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Coupling caps, upgrade, similar values

Hi all,

One question I have with regards to changing or upgrading signal coupling caps in a preamp (or any amp in that matter). Replacing the cap with a capacitance value that is not identical to the original, but that of a similar value ... wouldn't this change the output impedance of the preamp, as well as bass roll off frequecy, sound etc, etc. Cos then you're actually changing two variables, brand and value ... so how can you make an accurate judgement of the difference in sound? eg. If the orignal coupling cap is a 5.0uf, and you change it to a 3.3uf or a 10.0uf ... what happens?

Sorry, but I'm all new to this. Thanks for your time.

Regards,
David
linnmaster

Showing 2 responses by linnmaster

linnmaster OP
45 posts
 
thanks for your response Magnumpi205

Would 5.5 to 3.3 be too far and end up changing the voice of the preamp? I think currently the cap in there is a MIT 5.0.
linnmaster OP
45 posts
 
Thanks for all the support.

I believe the cap is an output coupling cap as one end of it connected to the volume control.

I don't plan on re-engineering the circuit, and would like to keep it to the same value ... but some "really good" caps aren't available in specific values ... hence my question.

But I think I'm clear with what to do now ... will post another thread if something blows up :)
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