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Old 24th September 2004, 02:16 PM   #1
foxyb is offline foxyb  United Kingdom
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Default jlh 80W

Has anyone got any upgrade recommendations on the john linsley hood 80W MOSFET amplifier, currently sold by Williams Hart as their diy model?

I currently own the stereo version with power supply upgraded to a single high power transformer, elna cerafines, fast but soft recovery diodes and pass regulator mosfets upgraded to SJ56, SK176. I have an ALPS black beauty pot, and Mcap feedback capacitors and panasonic hfz caps on the power amp board.

In particular, is there an upgrade path to widen the soundstage? I listened to a friends ageing pioneer, shocked to find it had a wider soundstage.

Also, one channel seems about 10% louder than the other. Is this a fault, or should I just adjust the pot on that channel.

I would appreciate any comments.

Regards to yuse all.
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Old 25th September 2004, 11:00 AM   #2
MikeB is offline MikeB  Germany
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Have you listened to the pioneer instead of jlh, means you took the
pioneer to your home and replaced temporarily the jlh ?
That's the only way to compare amps as roomacoustics and speakers
have a big impact on the sound...

Mike
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Old 27th September 2004, 07:13 AM   #3
foxyb is offline foxyb  United Kingdom
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I plugged in my friend's A400 in the same room, same speakers etc. It is always a little disappointing to have a mass-produced amplifier have a wider soundstage than your own amp!
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Old 27th September 2004, 09:24 AM   #4
MikeB is offline MikeB  Germany
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Yes, that's annyoing...
Maybe the JLH is not able to drive your speakers ?
I am not sure, maybe you should consider an amp with fast BJTs ?

Mike
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