Modified Baxandall tone control

[Zohaib Ahmad]

Modified baxandall tone controll using b50 k linear pots for bass & treble.

 

[MarcelvdG]

The circuit is completely analogue, so I think this belongs in the analogue line level subforum, rather than digital line level.

 

[Zohaib Ahmad]

V1

 

[Zohaib Ahmad]

V2

 

[rsavas]

You should try it out in LTspice and see the results

 

[Zohaib Ahmad]

You should try it out in LTspice and see the results

Yes i will try it in Ltspice

 

[Jeffh01]

You might find an issue with the opamp feedback connection in V2🙂.

Using 50K pots will make it easy to drive, but it will be a bit noisier and more prone to hum and noise pickup than designs that use smaller value pots. The smaller caps may be a bit cheaper though, so good for a lower cost design.

 

[Zohaib Ahmad]

You might find an issue with the opamp feedback connection in V2🙂.

Using 50K pots will make it easy to drive, but it will be a bit noisier and more prone to hum and noise pickup than designs that use smaller value pots. The smaller caps may be a bit cheaper though, so good for a lower cost design.

Thank you sir for your feedback.

 

[Mark Tillotson]

U1's inverting input's bias current is flowing through VR1's wiper which is a recipe for disaster if the pot gets even a tiny bit scratchy. Intermittent wiper contact will slam the output to the rails.

 

[Zohaib Ahmad]

Oops in the earlier schematics i forget to connect op amp output connection to the tone controller.
I update the schematics now its fine.

 

[ejp]

If you’re using Rod Elliott as a source you should be aware that his calculations are not correct, because he uses wrong equations. See the original Baxandall paper for the correct equations.

 

[Boden]

Where precisely does Elliot go wrong?

 

[ejp]

Compare his equations to Baxandall’s. Elliott doesn’t use the Y-delta transform.

 

[Zohaib Ahmad]

Used for bass & treble boost with active tone controller.

 

[ejp]

Can’t see anything active about that from the segment you’ve posted.

 

[Zohaib Ahmad]

Can’t see anything active about that from the segment you’ve posted.

This is only passive tone but actually it can work with active tone. If u have already active tone controll in your amp then you can add this one to your amp. Then your amp will have dual bass & treble controll. It will boost your amp bass and treble. It will give you sub bass.
But you have to cut off your amp nfb resistor and connect it to the capacitor then it will work. But di it safely.🙂
Here is example

 

[ejp]

If you already have sn active tone control why do you need this? I still can’t see anything that is either active or Baxandall about it. Please explain.

 

[Zohaib Ahmad]

If you already have sn active tone control why do you need this? I still can’t see anything that is either active or Baxandall about it. Please explain

I accidently wrote the active word on my earlier post in passive bass treble booster so i try to edit the post text but i could not do that.

 

[Zohaib Ahmad]

If you already have sn active tone control why do you need this? I still can’t see anything that is either active or Baxandall about it. Please explain

This is not active or baxandall type tone controll. This is a different from other tone controllers.
You are asking that if we have already an active tone then why we need this?
Let me explain. This type of tone controller is basically uses in class A amp to improve the dumping factor of amp.
If you have an amp like class A or you are already using an active tone controll with your amp but if your amp has low bass & dumping factor then it try to add this tone controll. This will give you bass like sub. I think you should try this at least once.🙂

 

[ejp]

It’s not a Baxandall tone control if it isn’t active.