"Pete" wrote in message
...
I am looking to build an amp for home theatre/hifi use.
currently have an amp using Hitachi's default design for mos
fets from the '80's ( 2sk49 2sj50 I think ). It is used with a
tagmclaren av32r and ipl acoustics tl4 speakers at the front
and Ariston ( small black tubular things that sound quite
good ) at the back.

I plan using LM4702 but have three options for the output
stage.

bipolar
SAP15P and SAP15N
2SA1943 and 2SC5200
mosfet
2SK1530 and 2SJ201

I know I'm inviting WW3 but would there be any differance in
sound between them ?

Pete





Why bother? The basic Hitachi design is as good as it gets. You
can improve things by building aproper regulated power supply for
it.

Mine, on Ambit boards, was dual mono with regulated PSUs designed
by John Lindsey Hood would do about 112W at the onset of limiting
into 8R and 224W at the onset of limiting into 4R. In 'normal'
use it barely got warm. It was as flat as a pancake (OK +/-
0.2dB) from about 12Hz to well over 100KHz, with maximum phase
error of about 2 deg at 12Hz and about 80KHz. Surely that's good
enough for anybody?


--
Woody

harrogate three at ntlworld dot com