the broader Apple ecosystem. This certification reflects full compliance with Apple’s strict standards for power efficiency and external device performance, while safeguarding against potential risks posed by uncertified USB accessories. 

Qualcomm Snapdragon and LDAC Certification

Sigma integrates Qualcomm’s latest-generation Snapdragon Sound™ platform with Bluetooth 5.4, earning full certification for both Snapdragon Sound and Sony LDAC. Leveraging Qualcomm’s advanced aptX Adaptive technology, Snapdragon Sound enables support for aptX HD lossless audio, delivering CD-quality 16-bit/44.1kHz lossless streaming and high-resolution 24-bit/48kHz–96kHz audio over Bluetooth.

Additional Features

3.5mm + 4.4mm Outputs
Sigma features both 3.5mm SE and 4.4mm BAL outputs. Combined with manual gain selection and output mode settings, it perfectly drives sensitive IEMs, high-impedance headphones, and Hi-Fi audio systems. 

IEM Signal Processing Path
Sigma supports a dedicated IEM mode. In this mode, the signal path is minimized, and ultra-fine 64-step volume control is enabled. This ensures an optimal listening experience with sensitive in-ear monitors. 

Dual USB-C Ports
Dual USB-C ports allow the separation of data transfer and charging/power.

Professional-Grade Monitoring
Using a 3.5mm-to-RCA or 4.4mm-to-XLR balanced cable, music professionals can use Sigma anywhere as a high-quality interface. Connect mobile devices, PCs, or desktops to Hi-Fi equipment. 

Specifications

• USB Playback
  • PCM up to 768kHz/32bit
  • DSD Native: DSD64, DSD128, DSD256, DSD512
  • DSD Dop: DSD64, DSD128, DSD256
  • UAC 2.0 supported
  • Compatible with WinXP/Vista/Win7/Win8/Win10/Win11/
    Linux/Android/HarmonyOS/macOS and iOS
• Bluetooth Decoding: SBC / LE Audio / aptX / aptx HD/ LDAC
• Headphone Max. Output Power: >1200mW @32ohms balanced
• THD+N: 0.0002% @300ohms
• SNR: 120dB
• Playback Battery Life: 12hrs
• Max Charging Current: 2A
• Charging Time: -3.5hrs

In the Box

• Questyle Sigma DAC/Amp
• Type-C to C 12cm cable
• Type-C to C 120cm cable
• USB-A to Type-C adapter
• Warranty card + user manual
  

The QCC Dongle and Dongle Pro Are the First Lossless Bluetooth Transmitters with Apple MFi Certification, Enabling Effortless Plug-and-Play Lossless Wireless Audio From Your Apple Devices

• Lossless Bluetooth transmitter featuring Bluetooth 5.4
• Supports aptX, aptXHD, and aptXAdaptive codec technologies
• Equipped with latest generation of Qualcomm Snapdragon technology
• Dedicated app for unprecedented flexibility and customization
• Ideal for listening to music or gaming for an exceptional audio experience

QCC Dongle Pro

Due to Apple’s closed ecosystem and proprietary audio standards, its devices only support AAC and SBC codec formats, making them incompatible with Sony’s LDAC technology. As a result, when users attempt to connect LDAC-enabled devices to Apple products, the system cannot activate LDAC encoding, preventing access to the high-resolution audio LDAC provides.

As an official LDAC partner, Queshi Audio is dedicated to delivering a superior listening experience. The QCC Dongle Pro supports Sony’s LDAC at up to 990kbps, enabling near-lossless audio transmission and faithful reproduction of musical detail.

With plug-and-play simplicity, the QCC Dongle Pro allows users to connect directly to Apple devices—such as iPhone, iPad, or Mac—and pair with LDAC-compatible headphones or DACs to enjoy high-quality wireless sound with minimal setup.

Apple MFi Compatible

The QCC Dongle and QCC Dongle Pro are the world’s first lossless Bluetooth transmitters to receive official Apple MFi certification. This certification ensures seamless compatibility with iPhone, iPad, and the broader Apple ecosystem, meeting Apple’s strict standards for power efficiency, device safety, and system integration.

Unlike uncertified USB accessories, the QCC Dongle series minimizes the risk of device or system issues, delivering a safer, more reliable experience. Even as iOS updates roll out, both dongles maintain stable performance, offering users long-term peace of mind and effortless connectivity.

Qualcomm Snapdragon Certified

QCC Dongle & QCC Dongle Pro are equipped with Qualcomm's latest generation Snapdragon Sound™ technology. With the ultra-high transmission speed and stability of Bluetooth 5.4, it ensures lossless sound quality and extremely low latency. It supports aptX, aptXHD, and aptXAdaptive codec technologies to bring a high-quality audio experience.

Plug and Play

Questyle Audio Laboratory has optimized the QCC Dongle and QCC Dongle Pro for broad compatibility, addressing common issues like weak Bluetooth performance, unstable connections, and frequent dropouts. Whether you’re using a phone, tablet, or computer—on iOS, Android 5.1+, Windows, or macOS—the devices pair quickly and maintain a stable connection.

Recognizing that many laptops either lack Bluetooth or use outdated versions, Questyle has specifically enhanced performance for notebook users. The QCC Dongle series upgrades basic Bluetooth functionality from SBC to lossless transmission, dramatically improving wireless audio quality and convenience for both music and video. On Windows 10 (version 1803 and above) and macOS, no drivers are needed, just plug and play for a high-quality wireless experience.

Say Goodbye to Game Lag

The QCC Dongle and QCC Dongle Pro effectively overcome the Bluetooth audio limitations of the PS5 and Nintendo Switch, unlocking true wireless freedom for gamers. Since the PS5 does not natively support high-quality Bluetooth audio, achieving a seamless wireless experience has traditionally been difficult.

By supporting aptX Adaptive, QCC Dongle and QCC Dongle Pro deliver a low-latency, high-quality wireless connection that ensures precise audio-visual synchronization, letting you clearly hear every detail and react in real time. In addition to ultra-low latency, both dongles support high-definition voice transmission for headset microphones, enabling smooth, lag-free communication with teammates and enhancing your competitive edge online.

Specifications

QCC Dongle Pro

• Material: Vacuum plating/PC+ABS
• Bluetooth: 5.4
• Transmission Distance: ≥10m
• Audio Coding: SBC; aptX; aptX HD; aptX Adaptive; aptX Lossless; LDAC
• System Support: WinXP, Vista, Win7 8 10 11, Linux, Android, HarmonyOS, macOS, iOS
• Operating Frequency: 2.402GHz~2.480GHZ
• Power Supply: USB 5V
• Working Current: 37mA(48kHz/24bit, LDAC)
• Dimensions: 1" x 0.4" x 0.6"

QCC Dongle

• Material: Vacuum plating/PC+ABS
• Bluetooth: 5.4
• Transmission Distance: ≥10m
• Audio Coding: SBC; aptX; aptX HD; aptX Adaptive; aptX Lossless
• System Support: WinXP, Vista, Win7 8 10 11, Linux, Android, HarmonyOS, macOS, iOS
• Operating Frequency: 2.402GHz~2.480GHZ
• Power Supply: USB 5V
• Working Current: 33mA (48kHz/24bit, aptX Adaptive)
• Dimensions: 1" x 0.4" x 0.6"

In the Box

• Questyle QCC Dongle or Dongle Pro
• USB-A to Type-C adapter
• Warranty card
• Instructions

Questyle NHB15 Makes Lossless Listening Easy with your USB-C Device

• Included DAC cable provides high resolution audio with any USB-C device
• Compatible with any other DAC or amp with the included 3.5mm cable
• Custom Dynamic driver provides powerful bass and surprising clarity
• Patented Current Mode Technology provides ultra-efficient design that saves phone battery life and yields incredibly low distortion
• Check out Questyle's NHB12 for the Apple Lightning version

Experience True Lossless Sound

NHB15 is convenient to use: just plug and play without the need for any drivers or settings. Questyle NHB15 delivers studio-quality 192kHz audio with 0 distortion. It is a high-resolution audio powerhouse, capable of handling audio files up to 24-bit. This means you can enjoy studio-quality music on the go, with an astonishing 6.5 times more information than standard CDs.

Combining an integrated DAC and Current Mode Amplification, NHB15 provides unparalleled sound quality.

The USB-C based NHB15 improves the USB interface from its predecessor and is compatible with the entire iPhone 15 series, the latest iPads, Android, and Harmony OS. It's also fully compatible with Windows and Mac OS systems, allowing users to enjoy lossless music across a broad spectrum of smart devices.

SiP Chip for Independent DAC and AMP: MA2430

Questyle Technology, in collaboration with strategic partner USI, embarked on a two-year journey, starting in 2021, to develop of a series of chips in pursuit of an uncompromising auditory experience. The MA2430 incorporates Current Mode Amplification in the entire chain of lossless audio signal processing. Operating at a minimum voltage of 2V, the system requires only 3mA of operating current – half the power consumption of a typical TWS IEM.

However the MA2430 boasts the DAC capabilities for master tape-level music up to 192k and the performance of driving headphones with ultra low distortion at 0.00002%, challenging the physical limits of testing with top-tier audio analyzers.

Optimized Design

The balance between comfort and sound quality is crucial yet often overlooked when it comes to in-ear headphones. During the early stages of NHB15 development, designers collected extensive data from ear model databases. Using the data combined with real world testing, they achieved the ultimate design.

High Quality Accessories

Detachable Cable Design
The NHB15 features a detachable cable design. What's more, a classic 3.5mm cable is included in the box. The interchangeable cables can be paired with other devices.

Storage Pouch
The NHB15 comes with a specially designed headphone storage pouch that's compact and convenient to carry in your pocket on-the-go.

Specifications

• Driver: 10.2mm Dynamic with custom diaphragm voice coil
• Impedance: 38Ω
• Operating Current: 10mA
• Audio Decoding: 192k
• Ultra Low Distortion: 0.0002%
• Questyle 1 Year Warranty

In the Box

• NHB15 Earphones
• NHB15 USB-C DAC/Amp Cable
• 3.5mm Connector Cable
• Leather Storage Case
• Silicone Eartips: SS, S, M, L, LL
• Quick Start Guide

• Protect your Questyle M15i or M15C DAC with a soft yet rugged cover!
• Designed for MagSafe use
• Available in black

M18i Pushes the Limit of Ultra-Portable DAC Dongles with Both Bluetooth Capability and Lossless Decoding

• Dual flagship ES9219Q DACs
• Equipped with Bluetooth 5.4
• 3.5mm and 4.4mm outputs for versatile headphone compatibility
• Ultra-low noise floor of -130dB for a pure background and real sound
• Supports up to 384kHz (16/24/32-bit) PCM, delivering rich, high-fidelity audio
  
• Leather protective case available

Technology Without Boundaries

The M18i contains four sets of SiP modules that use Questyle’s patented Current
Mode Amplification, providing both powerful drive and delicate timbre. The M18i also features ESS’s flagship ES9219Q Combo DAC, a dual- DAC mono design, and a TTA (Three-Tier Architecture) DAC framework. Together, these provide performance equivalent to large desktop devices, while raising the bar for portable sound quality.

The Questyle M18i features wired USB and dual-mode lossless Bluetooth connectivity, powered by a 16-core XMOS316 USB platform for seamless compatibility with smartphones, PCs, and gaming consoles.

As the first M-series product with Qualcomm Snapdragon Sound, the M18i also introduces intelligent battery management, a high-definition OLED screen, and a microphone for clear voice calls. Offering exceptional Hi-Fi audio via Bluetooth or USB, the M18i delivers a premium listening experience.

Apple MFi Certified for Guaranteed Performance and Compatbility

The "i" in M15i indicates that it has been certified by Apple's MFi. MFi certification ensures perfect support for iPhone/iPad and seamless integration into the Apple ecosystem. It complies with Apple's stringent requirements for external devices in terms of power consumption and compatibility, avoiding the risk of damage to phones and systems from arbitrary device pairings.

Patented SiP Current Mode Amplifier

The Questyle M18i prioritizes resolving trade-offs between size, power efficiency, and audio performance in portable, battery-powered devices. It features two patented quad-core Current Mode Amplifier (CMA) SiP modules, delivering powerful drive with delicate timbre and achieving ultra-low distortion of 0.0002%.

By combining CMA technology with TOREX’s high-efficiency power management, the M18i ensures low power consumption without compromising performance, setting a new benchmark for the Questyle M series.

Sound Quality

A low noise floor is essential for capturing the intricate details of an audio track, allowing you to experience true high fidelity. The M18i excels in this regard, delivering exceptional accuracy with an ultra-low noise floor of -130dB, as verified in a controlled laboratory testing environment.

Full Compatibility for True Lossless Enjoyment

The M18i supports lossless Bluetooth and USB DAC dual-mode switching, making it convenient for users to choose freely. It is equipped with the latest generation of Qualcomm Snapdragon Sound technology and Bluetooth 5.4.

3.5mm and 4.4mm Dual Ports with Gain Adjustment

The M18i, equipped with (x4) current mode engines, supports 3.5mm single-ended and 4.4mm fully balanced output modes. It also features manual gain adjustment, allowing users to choose the gain mode according to personal preferences, headphone characteristics, or the audio system.

Management System

Mobile Mode

In Mobile Mode, the USB audio port is used exclusively for data transmission and does not draw power from the connected mobile device. The M18i operates entirely on its internal battery. Similarly, in Bluetooth Mode, the device relies solely on its battery for power, ensuring no external power source is required.

PC Mode

In PC Mode, the USB audio port serves a dual purpose: transmitting data and supplying power. It charges the M18i’s battery while simultaneously powering the system.

When connected to a USB host device with a current limit, the M18i intelligently manages power distribution. It prioritizes the system’s operation by ensuring stable performance, then dynamically adjusts the battery charging current based on the system’s workload and power availability. This ensures optimal performance without overloading the USB host.

Specifications

Appearance

• Material: CNC Anodized Aluminum Alloy
• Color: Black
• Size: 75mm x 35mm x 14.5mm

Bluetooth

• Version 5.4
• Supports: AAC, SBC, aptX, aptXHD, aptX adaptive, LDAC, LE Audio

Compatible Operating Systems

• Android phones and tablets: Android 5.0 and above
• PC: Win10 1803 and above
• Apple cellphone: iOS (You need to buy an OTG cable for Lightning to USB-C)
• Apple computer: Mac OS

DAC Capability

• PCM: PCM: 44.1kHz-384kHz (16/24/32bit)
• DSD: DSD64, DSD128, DSD256

Output Power

• 4.4mm: 28mW @ 300 ohms

Frequency Response & THD

• Frequency Response: ±0.1dB (20Hz-20kHz); ±2dB (20Hz-80kHz)
• THD+N: 0.0002%
• DAC: (2x) ESS ES9219Q

In the Box

• M18i Mobile Headphone Amplifier with DAC
• USB Type-C to Type-C Cable
• USB Type-C to Type-A Cable
• Warranty Card
• User Manual

M15i is the MFi Certified Update to Questyle's Beloved Ultra-portable Powerhouse

• M15i boasts near universal compatibility with any mobile device or computer
• 3.5mm and 4.4mm output with selectable gain, provides higher level of power for a wider range of headphones
• Can handle up to PCM768kHz/32bit and DSD512
• Optimizes power consumption to prevent premature phone battery drainage
• Ultra-low noise floor of -130dB for a pure background and real sound

Technology Without Boundaries

Questyle and ESS along with research teams in the United States, China, and Canada, maintain a continuous and fruitful collaboration to exceed customer expectations in mobile decoding headphone amplifiers. The M15i uses the updated ESS flagship USB DAC chip ES9281AC, supporting D/A converting up to PCM768 and DSD512 (1st Gen M15 supports up to PCM384 and DSD256). Audio distortion performance and output power have also been upgraded compared to the previous generation.

The original M15 was a best seller at Bloom and never actually experienced a slowdown in sales during its lifecycle. With the M15i, Questyle looks to expand its predecessor's popularity and bring and even higher tier of premium audio enjoyment in a portable form factor.

Hardcore Technological Aesthetics

The design of the Kunlun glass window coupled with the exquisite craftsmanship of the PCD, presents the critical elements of signal processing and technological aesthetics.

Apple MFi Certified for Guaranteed Performance and Compatbility

The "i" in M15i indicates that it has been certified by Apple's MFi. MFi certification ensures perfect support for iPhone/iPad and seamless integration into the Apple ecosystem. It complies with Apple's stringent requirements for external devices in terms of power consumption and compatibility, avoiding the risk of damage to phones and systems from arbitrary device pairings.

Patented SiP Current Mode Amplifier

The M15i contains two groundbreaking "current mode" patented amplification SiP modules developed by Questyle Technology. Overall, it totals four current mode amplification engines, delivering powerful and clear sound. Given that it operates in the current domain, the low impedance characteristics of the current-mode circuit result in a bandwidth of up to 1MHz and distortion as low as 0.0003%, capturing hidden details in songs.

As a result, the risk of overheating or interruptions during long listening sessions is extremely low thanks to the patented current mode amplification (TOREX precision power management technology) as well as the M15i's high performance and low power consumption.

Full Compatibility for True Lossless Enjoyment

During development, Questyle Labs conducted extensive testing and targeted optimization for M15i's compatibility with mainstream smartphones and tablets. Developers managed to achieve high compatibility with iOS, HarmonyOS, and Android versions 5.1 and above. As for PC, it supports Windows 10 18.3 and above (driver-free) as well as macOS. Hence, all HiFi headphone users can enjoy lossless audio on streaming platforms anytime, anywhere.

3.5mm and 4.4mm Dual Ports with Gain Adjustment

The M15i, equipped with (x4) current mode engines, supports 3.5mm single-ended and 4.4mm fully balanced output modes. It also features manual gain adjustment, allowing users to choose the gain mode according to personal preferences, headphone characteristics, or the audio system, rendering the M15i suitable for a wide range of apps and devices.

Dynamic Sampling Rate Display

When playing music, the data status indicator will light up.

• A single red indicator means PCM data with a sampling rate not exceeding 48kHz
• Dual red indicators represent high sampling rate PCM data or DSD audio data

Specifications

Appearance

• Material: CNC machined aluminum
• Color: Black
• Size: 61.9mm x 27.9mm x 12mm

Compatible Operating Systems

• Android phones and tablets: Android 5.0 and above
• PC: Win10 1803 and above
• Apple cellphone: iOS (You need to buy an OTG cable for Lightning to USB-C)
• Apple computer: Mac OS

DAC Capability

• PCM: PCM: 44.1kHz – 768kHz (16/24/32Bit)
• DSD: DSD64 (1Bit 2.8MHz), DSD128 (1Bit 5.6MHz), DSD256 (1Bit 11.2MHz), DSD512 (1Bit 22.4MHz)

Output Power

• 3.5mm:
• RL=300Ω | Po=11.97mW
• Vout (Max)=1.895Vrms
• 4.4mm:
• RL=300Ω | Po=22.6mW
• Vout (Max)=2.624Vrms

Frequency Response & THD

• Frequency Response: ±0.1dB (20Hz-20kHz) | ±2dB (20Hz-80kHz)
• THD+N: 0.0003%
• DAC: ESS flagship USB DAC chip ES9281AC

In the Box

• M15i Mobile Headphone Amplifier with DAC
• USB Type-C to Type-C Cable
• USB Type-C to Type-A Cable
• Warranty Card
• User Manual

The M15C Combines Four Current Mode Amplification SiP Modules, a Cirrus Flagship USB DAC, and Manual Gain Adjustment for a Compact and Versatile Design 

• M15C boasts near universal compatibility with any mobile device or computer
  
• Cirrus Logic Flagship CS43198 DAC chip
• Can handle up to PCM384kHz/32bit and DSD256
• Optimizes power consumption to prevent premature phone battery drainage
• 3.5mm and 4.4mm output with selectable gain, provides higher level of power for a wider range of headphones
• Leather protective case and leather MagSafe cover available

Audio Innovation

In a world of complexity, Questyle embraces simplicity. Their mission is to make high-fidelity audio accessible to every smartphone user, offering effortless access to lossless streaming anytime, anywhere. To meet the ever-growing demand for superior sound quality, they proudly introduce the M15C, their latest mobile DAC and headphone amplifier.

Continuing Questyle’s legacy of high-performance audio innovation, the M15C overcomes the technical challenges of smartphone audio circuits. Equipped with four independent Current Mode Amplification SiP modules, Cirrus Logic’s flagship USB DAC, and manual gain adjustment, this compact powerhouse delivers exceptional flexibility and performance.

Whether capturing the thunderous depth of a cathedral organ or the electrifying energy of a hard rock guitar, the M15C reveals even the finest details hidden within your favorite tracks, offering an unparalleled Hi-Fi experience on the go.

Take the M15C with you wherever life leads—and let it elevate your journey with extraordinary sound.

Comprehensive Compatibility

The Questyle M15C has been rigorously tested and optimized to ensure seamless compatibility with a wide range of devices, including iOS, HarmonyOS, Android 5.1 or above, macOS, and Windows 10 Version 18.3 or above. It’s completely driver-free, making setup effortless across all platforms.

Patented SiP Current Mode Amplifier

The M15C contains two groundbreaking "current mode" patented amplification SiP modules developed by Questyle Technology. Overall, it totals four current mode amplification engines, delivering powerful and clear sound. Given that it operates in the current domain, the low impedance characteristics of the current-mode circuit result in a bandwidth of up to 1MHz and distortion as low as 0.00028%, capturing hidden details in songs.

As a result, the risk of overheating or interruptions during long listening sessions is extremely low thanks to the patented current mode amplification (TOREX precision power management technology) as well as the M15C's high performance and low power consumption.

Full Compatibility for True Lossless Enjoyment

During development, Questyle Labs conducted extensive testing and targeted optimization for M15C's compatibility with mainstream smartphones and tablets. Developers managed to achieve high compatibility with iOS, HarmonyOS, and Android versions 5.1 and above. As for PC, it supports Windows 10 18.3 and above (driver-free) as well as macOS. Hence, all HiFi headphone users can enjoy lossless audio on streaming platforms anytime, anywhere.

3.5mm and 4.4mm Dual Ports with Gain Adjustment

The M15C, supports 3.5mm single-ended and 4.4mm fully balanced output modes. It also features manual gain adjustment, allowing users to choose the gain mode according to personal preferences, headphone characteristics, or the audio system, rendering the M15C suitable for a wide range of apps and devices.

Dynamic Sampling Rate Display

When playing music, the data status indicator will light up.

• A single red indicator means PCM data with a sampling rate not exceeding 48kHz
• Dual red indicators indicate high-resolution playback, including PCM audio up to 384kHz or DSD audio up to DSD256

Specifications

Appearance

• Material: CNC Anodized Aluminum Alloy
• Color: Silver
• Size: 61.9mm x 27.9mm x 12mm

Compatible Operating Systems

• Android phones and tablets: Android 5.1 and above
• PC: Win10 1803 and above
• Apple cellphone: iOS (You need to buy an OTG cable for Lightning to USB-C)
• Apple computer: Mac OS

DAC Capability

• PCM: PCM: 44.1kHz – 384kHz (16/24/32Bit)
• DSD: DSD64 (1Bit 2.8MHz), DSD128 (1Bit 5.6MHz), DSD256 (1Bit 11.2MHz)

Output Power

• 3.5mm:
• RL=300Ω | Po=10.72mW
• Vout (Max)=1.79Vrms
• 4.4mm:
• RL=300Ω | Po=42.79mW
• Vout (Max)=3.58Vrms

Frequency Response & THD

• Frequency Response: ±0.1dB (20Hz-20kHz) | ±1dB (20Hz-80kHz)
• THD+N: 0.00028%
• DAC: Cirrus Logic Flagship CS43198

In the Box

• M15C Mobile Headphone Amplifier with DAC
• USB Type-C to Type-C Cable
• USB Type-C to Type-A Cable
• Warranty Card
• User Manual

Questyle M12i Combines Sound, Aesthetics, and MFi Certification for an Affordable, Incredible Audio Experience

• Latest update to one of the best value DACs in the world
• Automatically detects impedance for improved performance with a variety of headphones
  
• Can handle up to PCM384kHz/32bit and DSD512
• Optimizes power consumption to prevent premature phone battery drainage
• USB-C input and 3.5mm headphone output

Mobile Headphone Amplifier with DAC

At the 2024 CES exhibition, Questyle unveiled its 2nd Generation popular mobile headphone amplifier with the DAC m12i.

Following the success of the 1st Generation M12, M12i also features high-performance audio signal processing. It breaks through the limitations of integrated audio circuits in phones in terms of technology, cost, and size. With Questyle's unique Current Mode Amplification paired with the ESS flagship USB DAC chip, it allows users to fully enjoy lossless audio content from streaming platforms with traditional HiFi headphones, ensuring the best audio experience.

Hardcore Technological Aesthetics

The design of the Kunlun glass window coupled with the exquisite craftsmanship of the PCD, presents the critical elements of signal processing and technological aesthetics.

Apple MFi Certified for Guaranteed Performance and Compatbility

The "i" in M12i indicates that it has been certified by Apple's MFi. MFi certification ensures perfect support for iPhone/iPad and seamless integration into the Apple ecosystem. It complies with Apple's stringent requirements for external devices in terms of power consumption and compatibility, avoiding the risk of damage to phones and systems from arbitrary device pairings.

Patented Low Power Consumption SiP Current Mode Amplifier

Questyle's exclusive patented "Current Mode" amplifier technology is the fundamental hardware that sets Questyle apart from other amps. As the engine of the headphone system, the amplifier has a crucial impact on sound quality. Thanks to the independently development CMA module, the M12i is not constrained by the power limitations of op-amps chips. It has ultra-low distortion of 0.0003% and extremely high current output capabilitiy. Thanks to the patented Current Mode amplification and the use of TOREX's efficient power management system, it features high-performance and low-power consumption. Hence, it lowers the risks of overheating or interruptions in the case of a long use.

Full Compatibility for True Lossless Enjoyment

During development, Questyle Labs conducted extensive testing and targeted optimization for M12i's compatibility with mainstream smartphones and tablets. It managed to achieve high compatibility with iOS, HarmonyOS, and Android versions 5.1 and above. As for PC apps, it supports Windows 10 and above, and macOS. As a result, HiFi headphone users can fully enjoy lossless audio content from streaming platforms anytime, anywhere.

Smart Impedance Matching

When headphones are plugged into M12i, the built-in smart impedance detection system automatically identifies the headphone impedance and adpats accordingly – much like an automatic transmission in a car. Upon detecting the insertion of headphones, M12i instantly activates working mode, recognizing and configuring the corresponding gain for the connected headphones. When the gain light is illuminated, a single indicator represents low gain, while dual red indicators represent high gain. If M12i is connected as a mobile DAC to HiFi systems, active speakers, etc. it will automatically switch to high-level output, providing sufficient support for HiFi audio systems.

Specifications

Compatible Operating Systems

• Android phones and tablets: Android 5.0 and above
• PC: Win10 1803 and above
• Apple cellphone: iOS (You need to buy an OTG cable for Lightning to USB-C)
• Apple computer: Mac OS

DAC Capability

• PCM: PCM: 44.1kHz – 384kHz (16/24/32Bit)
• DSD: DSD64(1Bit 2.8MHz) , DSD128(1Bit 5.6MHz), DSD256(1Bit 11.2MHz), DSD512(1Bit 22.4MHz)

Output Power

• RL=16Ω, Po=19mW
• RL=32Ω, Po=21mW
• RL=300Ω, Po=11.97mW
• Vout(Max)=1.895Vrms

Frequency Response & THD

• Frequency Response: ±0.1dB (20Hz-20kHz)
• THD+N: 0.0003%
• DAC: ESS flagship USB DAC chip ES9281AC

Appearance

• Material: CNC machined aluminum
• Color: Black
• Size: 61.8mm x 27.2mm x 12mm

In the Box

• M12i Mobile Headphone Amplifier with DAC
• USB Type-C to Type-C Cable
• USB Type-C to Type-A Cable
• Warranty Card
• User Manual

• Protect your Questyle M18i DAC with a soft yet rugged case!
• Available in black

• Protect your Questyle M15i or M15C DAC with a soft yet rugged case!
• Available in black

Protect Your CMA18 Portable DAC with a Genuine Questyle Leather Case

• Stylish black leather
• Custom fit for the CMA18 portable DAC
• Genuine Questyle 

Questyle CMA18 Brings Desktop Caliber Performance to Your Portable Collection

• Combines the best of Questyle's portables with their flagship desktop DAC and amplification tech
• Robust variety of functions, from an all-in-one portable to HiFi recording interface
• MFi Certified for max compatibility with iOS
• Up to PCM768kHz/32bit and DSD512 playback
• Striking visual design, and excellent build quality
• USB-C, Optical/TOSlink, and Bluetooth inputs (aptX-HD + LDAC), 3.5mm and 4.4mm headphone outs
• Genuine Questyle leather case available separately

Design and Craftsmanship

Introducing Questyle's CMA18 Portable DAC and Amp, primarily designed to create a Hi-Fi system for smartphones and laptops. It aims to achieve performance comparable to top-tier desktop setups within a portable form factor.

CMA18 Portable features sandblasted aviation-grade aluminum surfaces with silver high-gloss buttons and side panels, customer Corning glass on both front and back with gradient dot pattern, and an RF signal suppression coating giving the CMA18 a unique appearance while highlighting its hardcore performance. When in use, the internal amber-colored LEDs blend perfectly with the glass cover, highlighting the unparalleled design of the CMA18 Portable.

Performance

CMA18 Portable incorporates x4 sets of patented PCT-class current-mode SiP chips, each with a peak power of up to 5W and peak current of 2A, delivering robust driving power. Gain settings, coupled with high-energy current-mode amplifier technology, ensure powerful and flexible performance.

The latest XMOS XU316 platform combined with the AK4493 DAC chip supports HD D/A converting up to PCM768/DSD512. Four sets of self-developed current-mode pCT patented SiP chips, CC630/CA630, ensure the best power and lowest power consumption in the industry, couple with 4.4mm headphone output and high/low gain mode switching, unlocking the full potential of all IEMs and top-tier over-ear headphones.

Analog Input

The CMA18 Portable has two stereo line-in inputs: 3.5mm and 4.4mm. They can be connected to any audio equipment that has line-out analogy outputs, including turntable systems, pre-amps, mixing consoles, and more. Once connected the CMA18 Portable is capable of functioning as an external lossless, high-performance analog-to-digital interface for either of these inputs. It also allows the user to simultaneously monitor the input during the recording process via the 3.5mm or 4.4mm outputs.

Expandability

Given that high-resolution lossless streaming is accessible on smartphones and PCs, we have considered the needs of audiophiles, as well as those interested in recording and music production. The user-friendly interface and powerful performance of CMA18 Portable enable the CMA18 Portable to connect to 2-channel HiFi devices, bringing lossless music to your home. It also allows recording and music production professionals to connect to monitor speakers and mixing consoles on-site.

Specifications

USB Playback

• Max Support: PCM768kHz/32-bit
• DSD Native: DSD64, DSD128, DSD256, DSD512
• DSD DoP: DSD64, DSD128, DSD256
• Supports: UAC 2.0, Windows 7/8/10/11, Linux, Android, HarmonyOS, macOS, and iOS

USB Recording

• Fixed 48Hz/32bit Stereo Recording
• Supports: Windows 7/8/10/11, Linux, Android, HarmonyOS, macOS, and iOS

Inputs

• Digital
  • USB-C
  • Optical/TOSLink: Supports 44.1kHz, 48kHz, 88.2kHz, 96kHz, 192kHz/24bit
  • Bluetooth: SBC/AAC/aptX/aptX-HD/LDAC
• Analog
  • 3.5mm stereo line-in
  • 4.4mm Balanced stereo line-in

Amplification

• Maximum Headphone Output: BAL: 1000mW@32Ω
• THD+N: <0.0003%@20mW, 300Ω
• SNR: >120dB
• Headphone Outputs: 3.5mm and 4.4mm Balanced

Battery

• Playback battery life: >10 hours
• Maximum charging current: 2A
• Charging time: ~3.5 hour

In the Box

• CMA18 Portable DAC/Amp
• Charge cable
• USB-C to USB-C OTG Cable
• USB-C to Lightning OTG Cable
• Quickstart Guide
• Warranty Card

Questyle CMA Twelve Flagship Desktop DAC, Headphone Amp, and Pre-Amp Out

• Available in Standard or Master Edition (uses ceramic circuit boards and optimized components for higher performance level)
• Pure Class A amp with Balanced 4.4mm and XLR + 6.3mm headphone jacks
• Includes USB-B and SPDIF/Optical/AES/EBU inputs
• Delivers strong technical performance with valuable versatility

From Questyle

CMA Twelve, the new flagship DAC / Headphone Amp from Questyle inherits their classic desktop design format and outperforms its peers once again. It marks the anniversary of Questyle’s revolutionary Current Mode Amplification technology, invented 12 years ago.

Design

The elegant lines and laser etched text for status and volume echo the professional “genes” of the Questyle family. Serious thought for every detail is revealed with the amber glow of each LED indicator against the black sandblasted chassis.

Distinctive Questyle Design

Only when you see it will you truly understand the exquisite finish and design detail achieved between Questyle and their manufacturing partner, Foxconn, setting new benchmarks in technological standards. The chassis of the CMA Twelve has very high efficiency for heat dissipation, which ensures it will work with absolute stability in pure Class A, keeping the temperature at 45 degrees.

Resonance Control

Mechanical vibration will affect audio signal processing and the resulting sound. To avoid resonance, the CMA Twelve chassis is formed from 10mm-thick aircraft-grade Aluminum 6063, with high precision machining techniques of ±0.02mm.

Full Headphone Performance

CMA Twelve is designed with 4 groups of Current Mode amps, exhibiting forceful driving power and an ultra-low distortion level of a mere 0.0005%. And with the BIAS Control System, CMA Twelve will give full performance to your headphone or speaker systems while bringing an exceptional listening experience.

Additionally, CMA Twelve is Questyle’s first device to feature the now-common Balanced 4.4mm jack.

Studio Digital Monitoring

In addition to SPDIF and Optical inputs, the CMA Twelve supports a professional AES input and XLR output. Live recordings can be monitored in real time via the 6.3mm headphone output. Output level matching is user switchable between Studio and Standard mode. In the Studio mode, the power level will increase from 14dBu up to 20dBu instantly, matching it with studio-level professional equipment.

Sound Quality of Streaming

Digital audio signals from your PC, music server, CD or Blu-ray can be sent to the CMA Twelve via AES, SPDIF, Optical or USB. The core patented technologies of Current Mode Amplification, True DSD, and 3x Clock Asynchronous Transmission allow the CMA Twelve to offer outstanding performance from its DAC and pre-amp. The specially designed ADJ/FIX switch is used to match with power amps and active speakers.

Specifications

Device

• Finish: Black
• Chassis Materials: special CNC-tooled Aluminum
• Dimension: 13” x 7.87" x 1.38" (330mm x 200mm x 55mm)
• Working Status: Pure Class A
• Voltage: 100-120V or 220-240V, switchable
• Power Consumption: 17W

DAC+Headphone Amplifier Section

• Outputs
  • 4.4mm Balanced headphone
  • 4-pin XLR Balanced headphone
  • 6.3mm headphone
• Max Output Power
  • 247mW @ 300Ω | 900mW @ 32Ω(6.3mm)
  • 825mW @ 300Ω | 2W @ 32Ω (4.4mm and XLR)
• THD+N
  • 0.00070% @Po=100mW, 300Ω
  • 0.00167% @ Po=50mW, 32Ω
• Frequency Response
  • DC-20kHz(+0, -0.4dB)@0dBFS, 24Bit, 192kHz
  • DC-80kHz(+0, -3dB)@0dBFS, 24Bit, 192kHz
• SNR: 112dB, non-weighting

DAC + Pre-Amp Output Section

• USB-B Input
  • Supports 44.1kHz-384kHz/16Bit-32Bit PCM and DSD Native DSD64, DSD128, DSD256, as well as DSD64, DSD128, DSD256 of DoP format
  • Supports Win XP, Vista, Win7, Win8, Win10 and Mac OS
• Digital Input & Output
  • SPDIF input and output, Optical input, AES/EBU input
  • Support 44.1kHz-192kHz/16Bit-24Bit PCM
• Pre-Amp & DAC
• (x1) Pair BAL XLR | (x1) Pair UnBAL RCA
• STANDARD 14dBu: XLR: 5.084V | RCA: 2.549V
• STUDIO 20dBu: XLR: 8.887V | RCA: 4.475V
• THD+N@STUDIO 20dBu: XLR: minimum at 0.00085% | RCA: minimum at 0.00115%
• SNR: XLR: >112dB | RCA: > 109dB (non-weighting)
• Note: FIX/ADJ: Fixed Output Mode or Adjustable Output Mode of the pre-amp

Musicality and Accuracy Converge in the CMA Fifteen from Questyle

• The latest in Current Mode Amplification technology
• Upgraded power and connectivity
• Step into the latest tech with LDAC Bluetooth support, or go all analog and use the phono preamp function

Evolution never stops. We as humans have never stopped questing, and neither should a true flagship device. With an outstanding performance level, and all the ingredients for a new groundbreaking device, we present you our new Flagship DAC/Headphone Amp: The CMA Fifteen.

Commemorating the 15th anniversary of Questyle’s revolutionary Current Mode Amplification Technology.

At its core, Current Mode Amplification uses current, instead of voltage, to amplify audio signals. It is a state-of-the-art technology in audio amplification, leading to tremendous performance differences when compared to traditional audio amplifiers. As the “engine” of the audio system, Current Mode Amplification features a fully discrete and topological structure, and can achieve ultra-high sound performance that reproduces music so faithfully, it feels like you are in the original recording room. Using Current Mode Amplification technology, listeners can attain a much better listening experience, even when using consumer-grade headphones and speaker systems.

After 3 years of pre-research with ESS, Questyle selected the flagship DAC ES9038PRO, a decoding chip with the most powerful performance of any DAC invented to date, and jointly launched CMA Fifteen with ESS, supporting 32bit/768K and DSD 512 master band formats.

Current Mode Amplification Meets Current mode DAC=Current Mode²

To chase extreme performance, almost all high-end DAC chips from world-renowned manufacturers feature current-type output, which in most traditional amplifiers, is then coupled with an IV converter and classical amplifier architecture. But we at Questyle wondered: if the DAC’s output is already current-type, why don’t we also amplify that signal in current-mode? And that’s exactly what we did in the CMA Fifteen: we use the ES9038PRO current-mode DAC, and couple that to four Current Mode Amplifiers, which together operate in fully balanced mode to achieve “system-level lossless” purity.

CMA Fifteen supports MQA full decoding

MQA is an award-winning British technology that delivers the sound of the original master recording. The master MQA file is fully authenticated and is yet small enough to stream or download.

The CMA Fifteen includes MQA technology, which enables you to play back MQA audio files and streams, delivering the sound of the original master recording.

CMA Fifteen supports LDAC Bluetooth

As a global member of Sony, we equipped the CMA Fifteen with LDAC Bluetooth. LDAC™ is a new audio technology from Sony that allows you to enjoy high quality wireless audio via Bluetooth. With 3x data transmission rates as compared to traditional Bluetooth, LDAC provides an enhanced wireless listening experience for all your music.

Bring Apple music lossless work to your high-end audio system

The CMA Fifteen supports Apple Music Lossless. In addition to the classic USB Type-B input, the CMA Fifteen now also features a USB Type-C input to solve the wire conversion loss through cables. You can finally enjoy the new experience of high resolution lossless audio online, anytime, anywhere.

CMA Fifteen as a Preamp for your record player

CMA Fifteen now comes with analog inputs on the back of the unit. Connect CMA Fifteen to your record player as a preamp, you can enjoy the best possible sound quality. If you ever get tired of your digital music, the CMA Fifteen can now also take you back to the golden age of records.

Continuity and Inheritance

Questyle believes that the greatest products are born from the smallest details. The CMA Fifteen continues the classic design concept and perfect manufacturing technology of its previous lines of products, while further improving on all the details. Resonance, for example, is always a detail that could easily be ignored in the design process. However, mechanical vibration does indeed affect audio signal processing and the resulting sound. To avoid this resonance, the CMA Fifteen chassis is formed from 10mm-thick aircraft-grade Aluminum 6063, with precise machining tolerances of ±0.02mm.

Specifications

• AC Input: 100-120V / 220-230V (switchable)
• Power Consuming: <30W
• Size: 330*200*55mm (Jacks are not included.)
• Digital Input:
• USB x 2 (Including a high-priority USB Type-C interface and a USB Type-B interface.)
• PCM: 44.1khz-768kHz/32bit
• DSD: Native DSD 512; DOP DSD 256
• MQA: Full / Core decoder

USB input supports UAC 2.0. It supports Win XP, Vista, Win7, Win8, Win10, Linux, MAC OS and other operating systems. It also can be connected to smartphones supporting OTG audio output.

Note: Windows system under Win10 will need to install the ASIO driver developed by Questyle. Win10 system supports DOP DSD 256 without installing the driver, and supports Native DSD 512 with the driver installed.

• Optical Input x 1: PCM: 44.1kHz~192kHz/24bit
• Coaxial Input x 1: PCM: 44.1kHz~192kHz/24bit
• Bluetooth Input x 1: SBC, AAC, LDAC (At the highest level of 96kHz/24bit, 990kps/909kps)
• Analog Input: RCA x 1, 2Vrms standard level

Headphone Amplifier Output Interface:

• 6.35mm standard headphone jack x1
• 4-PIN balanced headphone jack x1
• 4.4mm balanced headphone jack x1

Note: You can set High/Standard bias through the BIAS switch on the front panel of the headphone amplifier, and set Standard/Low gain through the four Gain switches on the bottom of the headphone amplifier.

Pre-Amp Output Interface:

• XLR (x1)
• RCA(x1)

Note: The output level can be set by Standard/Studio switch and volume can be controlled by ADJ/FIX switch on the rear panel.

Pre-Amp Output Specs

• Max Analog Output Amplitude:
• RCA: 2V (Standard), Studio mode output up to14dBu
• XLR: 4V (Standard), Studio mode output up to 20dBu
• THD+N:
• RCA: 0.0004%
• XLR: 0.0003%
• Frequency Response: ±0.2dB (DC-22kHz)@48kHz/24bit)
• SNR:
• RCA: >116dB
• XLR: >119dB

Headphone Amplifier Output Specs

• Max Output Power：
• 6.35mm: 188mW @ 300Ω 1.5W @ 32Ω
• 4.4mm balanced / XLR 4-PIN balanced: 765mW @ 300Ω 2W @ 32Ω
• THD+N：
• <0.0003% @300Ω
• <0.001%@32Ω
• Frequency Response: ±0.2dB (DC-22kHz)@44.1kHz/24bit
• SNR：
• 6.35mm: >117dB
• 4.4mm balanced / XLR 4-PIN balanced: >120dB

Questyle's Newest, Refined Flagship Desktop DAC/Amp, the CMA Eighteen Master Edition

• Enhanced and optimized Questyle patented Current Mode Amplification technology
• Premium, military grade Rogers PCB material
• Upgraded XMOS XU316 USB platform supporting up to PCM768 / DSD512
• Upgraded Bluetooth mode supporting both aptX HD and LDAC

Crafting for Pursuit

Since the debut of the first CMA, each flagship in Questyle's series has shared the same soul: Current Mode Amplification Technology. The CMA Fifteen, released in 2020, featured the flagship ESS Current mode DAC for the first time. Coupled with Current Mode Amplification, it established the CMA series as a new era of full current processing, essentially "lossless throughout the entire chain."

The CMA Fifteen was almost perfect 3 years ago, but Questyle sought to improve it. Over the past 3 years, they have continually refined, explored and sought superior designs giving you their latest flagship: the CMA Eighteen Master.

The New Flagship: CMA Eighteen Master

The CMA Eighteen Master features the upgraded XMOS XU316 USB platform, supporting D/A conversion up to PCM768@32Bit / DSD512. It also supports both USB-B and USB-C interfaces, avoiding audio quality degradation issues associated with USB-C converters.

The CMA Eighteen Master's bluetooth mode has been upgraded to support both aptX-HD and LDAC, ensuring optimal wireless sound quality and connectivity.

Half Reverence, Half Praise

The CMA Eighteen Master embodies Questyle's pure design language, featuring a sandblasted matte CNC panel complemented by laser-engraved dark characters, mechanical toggle switches, and amber indicator lights, paying homage to the previous Gen CMA Fifteen.

Current Mode Amplification

This patented Questyle technology is a state-of-the-art audio amp design different from traditional amplification. As the "engine" of the audio system, Current Mode Amplification with fully discrete and topological structure, achieves ultra-high sound performance close to the original recording, yielding a much better listening experience with your premium headphones or speakers.

To dissipate the substantial heat generated by processing ultra-high-definition lossless audio data with the ES9039PRO, the PCB has been upgraded to Rogers material. Originally designed for military equipment, missiles, and specialized instruments, they are approximately 20 times the cost of ordinary materials.

Synchronized Performance Enhancement

The performance of the headphone amp and independent pre-amp have also been enhanced. The latest optimized Current Mode Amplifier, combined with a Rogers board with a dielectric constant only 1/10th of regular PCBs, shows a 30% improvement of performance in distortion tests compared to the previous generation. There is also a noticeable improvement in the dynamic range and background tranquility.

The headphone amplifier features a fully balanced architecture. Along with ALS quad analog potentiometers and peak current output capable of up to 3A, the CMA Eighteen Master will unleash the full potential of all high-end headphones.

Additionally, the digital power and Amp/DAC power are entirely independent, ensuring the purest signal processing. An independent NORATEL toroidal transformer and Schottky rectifier provide the cleanest power to the analog side of the DAC.

Specifications

Input/Output Interface

Digital Input

• USB
  • USB-C and USB-B
  • PCM: 44.1kHz-768kHz/32Bit
  • Native DSD: DSD64, DSD128, DSD256, DSD512
  • DoP DSD: DSD64, DSD128,DSD256
  • Supports UAC 2.0
  • Supports Win XP/Vista/7/8/10/11, Linux, Android, HarmonyOS, macOS and iOS
  • Note: Under Win10, will need to install Questyle's proprietary ASIO driver. Win10 system supports DOP DSD256 without driver, but supports Native DSD512 with driver installed
• Optical + COAX: Supports PCM 44.1 kHz~192kHz/24Bit
• Bluetooth: Supports BC, AAC, apt, aptx-HD, LDAC (up to 96kHz/24Bit, 990kps / 909kps)

Analog Input: RCA (std. level 2Vrms)

Headphone Amplifier Output

• 4.4mm BAL
• 4-pin BAL
• 6.3mm
• Note: High/Standard bias can be set via BIAS switch on front panel | STD/LOW Gain can be set via (x4) Gain switches on bottom of amp

Pre-Amp Output

• (x1) XLR
• (x1) RCA
• Note: output level can be set via STD/Studio switch | volume can be controlled by ADJ/FIX switch on rear

Headphone Amplifier

• Max Output Power
  • 6.3mm: 188mW@3000 | 1.5W@320
  • 4.4mm BAL / XLR 4-pin BAL: 765mW@3000 | 2W@320
• THD+N: < 0.0003%
• Frequency Response: ±0.2dB (DC-22kHz) @48kHz/24Bit
• SNR
  • 6.3mm: > 117dB
  • 4.4mm BAL / XLR 4-pin BAL: > 120dB

Pre-amplifier

• Maximum Analog Output Level
  • RCA: 2V (STD), Studio mode output increased to 14dBu
  • XLR: 4V (STD), Studio mode output increased to 20dBu
• THD+N: <0.0003%
• Frequency Response: ±0.2dB (DC-22kHz) @48kHz/24Bit
• SNR
  • RCA: >116dB
  • XLR: >119dB