[sdiy] [slightly-OT] Passive tone controls - coupling/biasing on input signal

[Donald Tillman]

> On Mar 9, 2015, at 10:30 AM, Justin Owen <juzowen at gmail.com> wrote:
> 
> Thanks guys - looks like DC thump/noise is going to be the deciding factor here so AC-coupled it is.
> 
> FYI - it was this article: http://www.duncanamps.com/technical/tonestack.html - that got me thinking about using a Baxandall on a guitar amp. While not the traditional solution - it seems like there might be some advantages if you're not trying to reproduce a particular Fender (or Vox or Marshall) tone - which I'm not.


I can tell you that these tone control circuits sound wildly different in use, far beyond what those frequency response plots imply, and you are very likely going to have preferences.  Since the core of each tone control circuit is only a handful of parts, it would be trivially easy to build a few variations and try them out.

The only guitar amplifiers with hi-fi style tone controls that come to mind are the classic Ampeg models.  And I'm guessing that those are tuned much closer together for more range and phase cancellation in the middle.

  -- Don

--
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com