Quote:
Originally Posted by antonyfirst
What will I have to spend on amp to get a very very good sound out of the PK1s?
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Sure... my keys for budget PK1 synnergy
Take your basic CMOY...
Power it with two 9V cells, 470uFd, 25V caps wire them in series and virtual ground the node between the cells. Read the tangent page and the segment on virtual grounding. This is the same power scheme used in the $375 RA1, although the RA1 uses
tiny power caps.
Moderately high gain ~7-10, this will vary though depending on the output strength of your source.
Bypass the R5 resistor.
Skip any input filter capacitance if at all possible. This will vary depending on the OP amp and the DC output of your source. Always measure the DC offset of your amp though before plugging in your cans, just to play it safe.
Socket the OP amp and roll OP amps to taste. I like the OPA2107, but preferences can vary greatly. I'm still experimenting with OP amps myself, there are so many to choose from. I'd like the bass kick of the 2107, but with a more open / spacious sound. The 2107 sounds a little more closed in... IMHO.
Stay away from low bitrate MP3, the PK1 will punish those who don't
.