Anyone have a Raven Labs PHA-1 portable amp? I have some questions...
Aug 22, 2010 at 11:35 PM Thread Starter Post #1 of 3

placeboe

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Finally found one of these (they're real hard to find).  Bought to be able to play bass / while listen to .mp3 via HD650's.  Built like the proverbial tank and everything works fine EXCEPT the Mix-In.
 
With the source audio component nearly maxxed out on volume, you can hear it ever so slightly thru the phones.  The Mix L&R seem to have no effect on this level, although switching from mono to stereo on the Mix-In - I can hear the switching.  Originally, I thought it may be phase cancelling - but have since tried many cable combinations and sources with no difference.
 
Anyone on head-fi have one of these amps that may know what the problem could be (or who might have a schematic)?  Is there a special cable that has to be used for the Mix-In input?
 
Thanks,
 
placeboe  (see photos below)
 

 

 

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