FS: XENOS 3HA portable amp
Sep 10, 2009 at 3:27 PM Thread Starter Post #1 of 6


Headphoneus Supremus
Sep 26, 2003
The Xenos 3HA headphone amp is out of production, but it remains quite a remarkable item. It has three dials: for volume, bass, and treble, allowing the listener to vary the tone for different tracks or sources. There are two mini plug outputs so two people an listen at the same time. The unit has received uniformly strong reviews from users and professionals for its sound quality and value.

ATP Systems Xenos 3HA Reviews

The 3HA works either with the included wall power cord or four AA batteries (not included).

Included in the package:
- Xenos 3HA headphone amp
- Xenos wall adapter
- Original padded box
- Bonus: RnB Audio "Sky Blue" cable, 8 inches long - beauty that looks as good as it sounds, generally thought to have a "refined" sound; perfect for the 3HA

The amp is in great shape, and works perfectly. $65 - PayPal is preferred. Includes priority shipment within the US. Read my feedback link, and feel free to send me a PM if you have any questions.

Power Sources
Batteries: 4 x 1.2V AA NiMH or 1.5V Alkaline
AC Adapter 100 - 240VAC input, 9VDC 1.5A regulated output

Maximum input signal level 6.7V 10.5Hz -“ 40kHz
Input type: 3.5mm stereo jack socket from headphone or line out
Input impedance (nominal) 20,000 ohm


Output power / channel - batteries: 485mW RMS (970mW Peak) into 32 ohm
Output power / channel - AC adapter: 755mW RMS (1505mW Peak) into 32 ohm
(Output power is per channel)
Output type: two 3.5mm stereo jack sockets for headphones
Dual headphones lowest impedance: 16 ohms each
Headphone impedance range: 16 ohm – 600 ohm

Audio Specifications
Frequency response:
10.5Hz – 40,000Hz -3dB +0.3dB

Distortion and noise: 0.01% +/-0.001% 30kHz BW 0dBV

Physical Dimensions
Inch / mm: 6.3L x 3.56[/size]
Jun 23, 2011 at 11:08 PM Post #5 of 6

Nuclear Man

New Head-Fier
Jun 23, 2011
 I would like to purchase your Zenos headphone amplifier.
This is my first time on this site and I only read my email in the evenings
as I can't get to it at work.

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