How do i know how many volts my circuit needs?

Are there any active components in your circuit?

 

Maybe you should consider obtaining help from a more specialized forum, from people who understand guitars as well as electronics. Have you considered DIYstompboxes.com? Here is a thread on that forum that discusses the venerable Baxandall tone control circuit, both active as well as passive, in what appears to be knowledgeable detail. I saw nothing that indicated the "baxandall circuit requires a lot of power."

IMHO, your guitar electronics didn't put out anything because you wired it wrong.

 

Yes.

ak

 

Have you consulted any professional for you this query? My friend faced the same issue as he was also unable to decide the exact power his electronic guitar needed. To get the assured value he decided to consult the professionals [contact info removed by Mod] and also to know the other small details.