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-   -   Where do I put the subwoofer volume control potentiometer? (http://www.diyaudio.com/forums/analog-line-level/186854-where-do-i-put-subwoofer-volume-control-potentiometer.html)

TheLaw117 11th April 2011 06:42 PM

Where do I put the subwoofer volume control potentiometer?
 
Hi guys,

I'm building a 2.1 system. I'd like to have control over the power of the sub. Where do I put the pot? I have 2 boards that make up the sub portion. A preamp board and the actual power amp board. Do I put it even before the preamp board?

Thanks.

richie00boy 11th April 2011 06:50 PM

I would imagine that the pre-amp board provides the filtered signal for the sub, therefore if you want to adjust the sub level the pot must go after that.

TheLaw117 11th April 2011 07:03 PM

Here's the board: Subwoofer (12HZ-48HZ)+(28HZ-112HZ) preamplifier board | eBay

It seems like it has adjustable filters. Like a mixer...

So in between the preamp and the power amp? How do I know what value to use? 10K?

Thanks a lot.

richie00boy 11th April 2011 10:39 PM

I don't know how they do it... I couldn't even buy the parts for that price.

Yes 10k log should be ok, depends on the input impedance of your amp.

TheLaw117 12th April 2011 12:36 AM

Input is going to be my PC...So not sure what that means, but I'll go with 10K.

And yeah no idea how they can do that for roughly $15 w/ shipping. Its not even like they are buying/selling in crazy bulk either.

Thanks.


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