JDS Labs EL Amp II+ Balanced Amplifiers Instruction Manual

OPERATING INSTRUCTIONS
AMPLIFIERS
EL AMP II+ BALANCED

SUPPORT

IL 62234 UNITED STATES

SECTION 1

QUICK SETUP

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STEP 01
Connect AC power adapter to rear power jack (16VAC), then connect to the wall outlet.| STEP 02
Connect a cable from your audio player to the RCA input jacks.
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STEP 03
Connect headphones to the front headphone output jack.| STEP 04
Press the power button on the rear side of the amplifier. Keep volume low until the music is playing.
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STEP 05
Slowly raise the volume knob to an appropriate listening level. See Listening Tips on page 5.|

SECTION 2

CONFIGURATION

Connectivity
EL AMP II+ Balanced accepts analog input via 1/4” TRS jacks.
RCA Line Output jacks are active while the amplifier is turned off, and automatically mute when the amplifier is turned on.

Setting Gain
Press the gain button to toggle between low or high gain amplification. 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
EL Amp II+ Balanced is DC coupled for maximum signal quality and requires an input source with < 4.5mV of DC offset 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 off and contact the manufacturer of your audio source to ensure DC offset is below 4mV.

Preamp-Output Functionality
EL Amp II+ Balanced provides headphone output and RCA Preamp Outputs. Hold the Power/ Mode button for at least 1 second to toggle between these modes. Only one mode is active at a time. Volume is adjustable in either mode.

HEADPHONE OUTPUT MODE

RCA OUTPUT MODE

Listening Tips
EL Amp II+ can amplify headphones to dangerously loud audio. Listen safely to conserve your hearing: www.hearingloss.org
To ensure an optimal noise floor, always position headphone amplifiers as far away as possible from wireless devices.

Operating Care

EL AMP II+ uses a high current power supply and runs warm to the touch. Avoid covering the top and sides.| EL AMP II+ can be safely powered on 24/7. For maximum relay lifespan, cycle power at least once per month.
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Do not lift the amplifier by knob, or turn the knob beyond its limits.| Use gentle force when inserting or removing cables.

Troubleshooting

The amplifier does not turn on
Cause: Missing or loose power adapter connection.
Solution: Firmly connect AC adapter to 16VAC power jack.

Internal LED flashes, then turns off
Cause: Wrong power adapter detected.
Solution: Please see the Power Adapters section below.

No sound in one channel
Cause: Bad cable, or incorrect computer settings.
Solution: Check balance settings; try another headphone or RCA cable. Some Mac OS X systems will pan audio to the Left channel upon initial connection of a DAC. The user must restore balance to the center.

No sound from the headphones
Cause: Wrong mode, incorrect connectivity, or incorrect setup
Solution: Please see the Connectivity page to toggle between Headphone or RCA Output. Check to cable.

Power Adapters
ATTENTION: Incorrect power adapters can result in capacitor explosion hazards and device damage. Only use the power adapter included with your Element:

**** Application for Council Directives 2004/108/EC, 2006/95/EC, 2002/95/ EC.Conformity declared for EN55022:2011, EN611000-3-2, EN61000-33, 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.

JDSLABS.COM

References

• JDS Labs - Makers of Element and Atom Headphone Amps + DACs
• Homepage - Hearing Loss Association of America

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