Jump to content
Why become a member? ×

Wiring to switch active to passive


Rumble
 Share

Recommended Posts

I recently acquired a Pedulla thunderbolt 5 equipped with Bartolini soapbars and the TC4 preamp. From what I can gather the TC4 works like a tone control, but it seems to be suppressing the top end to the point where there almost isn't any.

It's been suggested I wire the bass to run passively but I'm not sure how to do this. Any tips would be gratefully received.

Thanks in advance.

Link to comment
Share on other sites

Thanks John. Sorry to be a bit dim, but should there be a physical switch somewhere on the preamp or does it require a change in the wiring?

I know some of the thunderbolt basses have a switch mounted with the controls on the front of the bass, but mine doesn't. Looking at the frequency distribution graphs my suspicion is that the bass is currently set up in the low boost mode because the low end is very good.

Thanks

Link to comment
Share on other sites

From what I've read on the net most users don't like the switch; I can probably understand why it mine is wired to be permanently engaged.

Which wiring diagram would I follow to get an unboosted signal?

Thanks for all your help.

Link to comment
Share on other sites

Perhaps users don't like the switch because - as shown in your link - that circuit only by-passes the signal from the preamp to straight out. It doesn't cut the power from the preamp so draining battery all the time the bass is plugged in, even though the signal is not even going through the amp.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...