power amplifier mosfet

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You can find link below with power amplifier (opamp at the input stage & complementary pair of MOSFETs at the output stage). Unfortunatelly, pages are in Polish. In the third link you can find a PCB layout. At the bottom you can find the specification of this amp. If you will be interested in, mail me and I try help you.
http://www.q-audio.pl/
http://q-audio.dis.pl/gallery/
http://www.audiostereo.pl/forum_wpisy.html?temat=5755&p=5#k

semiconductors: OPA552AP/IRFP240 (Farchild]/IRFP9240 (I.R.)/TL431
R+C: 7 + 10
PSU: +/- 28V,
gain: +41V/V
load: 4 Ohm
quiscent current:120mA
THD+N: 0.008% (22Hz to 22kHz, P =1 to 10W)
THD+N: 0.014% (22Hz to 22kHz, P = 11 to 40 W)
THD+N: 0.6% (22Hz to 22kHz, P = 41 to 75W)
SR: +22/-18V/us
 
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