JDS Labs ATOM AMP User manual

OPERATING INS T RUCTIONS | AMPLIFIER
ATOM AMP
SUPPOR T
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UNITED STATES

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SECTION 1
Q U ICK SET U P
STEP 0 1
Connect AC power adapter to
rear power jack , then connect
power adapter to wall outlet.
S T E P 0 2
Connect a cable from your audio
player to the RCA or 3.5mm Input jack.
Press the front INPUT button to select
3.5mm input, or depress to select RCA.
STEP 0 3
Connect headphones to the front
headphone output jack.
S T E P 0 4
Turn the volume knob clockwise to
power on.
STEP 0 5
Slowly raise the volume knob to an
appropriate listening level.
See listening tips on page 5

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SECTION 2
CONFIGURATION
CONNECTIVI T Y
ATOM AMP provides two inputs. Press the INPUT button to select 3.5mm, or depress for RCA.
RCA Preamp Outputs are only active while headphones are unplugged. Set the GAIN button
to low gain (depressed) when using RCA output. The volume knob adjusts RCA output.
Maximum RCA Analog Input Level (High Gain): 2.10 VRMS (+8.6 dBU)
Maximum RCA Analog Input Level (Low Gain): 8.65 VRMS (+20.1 dBu)
SETTING GAIN
Press the gain button to toggle between low or high gain amplication. Always use
the lowest gain necessary.
Switch to high gain only when you’re unable to achieve desired listening volume at
low gain.
SOURCE SAFETY
Atom Amp is DC coupled for maximum signal quality and requires an input source
with < 4.5mV of DC oset for safe operation. All JDS Labs DACs and consumer audio
sources are safe to use.
If you experience warm headphones, a loud pop when changing gain, or severe rustling
sounds while adjusting volume, immediately power o and contact the manfuacturer of
your audio source to ensure DC oset is below 4mV.

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PREAMP-OUTPUT FUNCTIONALI T Y
HEADPHONES CONNECTED
HEADPHONES DISCONNECTED
DAC
USB
INPUT
NOT USED
EXTERNAL
AUDIO
HEADPHONES
MUTE
RCA JACKS
(OUTPUT)
AUDIO TO
SPEAKERS
INPUT JACKS
(RCA or 3.5mm)
HEADPHONE
AMPLIFIER
AUDIO TO
HEADPHONES
RCA JACKS
(OUTPUT)
SPEAKERS
MUT E
DAC
USB
INPUT
NOT USED
EXTERNAL
AUDIO
INPUT JACKS
(RCA or 3.5mm)
HEADPHONE
AMPLIFIER
DAC
USB
INPUT
NOT USED
The volume knob adjusts RCA preamp output. Use Low Gain. Be sure to reduce volume level before connecting headphones!

JDSLABS . C O M 5
LISTENING TIPS
OPERA T I NG CARE
Listen safely to conserve your hearing:
www.hearingloss.org
Atom Amp uses a high current, linear
power supply design and runs warm
to the touch.
To ensure an optimal noise oor,
always position audio equipment as far
away as possible from wireless devices.
Atom Amp can be safely powered on
24/7.
Do not turn knob beyond its limits or
press buttons with excessive force.
Use gentle force when inserting or
removing cables.

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T R OUBLESH O O TING
Amplier does not turn on
Cause: Disconnected, damaged, or incorrect power adapter
Solution: Please ensure AC adapter is rmly connected to power jack and wall outlet
Amplier does not turn o
Cause: On rare occasion, mechanical relays can stick
Solution: Tap or knock top of enclosure with moderate force to disengage
No sound, but light is on
Cause: Wrong input mode selected, or cable/source problem.
Solution: Input button must be depressed for RCA input, or pressed for 3.5mm input.
Audio plays in only one channel
Cause: Bad cable or adapter, or incorrect source setup
Solution: Try another input cable, and headphones with a native 1/4" connector.
For more help, please visit: www.jdslabs.com/troubleshooting
POWE R ADAPTER S
ATTENTION: Incorrect power adapters can result in capacitor
explosion hazards and device damage. Only use the power
adapter included with your ATOM AMP:
Type: AC-to-AC Transformer Output Voltage: 15 or 16 VAC
Current: 500mA Minimum Connector: 2.1x5.5mm (ID x OD)

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Application for Council Directives 2004/108/EC, 2006/95/EC, 2002/95/
EC.Conformity declared for EN55022:2011, EN611000-3-2, EN61000-3-
3, EN55024-2
This equipment has been tested and found to
comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules.