Looking for Very good tone control schem.

vytas · 9th October 2003, 09:51 AM

Hello for everyone!

Please help my to find audio tone control schematics. I looking for very good (High End) solutions. I think it shuold be pasive system and it shuold regulate +-5dB for high and low bands.

I expect you understan what I mean, (I am about my English)

EchoWars · 11th October 2003, 12:11 PM

How about this: http://www.angelfire.com/electronic/.../Amp-Tone.html
Passive setup...

If active is a considration, search for "Baxendall tone control" on the web...

EchoWars · 11th October 2003, 12:20 PM

Interesting. Found passive versions of the Baxandall filters...shows you what I know about filters....little...

http://headwize2.powerpill.org/proje...=equal_prj.htm

mlloyd1 · 11th October 2003, 05:36 PM

I know you said "passive". However, I'd urge you to consider the active, "baxendall-like" tone control design featured in the Apt preamp from some years ago. I posted the relevant parts of the schematic some time ago (a search should find it here and a patent search should find it elsewhere - it was patented. I'd post it again but my stuff is all packed up). A key point was that it added a unity gain buffer to minimize interaction in mid band. The buffer also made the math easier - when I was younger, I liked deriving the equations for all kinds of filters and comparing the results to various simulators we used to play with. I liked the Apt preamp for it's day and I built versions of the tone control for some of my earlier preamps which are still serving friends well.

Of course, now I don't use tone controls at all, but that's another story for another day.

mlloyd1

Cobra2 · 11th October 2003, 07:33 PM

here: http://www.zero-distortion.com/views/glavna.htm

Arne K

mrfeedback · 12th October 2003, 06:55 PM

Quad preamp tone controls are different and useful.

Eric.

vytas · 13th October 2003, 08:10 AM

Good morning,
Thank you very much, for replay, I found some interesting things in EchWars sugestions, I shall try to implement some ideas. I understand Mlloyd1’s idea, at this moment I use two amps without tone control, and I bild one more High quality amp, in this one I wish to instal t.c. I worked about ½ year with Baxendall solution, read many articles, tried active t.c. used “tonestack” soft for calculations, used different loads…. And spend many $…
One more question: I had never tried Quad amps and preamps, are they good or just medium quality?

Thank you for replay... and greetings from Lithuania

Jan Dupont · 13th October 2003, 05:39 PM

I think you will chatagorise the QUAD preamps as "medium" quality, however I'm very please with my modified 34 preamp.

And I very fond of QUAD's "Tilt-circuit" for tone control (that is if you want or need tone controls at all.......)

dimitri · 14th October 2003, 06:42 PM

May I recommand you Williamson Audio preamp, EW+WW, Dec., 1993, pp.1012-1013

Nelson Pass · 14th October 2003, 09:43 PM

It will amuse you to consider that Tom Holman got
his chops patenting a tone control circuit, which I
can recommend.

9th October 2003, 09:51 AM	#1
vytas diyAudio Member Join Date: Oct 2003 Location: Vilnius	Looking for Very good tone control schem. Hello for everyone! Please help my to find audio tone control schematics. I looking for very good (High End) solutions. I think it shuold be pasive system and it shuold regulate +-5dB for high and low bands. I expect you understan what I mean, (I am about my English)

11th October 2003, 07:33 PM	#5
Cobra2 DIY ! diyAudio Member Join Date: Apr 2002 Location: Stavanger, Norway	More about tone-controls here: http://www.zero-distortion.com/views/glavna.htm Arne K __________________ Ars longa, vita brevis

12th October 2003, 06:55 PM	#6
mrfeedback diyAudio Member Join Date: Feb 2002 Location: Perth, Australia.	Quad preamp tone controls are different and useful. Eric. __________________ I believe not to believe in any fixed belief system.

13th October 2003, 08:10 AM	#7
vytas diyAudio Member Join Date: Oct 2003 Location: Vilnius	Monday morning... Good morning, Thank you very much, for replay, I found some interesting things in EchWars sugestions, I shall try to implement some ideas. I understand Mlloyd1’s idea, at this moment I use two amps without tone control, and I bild one more High quality amp, in this one I wish to instal t.c. I worked about ½ year with Baxendall solution, read many articles, tried active t.c. used “tonestack” soft for calculations, used different loads…. And spend many $… One more question: I had never tried Quad amps and preamps, are they good or just medium quality? Thank you for replay... and greetings from Lithuania

13th October 2003, 05:39 PM	#8
Jan Dupont diyAudio Member Join Date: Apr 2003 Location: Copenhagen, Denmark	QUAD Preamps I think you will chatagorise the QUAD preamps as "medium" quality, however I'm very please with my modified 34 preamp. And I very fond of QUAD's "Tilt-circuit" for tone control (that is if you want or need tone controls at all.......) __________________ Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com


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11th October 2003, 12:11 PM	#2
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	How about this: http://www.angelfire.com/electronic/.../Amp-Tone.html Passive setup... If active is a considration, search for "Baxendall tone control" on the web...

11th October 2003, 12:20 PM	#3
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	Interesting. Found passive versions of the Baxandall filters...shows you what I know about filters....little... http://headwize2.powerpill.org/proje...=equal_prj.htm

11th October 2003, 05:36 PM	#4
mlloyd1 diyAudio Member Join Date: Feb 2001 Location: illinois	I know you said "passive". However, I'd urge you to consider the active, "baxendall-like" tone control design featured in the Apt preamp from some years ago. I posted the relevant parts of the schematic some time ago (a search should find it here and a patent search should find it elsewhere - it was patented. I'd post it again but my stuff is all packed up). A key point was that it added a unity gain buffer to minimize interaction in mid band. The buffer also made the math easier - when I was younger, I liked deriving the equations for all kinds of filters and comparing the results to various simulators we used to play with. I liked the Apt preamp for it's day and I built versions of the tone control for some of my earlier preamps which are still serving friends well. Of course, now I don't use tone controls at all, but that's another story for another day. mlloyd1

14th October 2003, 06:42 PM	#9
dimitri diyAudio Member Join Date: Oct 2002 Location: retired	May I recommand you Williamson Audio preamp, EW+WW, Dec., 1993, pp.1012-1013

14th October 2003, 09:43 PM	#10
Nelson Pass The one and only Join Date: Mar 2001	It will amuse you to consider that Tom Holman got his chops patenting a tone control circuit, which I can recommend.

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