JDS Labs C5 Instruction Manual

C5 Headphone Amplifier

Feature

How to Use

Instructions Guide

General Use

Battery may require charging prior to first use. See next page.

1. Connect headphones to the Output jack.

2. Connect an audio player to the Source jack using a 3.5mm interconnect or Line Output Adapter cable.

To ensure proper startup, keep audio player off or paused before turning C5 on.

3. Turn the rear Power switch on.

4. Slowly raise volume to an appropriate level.

Volume Hold volume lever left to decrease volume, or right to increase volume.

Gain Push volume control to toggle high/low

Bass Boost Toggle Up for normal audio, Down for medium, Center for high bass boost

Equipment Care

 Use included rubber bumpers to avoid scratches.
 Always insert cables with care, and avoid cable strain to maximize audio jack life.

Listening Tips

 For maximum sound quality, use a line level source, or turn your audio player’s volume up very high

(75%+). Volume should always be controlled from the amplifier.

 You should hear no noise from C5 with your audio player disconnected. Every amplifier is tested to

ensure proper operation. If noise is present or audio is significantly distorted at all volumes, try a
different input cable.

 This amplifier can produce dangerously loud music. Be sensible and listen safely: www.hearingloss.org

Thank you for purchasing C5. If you have additional questions or comments, please contact us at:

[e-mail]

JDS Labs Model # C5 v1.01 | Instructions Rev. 6, December 2013 Pg. 1 of 2

Frequency Response

+/- 0.1 dB

Crosstalk @ 150 Ω

-67 dB

Max Output @ 600Ω

Max Output @ 150Ω

3.580 VRMS

Output Impedance

Battery Run Time

11-14 Hours*

Dimensions

99.5 x 61.5 x 14.0 mm

Low Battery

Flashing Green

Charging

C5 uses smart Li-Ion recharging technology, with typical charge time of 2-5
hours. Connect a mini-USB cable to any USB outlet to begin charging.

Amplifier may be used while charging, and USB cord may be
connected/disconnected as desired.

USB Noise: Some computers may impose noticeable ground loop noise while charging via USB and listening
from the computer's audio jack. To resolve excess noise, use an AC-to-USB (wall) power adapter for charging.

Amplifier LED Status

Off Off
On Solid Green

Charging Blue

Specifications and Operating Conditions

Amplifier Specifications

THD+N (20-20kHz, 150 Ω)
THD+N (20-20kHz, 32 Ω)
Noise

Inter-channel Phase @ 1kHz
Channel Balance

0.0015%

0.0045%

-105 dBu

+/- 0.01 degrees

+/- 0.55 dB

4.146 VRMS

Max Output @ 32 Ω
Power Supply

1.182 VRMS

14.0 Vpp

0.62 Ω

Charge Time
Operating Temp
Operating Humidity

Weight

Test equipment: PrismSound dScope Series III audio analyzer, Tektronix TDS1012 oscilloscope
*Run time and charge time observed under typical usage. Actual run time will vary with equipment and volume.

2-4 Hours

0°C to 60°C

0 to 85% Relative

4.2 ounces

ATTENTION: Battery must only be replaced with equivalent 3.7V, 1200mAh Li-Ion pack. Misuse of
the battery may cause fire or burns. JDS Labs, Inc. is not responsible for damages caused by
device misuse, or failure to adhere to device instructions.

FCC Certificatio ns
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial environment. This e quipment generates, uses, and can radia te radio frequency energy and, if not
installed and used in accordance with the i nstruction manual, may cause harmful interference to radio communications. Opera tion of this equipme nt in a resi dential area is likely to cause
harmful inte rference in which case the user will be required to correct the interferenc e at his own expense.

CE Mark Warning
This equipme nt complies with the requirements relating to electromagnet ic compatibility, EN 55022 class A for ITE, the essential protection requirement of Council Di rective 89/336/EEC on
the approximation of the laws of the Member States relating to electromagnetic compatibility.

JDS Labs Model # C5 v1.01 | Instructions Rev. 6, December 2013 Pg. 2 of 2