Baxandall tone control circuit

mckvak · 22nd October 2009, 01:08 PM

Hi all. I look for a Baxandall tone control circuit, which can control bass and treable on 20dB or more. My english is not good I know sorry

stinius · 22nd October 2009, 04:13 PM

Quote:

Originally Posted by mckvak

Hi all. I look for a Baxandall tone control circuit, which can control bass and treable on 20dB or more. My english is not good I know sorry

Hi

Your English is good enough:

I hope this helps.

Max bass boost = (R1+R2) / R1

Max bass cut = R1 / (R1+R2)

Max treble boost = (R5+R1+2*R3) / R5

Max treble cut = R5 / (R5+R1+2*R3)

R4 shall be larger or equal to 10*(R5+R1+2*R3)

R2 shall be much larger than R1

In the example circuit:

Max bass boost = 20*log ((11k+100k)/11k) = 20dB

Max bass cut = 20*log (11k / (11k+100k)) = - 20dB

Max treble boost = 20*log ((3.6k+11k+2*11k) / 3.6k) = 20dB

Max treble cut = 20*log (3.6k / (3.6k+11k+2*11k)) = -20dB

mckvak · 22nd October 2009, 04:58 PM

It look easier than it seem. Is possible use transistor on the way out, because operations amplifier and another integrate circuit is not allow for my poject.

tiefbassuebertr · 22nd October 2009, 05:56 PM

additional informations and weblinks you can find here:
need equation for 3 band baxandall equalizer

stinius · 22nd October 2009, 06:29 PM

Quote:

Originally Posted by mckvak

It look easier than it seem. Is possible use transistor on the way out, because operations amplifier and another integrate circuit is not allow for my poject.

Hi mckvak

Yes it is possible to use transistors instead of an opamp.

Maybe you should post the circuit you have made so far, that you would like to use the tone control with. If you have a gain stage maybe you should try to implement the tone control around that stage, or you could use a passive tone control.

stinius

mckvak · 23rd October 2009, 02:05 PM

This is the circuit. But way out sign as REC out I will not use

22nd October 2009, 01:08 PM	#1
mckvak diyAudio Member Join Date: Aug 2009	Baxandall tone control circuit Hi all. I look for a Baxandall tone control circuit, which can control bass and treable on 20dB or more. My english is not good I know sorry

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22nd October 2009, 04:58 PM	#3
mckvak diyAudio Member Join Date: Aug 2009	It look easier than it seem. Is possible use transistor on the way out, because operations amplifier and another integrate circuit is not allow for my poject.

22nd October 2009, 05:56 PM	#4
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	additional informations and weblinks you can find here: need equation for 3 band baxandall equalizer

23rd October 2009, 02:05 PM	#6
mckvak diyAudio Member Join Date: Aug 2009	This is the circuit. But way out sign as REC out I will not use

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