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Old 20th March 2007, 01:38 AM   #1
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Thumbs up A SAP15 based power amp

The schematic in PDF.
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Old 20th March 2007, 01:44 AM   #2
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Old 20th March 2007, 01:48 AM   #3
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Bridges and SAPs:
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Old 20th March 2007, 01:49 AM   #4
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Old 20th March 2007, 01:51 AM   #5
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Old 20th March 2007, 12:35 PM   #6
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. . . . nice, simple and clean Leolabs. What speakers are you using and how does it sound?
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Old 20th March 2007, 12:44 PM   #7
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Default Re: A SAP15 based power amp

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Originally posted by Leolabs
The schematic in PDF.
Looks very elegant.

Do you have measured results, or listening tests ?
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Old 21st March 2007, 01:49 AM   #8
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Thank you guys for interested.Even though it just stay at my place for not more than 2 weeks(as a my friend of mine ask me to help him build this amp),still quite impressive with it's performance.

First time set-up at my place:
-Source:a CDROM,a Zoran chipset based DVD player.That's all I have at this moment,planning to buy a H/K HD970 later.
-Speakers:KEF iQ1.

First impression was very powerful bass yet not overpowered,but lack of clarity/details,and not so good at voices(with CDROM direct in).Then swithed to the DVD player which output level is higher,it was a whole different story then.Clarity/details improved significantly and voices(tested with Norah Jones and Frank Miller).Listen to Aaron Copland's Fanfare for the Common Man was fun,wide soundstage,solid
bass.Guess that have to partner it with high output sources/preamps.

Later,my friend brought it to the local hi fi shop(and the people there was quite impressive with this DIY amp) to choose his speakers and finally got himself a pair of Yamaha NS525F instead a pair of Mission due to the $$$ problem,LOL!
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Old 23rd March 2007, 03:11 AM   #9
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Not much people interested in SAP15??????
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Old 23rd March 2007, 07:50 AM   #10
Ipanema is offline Ipanema  Malaysia
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Nice design. Is it a folded cascode front end?
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