Questyle Audio Technology C12 User Manual
CMA Twelve User Manual
Contents
About CMA Twelve
In the Box
Front View
Rear View
Bottom View
Remote Control
How to Match with CMA Twelve
PC System Requirements
Install CMA Twelve Driver on Windows OS
Core Audio Stream Introduction
Setup Core Audio Stream on JRiver Media Center
True DSD Technology
Setup DSD on JRiver Media Center
Install Foobar2000
Setup on Mac OS
Specifications
Cautions
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About CMA Twelve
Congratulations to you for being the owner of Questyle Audio CMA Twelve
DAC/Headphone Amplifier.
CMA Twelve is the new flagship DAC/Headphone Amplifier of Questyle Audio. It inherits
Questyle’s classic desktop design style and marks the anniversary of the revolutionary
Current Mode Amplification technology invented 12 years ago.
CMA Twelve adopts Questyle’s core patented technologies of Current Mode Amplification,
True DSD and 3X Clock Asynchronous Transmission, which allows the CMA Twelve to
have outstanding performance from its DAC and pre-amplifier. Together with the DAC
chip AK4490, CMA Twelve processes DSD signals without any PCM converting, providing
the original DSD signal processing. The pre-amp out is user switchable between Fixed
and Adjustable mode to match it with power amplifiers or active speakers.
CMA Twelve supports 4-PIN balanced output. It is designed with four groups of Current
Mode amplifiers，exhibiting forceful driving power and an ultra-low distortion level of a
mere 0.0005%. Plus the high-performance BIAS Control System, it will bring you an
exceptional listening experience. CMA Twelve is Questyle’s first device to feature the
4.4mm jack and Questyle is committed to continue with this trend.
In addition to S/PDIF, Optical and USB inputs, CMA Twelve supports professional
interfaces of AES and XLR that are used in professional recording studios, and the live
recordings can be monitored in real time via its 6.5mm headphone output. It is user
switchable between Studio and Standard mode. In the Studio mode, the power level will
change from 14dBu up to 20dBu instantly, matching it with studio-level professional
equipment.
To avoid resonance, CMA Twelve chassis is made of 10mm-thick aircraft-grade
Aluminum 6063 with high precision machining technique of 0.02mm. Especially the
“mutual-bit” structure, silicone material and pure aluminum help to reduce resonance to a
lowest level.
There are two versions of CMA Twelve, the first is the CMA Twelve Standard, the other
being the CMA Twelve Master. The CMA Twelve Master has a “MASTER” laser marking,
and it features the ROGERS Ceramic PCB and selected components to ensure the
ultimate performance on sound quality and specifications.
In the Box
CMA Twelve 1pc
Power Cord 1pc
Remote Control 1pc
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CMA Twelve User Manual 1pc
CMA Twelve Test Report 1pc
CMA Twelve Driver CD 1pc
Front View
① Power switch
② Power indicator: it flashes quickly with orange light to show the system is starting and
stays the orange light on to show the system has successfully started. It flashes slowly to
show the system is in mute. If the indicator flashes quickly with red light, it means the
system is in malfunction and you need to switch off the CMA Twelve, unplug your
headphone and restart the CMA Twelve. If the problem is not solved, please contact your
dealer or the After-Sales Support.
③ Source indicators: USB, OPT, S/PDIF, AES/EBU and 5G Wireless signals
④ Sample rate indicators
⑤ Source switch
⑥ Function switch between Headphone Amplifier and Pre-amplifier mode
⑦ Function indicators of Headphone Amplifier and Pre-amplifier (DAC) mode
⑧ BIAS Control switch
⑨ Indicators of High BIAS and Standard BIAS mode
⑩ Remote Control signal receiving zone
11 4.4mm balanced headphone output
12 6.35mm headphone output
13 4-PIN balanced headphone output
14 Volume control
Rear View
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① OPT input
② USB type B input
③ AES/EBU input
④ S/PDIF input
⑤ S/PDIF output
Pre⑥ -amp output switch between Studio and Standard mode
⑦ Pre-amp output volume switch between Fixed and Adjustable. When you switch it to
Fixed, the output will be at max level and the volume is unadjustable.
⑧ Pre-amp right channel balanced output
Pre⑨ -amp left channel unbalanced output
⑩ Pre-amp right channel unbalanced output
11 Pre-amp left channel balanced output
12 5G Wireless Pairing switch
13 Antenna housing. In order to get clear signals, please DO NOT use metal or other
shielding materials to cover this part.
14 220V/110V voltage switch (Please make sure the indicated voltage is in accordance
with the local voltage)
15 AC power supply
Bottom View
Headphone Amplifier Gain Control switch: the default setting is “Standard” mode. When
you use IEMs, please set it to “Low” mode. Make sure the four switches are at the same
mode setting.
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Remote Control
1. Mute
2. Source selection backward
3. Source selection forward
4. S/PDIF input signals
5. OPT input signals
6. Volume down
7. Volume up
Note: this is an all-in-one remote for Questyle products. When
you pair the remote with CMA Twelve, only some of the buttons
on the remote are available.
5
How to Match with CMA Twelve
1. Digital Input
CMA Twelve has OPT, S/PDIF, AES/EBU and USB inputs. Digital audio signals from your
PC, music server, CD or Blu-ray can be sent to CMA Twelve (CMA Twelve supports USB
Audio Class 2.0 standard driver). The core patented technologies of Current Mode
Amplification, True DSD and 3X Clock Asynchronous Transmission allow the CMA Twelve
to have outstanding performance from its DAC and pre-amplifier.
Note: you don’t have to install a USB driver if your music player is Linux system
supporting UAC 2.0.
2. Used as a DAC/Headphone Amplifier
CMA Twelve has a 6.35mm headphone jack, a 4-PIN balanced headphone jack and a
4.4mm balanced headphone jack. When you switch the “Function” to HP AMP
(Headphone Amplifier) mode, the CMA Twelve can be used as a DAC/Headphone
Amplifier and it will easily match with different headphones.
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Note:
① Headphone jacks on the front panel include a 6.35mm headphone jack, a 4-PIN
balanced headphone jack and a 4.4mm balanced headphone jack. You are NOT
allowed to plug in all of the three jacks at the same time. With the 4-PIN balanced
headphone jack plugged in, the other two jacks are NOT allowed to be used.
② CMA Twelve has DC output protection which will be enabled to cut off the output
automatically and protect your headphones if a malfunction or error is found.
③ CMA Twelve has Headphone Amplifier Gain Control switch. The default setting of the
Gain Control is “Standard” mode. When you use IEMs, please set it to “Low” mode.
3. Used as a Pre-amplifier
CMA Twelve can be used as a Pre-amplifier only and drive various active speakers.
● Switch the “Function” to DAC mode.
● When you switch the Pre-amp output to Standard mode, the max output level will be
14dBu. When you switch it to Studio mode, the max output level will be 20dBu.
● The Pre-amp output volume can be switched to Fixed or Adjustable. When you switch
it to Fixed, the output will be at max level and the volume is unadjustable.
chart：CMA Twelve+ Active Speaker
5GHz Wireless Mode
CMA Twelve can be matched with Questyle Super Hub SHB2. They will communicate with
each other via 5G Wireless transmission and bring you a wonderful music listening
experience.
chart：SHB2+CMA Twelve
● Switch the “Source” to 5G Wireless.
● Press and hold the Pairing switch and the 5G Wireless indicator will flash quickly, then
press the pairing button on the transmitter (SHB2). CMA Twelve and the transmitter are
successfully paired when the indicator stays light on. (Once the pairing is done, the 5G
Wireless will start working every time the 5G Wireless mode is on, so you don’t have to do
the pairing every time.) When the indicator is red, it indicates signals of high sample rate.
When it is orange light, it indicates signals of general sample rate.
● You can match the CMA Twelve with headphones, speakers or other output devices
depending on your needs.
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PC System Requirements
1) Operation System
CMA Twelve’s driver and hardware support Win XP/Vista/Win7/Win8/Win8.1/Win10. For
Apple Mac OS, later versions than the 10.5.7 are well matched without installing any driver.
2) Media Player
CMA Twelve is not limited to any special media player. Any PC compatible player (including
video players) is well matched.
3) File Format
File format is up to the media player on your PC. CMA Twelve can decode any file format
that the media player supports.
4) Requirements for PC Configuration
At least one USB port is required. An acceptable USB2.0 high-speed cable of type A-to-B
plug. We suggest using the high-quality USB cable to ensure the stability and reliability of
data transmission and guarantee the best performance of CMA Twelve.
Install CMA Twelve Driver on Windows OS
Your CMA Twelve can be recognized by PC after installing the CMA Twelve Driver on Windows
OS. We take Win7 64bit OS for an example to show the Driver installation.
1) Connect your CMA Twelve to its power supply and switch it on;
2) Connect your CMA Twelve to PC with a USB cable;
3) Put the provided CMA Twelve Driver disc into your PC and open the folder labeled “CMA
Twelve Driver/For Windows 7, 8, 8.1 and 10/” and then
double click “Setup.exe”.
4) Then follow the steps below:
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Click “Next”
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Click “Install” (Default install location is C drive)
Installation will take 3 or 5 minutes
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Installation is completed, click “Next”
Click “Finish” to exit the installation
5) Restart your PC and the CMA Twelve Driver is finished installation;
6) Installation on Win XP, Vista is similar to the above.
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