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-   -   ultra performance amp (http://www.diyaudio.com/forums/solid-state/230766-ultra-performance-amp.html)

400kg 24th February 2013 04:25 PM

ultra performance amp
 
3 Attachment(s)
new design , no pcb

KatieandDad 24th February 2013 04:28 PM

But what does it sound like ?

400kg 24th February 2013 04:29 PM

Quote:

Originally Posted by KatieandDad (Post 3384211)
But what does it sound like ?

very detailed and soft
clear highs and deep bass.

400kg 24th February 2013 07:48 PM

diagram corrected
 
1 Attachment(s)
diagram corrected

400kg 25th March 2013 02:51 PM

final update
 
1 Attachment(s)
final update

sajti 25th March 2013 03:12 PM

1 Attachment(s)
Hi,

the input & tha VAS looks like the Pioneer A9 power stage. So it can be quite OK.
Some improvement possible in the VAS. See the attached picture.

Sajti

400kg 25th March 2013 05:23 PM

Hi Sajti
I took the Marantz sample

sajti 25th March 2013 09:05 PM

Quote:

Originally Posted by 400kg (Post 3426854)
Hi Sajti
I took the Marantz sample

OK. My experience, that it sound even better if You connect the LEd to the emitter of Q621. In this case the impulse response is much better too.

Sajti

alex mm 27th March 2013 08:33 PM

PCB rev 1.0
 
2 Attachment(s)
...... Ok,right now ,you have PCB , and Q.C. need to check this layout , this is my contribution ......:)
Regards Alex.

sbrads 27th March 2013 10:40 PM

Isn't the DC gain a bit high? And no input cap. I melted a speaker cone once with something like this.


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