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Old 24th February 2013, 04:25 PM   #1
400kg is offline 400kg  Turkey
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Default ultra performance amp

new design , no pcb
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Old 24th February 2013, 04:28 PM   #2
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But what does it sound like ?
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Old 24th February 2013, 04:29 PM   #3
400kg is offline 400kg  Turkey
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Quote:
Originally Posted by KatieandDad View Post
But what does it sound like ?
very detailed and soft
clear highs and deep bass.
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Old 24th February 2013, 07:48 PM   #4
400kg is offline 400kg  Turkey
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Default diagram corrected

diagram corrected
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Old 25th March 2013, 02:51 PM   #5
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Default final update

final update
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Old 25th March 2013, 03:12 PM   #6
sajti is offline sajti  Hungary
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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
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Old 25th March 2013, 05:23 PM   #7
400kg is offline 400kg  Turkey
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Hi Sajti
I took the Marantz sample
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Old 25th March 2013, 09:05 PM   #8
sajti is offline sajti  Hungary
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Quote:
Originally Posted by 400kg View Post
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
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Old 27th March 2013, 08:33 PM   #9
alex mm is offline alex mm  Europe
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Default PCB rev 1.0

...... Ok,right now ,you have PCB , and Q.C. need to check this layout , this is my contribution ......
Regards Alex.
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Last edited by alex mm; 27th March 2013 at 08:55 PM.
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Old 27th March 2013, 10:40 PM   #10
sbrads is offline sbrads  United Kingdom
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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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