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Old 29th October 2008, 09:05 PM   #1
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Default Preamp Stage L, R, L+R

Hi, what think about this preamplifier stage?

Click the image to open in full size.

I use the Silicon Chip preamplifier.
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The stage L+R is ok? can be improved?
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Im doing a 3.1 sound sistem.
Greetings
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Old 29th October 2008, 09:40 PM   #2
Nrik is offline Nrik  Denmark
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Project is approved.

...but don't you mean a 2.1 system?
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Old 30th October 2008, 06:17 AM   #3
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Hi, I forgot...
My sistem is 3.1

Left - Center (L+R) - Righ - Woofer (Active Filter Elektor)

the stage L+R, is not very simple that stage? or this so well?
Noise and interference on HF. How can I avoid them?

when I turn on dvd to hear music, I hear a faint hum in the Center Stage...

Greetings

PD:my English is not quite good
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Old 5th November 2008, 01:54 AM   #4
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What thinks about this preamp class A with IC (TL081)?
Based on this circuit this page:
http://www.users.otenet.gr/~athsam/class_a_amp_ic.htm

Is better than the SiliconCHip?

I have simulated in Multisim and obtained the following measurements:

Iq1,2 = 44.15mA => V(r7/r6) = 442,63mV
Voffset = 33.032mV

Can I adjust the offset?
Can be improved?
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File Type: jpg preamp class a - ic.jpg (31.0 KB, 150 views)
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Old 5th November 2008, 01:57 AM   #5
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Multisim.

I would appreciate your views.
Greetings
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File Type: jpg preamp class a - ic 2.jpg (97.9 KB, 131 views)
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