ATP Systems Xenos Audio X0HA-R Headphone Amplifiers

ATP Systems Xenos Audio X0HA-R Headphone Amplifiers 


- Xenos 0HA-R (X0HA-R) Mini Headphone Amp including user guide

  • 3ft 3.5mm stereo jack plug cord
  • 12VDC mini adapter for 115-120VAC use
  • 9V280mAH NiMH Battery


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    [May 24, 2006]
    Audio Enthusiast


    Very good sound
    Enough output to drive low efficiency phones
    Good looks/Packaging
    Has belt clip
    On-Off control on volume control knob
    Has built-in NiMH charger circuitry


    Short battery life
    Takes 12 hours to charge NiMH battery

    Of all the under 100 dollar portable headphone amps available from ebay, the Xenos X0HA-R is probably the best bang for the buck. It has decent looks, it's not like a lot of the headphone amps on ebay that look like they were built in somebody's garage. Good packaging helps make a good product even better, and so far only the ATP guys have figured this one out. The sound quality is very good, not the best I have ever heard, but better than most of the low cost portable amps I have tested. One of the big problems with most of the "Cmoy" or op-amp based headphone amps is that they run on a 9 volt battery. I don't have to tell you that 9 volt Alkaline batteries are not cheap, and heavy duty 9 volt batteries are pretty much useless on these type of amps, since they will last a few hours at best. The Xenos X0HA-R is designed to use an 8.4 Volt NiMH high capacity rechargeable battery that is slow charged so it can be used 500-1000 times. This is a big plus, since a NiMH battery will set you back only about 10 bucks. You can buy one from ATP when you buy the amp, and I recommend that you do, since these batteries are hard to get elsewhere. The charger can also be purchased from ATP, and I also recommend that, since the plug type needed to mate to the amp is not a standard size.

    Customer Service

    Good customer service
    Shipping is slow for USA customers since ATP systems is in Canada

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