Baxandall active tone control

jenks · 16th April 2008, 10:01 AM

Does anybody out there understand (and is able to explain!) how the all of the components in the baxandall circuit I've attached work to modify the frequency response of the input signal?

I imported this circuit into multisim and added a 'middle' cut and boost control that I came across here...

http://www.headwize.com/projects/sho...=equal_prj.htm

The output looks really nice and I'm planning on building the circuit. I just want to really understand how it works. I know a bit about laplace, fourier, transfer functions etc so if anybody out there can explain how each component serves to affect the frequency response of the input signal then please do!

Cheers, Jenks.

jenks · 16th April 2008, 10:09 AM

Baxandall circuit that I took my bass and treble controls from.

sreten · 16th April 2008, 11:14 AM

http://www.schmarder.com/radios/tech/tone.htm

/sreten.

cfcubed · 18th April 2008, 09:18 PM

The info above really answers you question(s) I think, but thought I'd share my own tone excursions.

Wanting to add some degree of tone control to a couple headamps I built, dove into two attempts:

BCJ tube amp with Bass n Treble and Fender Tone Stack B M T but not incorporated into those particular amps.

I made them switchable & eventually found myself not using them much. Issues may have been impedance and I my passive implementation.

Finding I often moved Bass & Treble in opposing directions when I did use them at all, tried making a portable Tilt EQ which I'm liking best. Perhaps because its not passive (zero gain). Only real change I would make would be to a 20k pot (like panny mentioned in thread) cause I'm using little of the range.

Just some thoughts... Have fun,
Chris

16th April 2008, 11:14 AM	#3
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	http://www.schmarder.com/radios/tech/tone.htm /sreten. __________________ There is nothing so practical as a really good theory - Ludwig Boltzmann When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Active filter/Tone control	Amagic	Parts	5	20th July 2007 06:57 PM
How can I integrate a Baxandall Tone Control	roger-k	Solid State	9	16th July 2007 10:33 AM
baxandall tone control	9am53	Tubes / Valves	16	16th March 2005 06:44 PM
3-Ch LM3875 w/ Tone Control and Active Crossover	StalfoS	Chip Amps	6	11th January 2005 12:54 AM
Baxandall Tone Control	zee	Parts	3	22nd December 2004 01:11 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

18th April 2008, 09:18 PM	#4
cfcubed diyAudio Member Join Date: Jul 2007	The info above really answers you question(s) I think, but thought I'd share my own tone excursions. Wanting to add some degree of tone control to a couple headamps I built, dove into two attempts: BCJ tube amp with Bass n Treble and Fender Tone Stack B M T but not incorporated into those particular amps. I made them switchable & eventually found myself not using them much. Issues may have been impedance and I my passive implementation. Finding I often moved Bass & Treble in opposing directions when I did use them at all, tried making a portable Tilt EQ which I'm liking best. Perhaps because its not passive (zero gain). Only real change I would make would be to a 20k pot (like panny mentioned in thread) cause I'm using little of the range. Just some thoughts... Have fun, Chris