Class A high-end amp?

[lagoausente]

Has any body a Class A amp plan, mosfet, high-end. 25 W per chanel aprox.? I Woul like put at the input an 1 V line level? I think woul be a power amp (without preamp). Thanks.

 

[PassFan]

PASS DIY

Try www.passdiy.com
.
He has a few class a designs.

 

[mlloyd1]

There is also the Lang Class A amp from "Audio Electronics" (formerly known as "The Audio Amateur" when the project appeared. I think their web site still lists the PCB for sale. The TO3 metal case lateral Hitachi MOSFETs are no longer produced though. You could do a little surgery to use some of the TO3P or TO247 plastic package lateral MOSFETs from Hitachi or Toshiba.

mlloyd1

 

[Werner]

Hawk A18 kit?

It's a commercial kit, not a project. A PP 20W class AB amp (10W class A) without loop feedback.
I just had one in for review, and it is indeed a very sweet but powerful and solid performer.

http://www.audio.nl/speca18.html

An externally hosted image should be here but it was not working when we last tested it.

 

[Nelson Pass]

The upcoming Zen with an active current source
will reach those levels. Should be out in 3 weeks.

 

[filippo22]

class A amplifier

I found this URL

http://www.gmweb.btinternet.co.uk/index.htm#index

have you experience with these circuits?

ciao
Filippo
www.audiofanatic.it

 

[Geoff]

Filippo

It depends which one(s) you are interested in. There are a number of different Class-A designs on my website ranging from the Hiraga 'Le Monstre' at 4Wrms into 8ohm to Stan Curtis' 60W circuit. I haven't built them all, but can recommend the JLH Class-A which has been highly regarded for the past 30 years and is still generating very favourable comments from new constructors.

Geoff