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albireo13 3rd August 2010 09:22 PM

amp selection?
I'm fascinated by the discussions here, especially regarding class A power amp designs. I'm thinking of building one ... 15-20watt/ch into about 8ohms. Which design would be a good reference to start with? I can look into tweaks and mods.


Melon Head 3rd August 2010 10:21 PM


vdi_nenna 6th August 2010 03:09 PM

The F5 is fantastic. The Mini Aleph is also good starting point. It can be scaled to your wattage requirement. has boards on sale right now. Looking to get some myself.

tmblack 6th August 2010 11:18 PM

I would start with a simple one like a BA-1 as a reference. Also depends on the speaker you are driving and your budget.

Bill Fuss 7th August 2010 01:08 PM

Aleph J is my favorite. It does depend on taste and listening habits. The F5 was not my cup of tea but it is a fine amp non the less.

Don't underestimate the heatsink requirements with any of the Class A designs.

albireo13 7th August 2010 01:32 PM

I've been doing searches on different suggestions and it takes awhile to wade through all the postings. Is there somewhere where schematics are posted of different designs?
That would be a great thing to have .. an archive of different design schematics.


Bill Fuss 7th August 2010 01:48 PM

Hi Rob,

In a perfect world it would be a great idea, but nowadays there are too many willing to steal someone's intellectual property for commercial gain. Stolen designs from Pass pop up on Ebay almost every day. You will have to continue reading the threads and give us more hints about what would suit you, and your preferences.

There is plenty of help available if you decide to jump in.

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