JDS C5D Amplifier DAC


JDS C5D. Powerful headphones amplifier and DAC. Reference quality portable digital-to-analog conversion for iPhone, iPad, Windows, Linux, and OS X. JDS C5D is built for portable users who demand maximum audio quality, exceptionally low noise, sufficient output power, and a super fine volume control to handle sensitive headphones and IEMs.

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JDS C5D is a high-performance portable headphone amplifier featuring digital volume control, multi-position bass boost, dual gain, and asynchronous digital-to-analog conversion compatible with iPod, iPhone, and all UAC1 compatible operating systems.


Perfect Channel Balance
Digital stepped attenuation with zero-crossing detection and 1dB attenuation steps provide smooth volume adjustment at all volume levels, even with sensitive IEMs.


Dual LDO Regulation
High performance audio starts with clean power. Supply rails are filtered by impressive TPS7A4700 and TPS7A3301 regulators to achieve ultra low supply noise at a constant output voltage of +/-7V.


Smart USB Charging
Powered by a large 1200mAh Li-Ion battery, JDS C5D quickly charges from any USB port (computer, tablet charger, cell phone charger, etc.). A single LED indicates battery status: solid green while on, blinking while battery is low, or blue while charging.


Configurable Sound
JDS C5D features dual gain levels and a multiple position bass boost toggle for highly customizable sound.


Low Jitter
JDS C5D’s asynchronous PCM5102A DAC operates with ultra low jitter, symmetrical pairs measuring below -112dB.


Low Output Impedance
JDS C5D’s extremely low output impedance of 0.62 ohms ensures natural frequency response with all headphones.


Amplifier Performance

Frequency Response: +/- 0.1 dB (20Hz-20kHz)

THD+N (20-20kHz, 150Ω) 0.0015%

THD+N (20-20kHz, 32Ω) 0.0045%

Noise: -105 dBu

Crosstalk @ 150 Ω -67 dB

Inter-channel Phase @ 1kHz +/- 0.01°

Channel Balance +/- 0.55 dB, all volume positions

Max Output @ 600Ω: 4.146 VRMS

Max Output @ 150Ω: 3.580 VRMS

Max Output @ 32Ω: 1.182 VRMS

Power Supply: 14.0 Vpp

Output Impedance: 0.62 Ω

Battery Run Time: 7-12 Hours

Charge Time: 2-4 Hours


DAC Performance

Frequency Response: +/- 0.14 dB

THD+N 100Hz: 0.0014%

THD+N 20Hz: 0.0015%

THD+N 10kHz: 0.0025%

IMD CCIF 19/20 Khz: 0.0015%

Noise A-Weighted: -103 dBu

Dynamic Range: >109 dB A-Weighted

Linearity Error -90 dBFS 24/96: 0.2 dB

Crosstalk -10dBFS: -80 dB

Sum of Jitter Components @ 11025Hz: -112 dB

Maximum Output Line Out 100K: 2.0 VRMS



Digital Stepped Attenuation:63 steps + mute

Dual Gain: 2.3x and 6.5x

Bass Boost: Off / Med / High

Low Battery Indication @ 20 Minutes

Thin Film Resistors: 0.1% Tolerance

Battery: 1200mAh, 3.7V Li-Ion


Data Support

Audio Formats: 16/44, 16/48, 16/88, 16/96, 24/44, 24/48, 24/96

Interface: USB, Audio Class 1

Native Driver OS Support: Windows XP & Later, OS X x86, Linux, iOS 7


DAC Compatibility

iPhone: YES – Requires CCK + iOS7

iPad: YES – Requires CCK

Windows: YES

Linux: YES

Android: Some – Requires OTG Cable + UAC1




Analog Input: 3.5mm

Digital Input: USB

Output: 3.5mm

Charging: USB



Case Dimensions (mm): 99.5 x 61.5 x 14.0

Weight: 119.07 gr. (4.2oz)


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