Simple tonecontrol
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skipwave
Well-known member
Interesting. I was just thinking about this for my 2 Watt guitar amp. There is not enough space in the box for seperate Bass, Mid, Treble controls. I'd like to do a single Tone control.
Can you provide example values and the expected result? What's the Q like, how broad to how narrow does it go?
Thanks!
I was just looking at NYDave's presence control for inspiration, and now I can't find it. Weird. I'll have to ask him bout that. Anyway, Dave's 2Watt amp thread.
Can you provide example values and the expected result? What's the Q like, how broad to how narrow does it go?
Thanks!
I was just looking at NYDave's presence control for inspiration, and now I can't find it. Weird. I'll have to ask him bout that. Anyway, Dave's 2Watt amp thread.
Ah, finally a reply. :grin:
Its kind of a simple design, think of it as a baxandall/james without any control over mid freq.
The output sits at about -6db (dependant on source resistance) with the pot(s) centered (assuming linear pots). If the load is high enough Z, the response is flat.
Turning the pot to max treble, min bass the output will be about -30db @ 20hz,
and the oposit will do the same @ 20khz.
The only downside is that there is no real control over mid freq. as in standard tonecontrols where you can cut bass and treble to achive a mid "boost" and vice-versa.
This is not a problem for me as i use this in a guitar amp where i think that mid should be left alone.
Example:
R1, R2: Dual gang pot Linear 2x470k
R3: 470k Edit: make that 330K
C1: 500pf
Its kind of a simple design, think of it as a baxandall/james without any control over mid freq.
The output sits at about -6db (dependant on source resistance) with the pot(s) centered (assuming linear pots). If the load is high enough Z, the response is flat.
Turning the pot to max treble, min bass the output will be about -30db @ 20hz,
and the oposit will do the same @ 20khz.
The only downside is that there is no real control over mid freq. as in standard tonecontrols where you can cut bass and treble to achive a mid "boost" and vice-versa.
This is not a problem for me as i use this in a guitar amp where i think that mid should be left alone.
Example:
R1, R2: Dual gang pot Linear 2x470k
R3: 470k Edit: make that 330K
C1: 500pf
skipwave
Well-known member
[quote author="Gus"]http://www.duncanamps.com/[/quote]
More to the point: http://www.duncanamps.com/technical/tonestack.html
I'm gonna read this and come back later: http://www.duncanamps.com/technical/baxandall.html
Kit - Thanks for the reply. I'm looking forward to tinkering with it. I plan to tweek out my amp, and guitar, with a combination of your tone control and the midrange presence control. This is what I love about DIY. My own special flavor of guitar splat. :green:
More to the point: http://www.duncanamps.com/technical/tonestack.html
I'm gonna read this and come back later: http://www.duncanamps.com/technical/baxandall.html
Kit - Thanks for the reply. I'm looking forward to tinkering with it. I plan to tweek out my amp, and guitar, with a combination of your tone control and the midrange presence control. This is what I love about DIY. My own special flavor of guitar splat. :green:
