Headphone Amp - Headphone amplifier Electro Harmonix - Free user manual and instructions

Product Type	Headphone Amplifier
Brand	Electro Harmonix
Model	Headphone Amp
Input Connector	1/4\" (6.35mm) Instrument Jack
Output Connector	1/4\" (6.35mm) Headphone Jack
Power Supply	9V Battery (6F22) or Optional 9V DC Adapter (center negative, 2.1mm)
Battery Life	Approximately 20 hours with standard alkaline battery
Controls	Volume Knob
Frequency Response	20 Hz – 20 kHz (±1 dB)
Total Harmonic Distortion (THD)	< 0.1%
Signal-to-Noise Ratio	> 95 dB
Maximum Output Power	100 mW into 32Ω
Dimensions (H x W x D)	4.9 x 2.7 x 1.2 inches (124 x 69 x 30 mm)
Weight	5.3 oz (150 g) without battery
Housing Material	Aluminum die-cast chassis
Color	Black with white graphics
Operating Temperature	32°F to 104°F (0°C to 40°C)
Storage Temperature	-4°F to 140°F (-20°C to 60°C)
Safety	Use only specified power supply. Do not expose to moisture. Avoid prolonged high volume to prevent hearing damage.
Cleaning	Wipe with a dry cloth. Do not use solvents or abrasives.
Repairability / Spare Parts	No user-serviceable parts. Contact Electro Harmonix or authorized service centers for repairs.

Frequently Asked Questions - Headphone Amp Electro Harmonix

How do I power the Electro Harmonix Headphone Amp?

The amplifier can be powered by a 9V battery (standard 6F22) inserted into the battery compartment, or by an optional 9V DC adapter with center negative polarity and 2.1mm plug.

Can I use this amplifier with both electric guitars and headphones?

Yes. The Headphone Amp is designed to be connected between your instrument and your headphones. Simply plug your guitar cable into the input jack and your headphones into the output jack.

What type of headphones should I use?

Any standard headphones with a 1/4" (6.35mm) plug will work. For best results, use headphones with an impedance between 32Ω and 300Ω. The amplifier provides enough power for most headphones.

How long does the battery last?

With a standard alkaline 9V battery, you can expect approximately 20 hours of continuous use. Actual battery life may vary depending on volume level and headphone impedance.

Does the Headphone Amp color the sound?

The Electro Harmonix Headphone Amp is designed to be transparent and neutral, providing a clean amplification without altering the original tone of your instrument.

Can I use this amplifier with a bass guitar?

Yes. The frequency response extends down to 20 Hz, making it suitable for bass guitars as well as standard electric guitars.

Is there an on/off switch?

No. The amplifier is powered on when a cable is plugged into the input jack and turns off when the cable is removed. This helps save battery life.

What should I do if the sound is distorted?

First, check the battery level. A low battery can cause distortion. Also, ensure the volume knob is not turned up too high. If the problem persists, try a different cable or headphones.

Can I use this amplifier with an MP3 player or smartphone?

Yes, you can connect a line-level source like an MP3 player to the input jack using a 1/4" to 3.5mm adapter. However, the amplifier is optimized for instrument-level signals and may require volume adjustment.

How do I clean the Headphone Amp?

Wipe the surface with a soft, dry cloth. Do not use any liquids, solvents, or abrasive cleaners. Avoid getting moisture into the jacks or battery compartment.

USER MANUAL Headphone Amp Electro Harmonix

Congratulations on your purchase of the Electro-Harmonix HEADPHONE AMP! Now you can rock out anywhere without disturbing your neighbors. Simply use a 9V battery and any pair of headphones you like, as long as they have an 1/8" plug attached to them.

—CONTROLS —

VOLUME — Sets the output level.

INPUT JACK – Connect the output of your instrument or effects pedal to this 1/4" jack. The input impedance presented at the INPUT jack is 100 kΩ.

OUTPUT JACK – Insert the 1/8" stereo plug from your headphones into this jack.

Power, from the internal 9-volt battery is activated by plugging into the output. The headphone cable should be removed when the unit is not in use to avoid running down the battery. A pop may occur in the headphones when inserting or removing the plug from the headphone jack.

To change the 9-volt battery, you must remove the 4 screws on the bottom of the HEADPHONE AMP. Once the screws are removed, you can take off the bottom plate and change the battery. Please do not touch the circuit board while the bottom plate is off or you may damage a component.

- WARRANTY INFORMATION -

Please register online at http://www.ehx.com/product-registration or complete and return the enclosed warranty card within 10 days of purchase. Electro-Harmonix will repair or replace, at its discretion, a product that fails to operate due to defects in materials or workmanship for a period of one year from date of purchase. This applies only to original purchasers who have bought their product from an authorized Electro-Harmonix retailer. Repaired or replaced units will then be warranted for the unexpired portion of the original warranty term.

If you should need to return your unit for service within the warranty period, please contact the appropriate office listed below. Customers outside the regions listed below, please contact EHX Customer Service for information on warranty repairs at [e-mail] or [phone]. USA and Canadian customers: please obtain a Return Authorization Number (RA#) from EHX Customer Service before returning your product. Include with your returned unit: a written description of the problem as well as your name, address, telephone number, e-mail address, and RA#; and a copy of your receipt clearly showing the purchase date.

United States & Canada

EHX CUSTOMER SERVICE

ELECTRO-HARMONIX

c/o NEW SENSOR CORP.

47-50 33RD STREET

LONG ISLAND CITY, NY 11101

Tel: [phone]

Email: [e-mail]

Europe

JOHN WILLIAMS

ELECTRO-HARMONIX UK

13 CWMDONKIN TERRACE

SWANSEA SA2 0RQ

UNITED KINGDOM

Tel: [phone]

Email: [e-mail]

This warranty gives a purchaser specific legal rights. A purchaser may have even greater rights depending upon the laws of the jurisdiction within which the product was purchased.

To hear demos on all EHX pedals visit us on the web at www.ehx.com

Email us at [e-mail]