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Old 7th March 2012, 10:41 PM   #1
JoeDJ is offline JoeDJ  United States
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Default Stand alone channel balance control?

What is the best way to add some sort of balance control to a 2 channel stereo amp/system that does not have one?

I just want to be able to cut one channel or the other on ocasion and most times both channels wiil be at their max.
So, a seperate control for each channel would do it.

Last edited by JoeDJ; 7th March 2012 at 10:48 PM.
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Old 7th March 2012, 11:05 PM   #2
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Quote:
Originally Posted by JoeDJ View Post
What is the best way to add some sort of balance control to a 2 channel stereo amp/system that does not have one?

I just want to be able to cut one channel or the other on ocasion and most times both channels wiil be at their max.
So, a seperate control for each channel would do it.
A L pad attenuator for each channel would provide what you need. 50k each channel will give the volume range adjustment.

Cheers / Chris
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Old 7th March 2012, 11:10 PM   #3
JoeDJ is offline JoeDJ  United States
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Quote:
Originally Posted by Chris Daly View Post
A L pad attenuator for each channel would provide what you need. 50k each channel will give the volume range adjustment.

Cheers / Chris
I assume that would be on each channel's input..........
I happen to have two 8 ohm 50w L-pads on hand gathering dust.... would they work in the input of each channel?
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Old 7th March 2012, 11:28 PM   #4
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Hi JoeDJ

Yes I was referring to the input being attenuated, however The 8 ohm 50w Pads could be put to good use to provide the volume adjustment you require on the speakers rather than the input. Recycle Reuse Great !!

Cheers / Chris
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Old 7th March 2012, 11:32 PM   #5
JoeDJ is offline JoeDJ  United States
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These are the ones I have...
L-Pad 50W Mono 1" Shaft 8 Ohm 260-255
I would prefer to to put them on the input. Would that be OK?

Would the 8 ohm impedance efffect the input in any way?

Would a pot be better on the inputs?
What about this?
http://www.parts-express.com/pe/show...number=023-614

Last edited by JoeDJ; 8th March 2012 at 12:02 AM.
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Old 8th March 2012, 12:14 AM   #6
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Hi
No, will not work properly because input impedance/ output impedance at line level is quite different to that of the amplifier/ speaker output. The L pad you show, is a wire wound element that suits 8 ohm speaker use.

Best to get the part you need for the purpose required.
see: How to put fixed attenuation between preamp and amp. Lpad or just resistor in series?

Cheers / Chris
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