Collection of Class B topologies <100mA Idle and Sound closest by Class A - Page 4 - diyAudio
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Old 2nd May 2011, 11:54 PM   #31
ontoaba is offline ontoaba  Indonesia
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Yes it is a secret, because it using different way to handle loudspeaker than currently available. Too soon to be shared.

The buffer is simple but waste more power than SE classA, not suitable for direct loudspeaker driving. I am using power gain with only 11nS small signal lagging. The other fascinating is power amplifier cost without power supply only ~$30 with 200W output and sounds better than SEclassA. The other pity is I am not sell it here.
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Old 3rd May 2011, 01:02 PM   #32
ontoaba is offline ontoaba  Indonesia
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Try with this for starting (see pict). Add some diode, resistors and some elco. Then, give both that SE, secret buffer each. They will sounds good and will more sounds good after secret buffer given. And more sounds good if it has good damper. But sadly still not as real as real sound.
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Old 26th December 2011, 05:00 PM   #33
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I am still looking to Peavey's approach "low bias currents" (read post #25 and #26).
I have found this patent:
http://www.patentgenius.com/patent/6975172.html
http://www.pat2pdf.org/patents/pat6975172.pdf
but Peavey has earned more than 180 patents.

Last edited by tiefbassuebertr; 26th December 2011 at 05:03 PM.
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Old 26th December 2011, 06:09 PM   #34
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I have a simple MOSFET amplifier from me, which runs in class-ac. The amplifiers sound absolutely excellent I will improve the circuit and build something with bipolar.

Bemos - Eine verzerrungsarme Mosfetendstufe in class-B, Elektronik-Selbstbauprojekte - HIFI-FORUM
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Old 26th December 2011, 09:24 PM   #35
forr is offline forr  France
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Seems not to have been mentionned yet :

Audio Amplifier Circuit Design
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Old 30th December 2011, 06:28 PM   #36
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Quote:
Originally Posted by forr View Post
Seems not to have been mentionned yet :

Audio Amplifier Circuit Design
Yes.
there are follow thread arround this amp variant
MJR-7 Mosfet Amplifier of M. Renardson
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Old 30th December 2011, 06:34 PM   #37
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Quote:
Originally Posted by moschfet View Post
I have a simple MOSFET amplifier from me, which runs in class-ac. The amplifiers sound absolutely excellent I will improve the circuit and build something with bipolar.

Bemos - Eine verzerrungsarme Mosfetendstufe in class-B, Elektronik-Selbstbauprojekte - HIFI-FORUM
Interesting project. I would like to know the diagrams of the gate currents from the output MOSFETs in case of normal operating mode (sine wave and square wave) and in case of clipping - both from LTspice and in real live.

What about the sonic differences between the topologies about
Poweramp with IRFP4668
and
http://www.diyaudio.com/forums/solid...n-2sk1058.html

Last edited by tiefbassuebertr; 30th December 2011 at 06:40 PM.
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Old 27th July 2012, 08:04 AM   #38
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Who knows more about the sonic character from the topology about follow URL ??
ultimate Fidility amp with new VAS.(breaking barriers <10ma Standby current)
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