MYBEST5 Jfet CFP amplifier

Stee · 13th October 2012, 02:38 PM

another simple idea for natural sound

Boscoe · 13th October 2012, 03:13 PM

What makes this amp have natural sound?

Bensen · 13th October 2012, 09:07 PM

Isn't this VFB instead of CFB?

Have you heard amplifiers with this topo, in order to tell that this one is good sounding.

My next amp will very probably have a comparable topo.
See the circuit and FFT analysis.
==> FFT is done with 3V amplitude at the output

magnoman · 13th October 2012, 09:52 PM

I think he's referring to the output CFP (complementary feedback pair) transistor(s).

Thanks
-Antonio

Jay · 13th October 2012, 11:37 PM

What does it mean by "Best5"? Are there 4 other better CFP amps?

My best CFP is an SSA (Not very fast tho).

Bensen,

Can you show an FFT of your amp with 5m of simulation (.tran 5m) in Hann windowing?

Bensen · 11:23 AM

Hi Jay,

I always use the blackman, what specific information are you getting out of the Hann window?
See the attachement, again simulated with 0.1V input.

Greetz

Jay · 14th October 2012, 01:11 PM

Quote:

Originally Posted by Bensen

Hi Jay,
I always use the blackman, what specific information are you getting out of the Hann window?
See the attachement, again simulated with 0.1V input.
Greetz

Simulation is just simulation. What important is subjective performance and consistency between pictured performance and real life performance. If you can not differentiate 2 amps by looking at their FFTs, then showing FFTs has no meaning, right?

I think something is wrong with your circuit (may be from insufficient drive for the mosfet VAS). And there is also masking by noise floor.

But anyway, that's just my opinion.

Stee · 14th October 2012, 03:46 PM

but also the esclusive VLL system on VAS

Jay · 14th October 2012, 08:29 PM

Is it a VAS?

Stee · 15th October 2012, 02:04 PM

sure

13th October 2012, 03:13 PM	#2
Boscoe diyAudio Member Join Date: Feb 2010 Location: England	What makes this amp have natural sound? __________________ I thought about it once, but then thought again.

15th October 2012, 02:04 PM	#10
Stee diyAudio Member Join Date: Jul 2005 Location: milan	sure __________________ Please download my best audio idea http://www.esafono.it/ISY.zip

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13th October 2012, 09:52 PM	#4
magnoman diyAudio Member Join Date: Nov 2010 Location: The City, SanFrancisco	I think he's referring to the output CFP (complementary feedback pair) transistor(s). Thanks -Antonio

13th October 2012, 11:37 PM	#5
Jay diyAudio Member Join Date: Feb 2003 Location: Jakarta	What does it mean by "Best5"? Are there 4 other better CFP amps? My best CFP is an SSA (Not very fast tho). Bensen, Can you show an FFT of your amp with 5m of simulation (.tran 5m) in Hann windowing?

14th October 2012, 08:29 PM	#9
Jay diyAudio Member Join Date: Feb 2003 Location: Jakarta	Is it a VAS?