View Poll Results: Would you be intersted in a USB amp as described?

26. You may not vote on this poll
  • No, not at all, you can put it where I think!

    3 11.54%
  • Only if it was really cheap, say $50

    10 38.46%
  • Only if it was cheap, about $100

    5 19.23%
  • This is the thing I was born for, send me one now!

    8 30.77%
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Results 131 to 135 of 135

Thread: Small and simple USB audio amp anyone?

  1. #131
    Constant Bitrate
    Join Date
    Feb 2006
    'Ok, anyone got semi decent instructions for this thing?'

    I assume 'this thing' is the USBAmp.

    'Why does sound come out the front/rear RCA out puts even when the amp is off?'

    The amplifier is turned on if 12 V DC supply is connected AND (there is a valid USB connection)
    OR (there is 12 V DC connected to the white wire).

    With a valid USB connection and sound streaming you get audio to these connectors (line level) because this part of the module is fed from the USB port.

    'What would the +12V out of the orange wire be used for?'

    You get + 12 V DC on this wire when the amplifier is turned on, you could light a bulb or, you could turn on a subwoofer amplifier or another audio amplifier to get even more audio power if the 4x40 is not enough...

    'What is the white "On/Off" wire? I though it was going to be a 12V switched (acc) but the amp powers up even with it disconnected?'

    As said earlier, this input can be used to turn the amplifier on when there is no USB connection, the front/rear RCA connectors can then be used as INPUTS for line level sound to drive the amplifier.

    'How do the faders work? They don't see to fade anything.'

    The faders can be used to increase or decrease the rear volume relative to the front volume, thus balancing the sound level in a car with front and rear speakers.

    'To say the documentation is poor is a real understatement. I would probably be better off if it came with none.

    To put this into prospective. I am an ex-sound engineer and now a computer systems analyst and I can't figure it out.'

    Some people send a mail with similar questions to Xtronic and then get these answers.


  2. #132
    Join Date
    Jan 2008
    Are there reviews available?

  3. #133
    Join Date
    Apr 2011
    Hi guys,

    Is the device still being produced? If so, how could I get it?

    Best regards,

  4. #134
    MySQL Error soundman98's Avatar
    Join Date
    Jan 2008
    on the border of northern IL/IN
    i believe it that xtronic is still selling it, though their site appears to be down right now..

  5. #135

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