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Discussion in 'Amps and Cabs [BG]' started by ihaveaquestion, Jun 11, 2019.
Is it possible to control a tweeter's attenuation with an expression pedal?
I bet you could, a resistive divider to ground.
Do you think it could be made by anyone with experience in electronics, or should i trust only someone who deals with musical stuff?
Use to be able to buy empty crybaby wah cases. And use whatever value needed.
If you could fit the switch in there. And have a long pointless speaker cord.
Easier if a amplifier had seperate amp and active crossover. Simply control the volume with the head. Even have expression pedal if necessary
My opinion on tweets is extremely biased unfortunately. You just use a cab without one or turn it off. Call it a day
You'd be better off with someone with electronics knowledge.
Off the cuff, add a shorting 1/4" jack to the cab, and have the tweeter in series with it. The expression pedal would be a resistive divider that would shunt it to ground, generally speaking.
Back in the 1970s or 80s Electro-Harmonix made a stompbox called the Hot Foot which was simply a remote pedal controller for any potentiometer. There were no active electronics in the pedal, no circuitry whatsoever; it was simply a mechanical connection that transferred the motion of the wah-style pedal to the rotation of whatever pot shaft you snapped the attached cable onto.
Find one of those bad boys and afix it to the existing tweeter attenuator on your speaker cabinet.
The short answer is NO.
The tweeter level controls on cabs are not simple potentiometers, but "L-pads" that are: 1) designed to have an even resistance as they're turned through their travel. 2) They are large with large resistance elements because they are dissipating multiple WATTS of amplifier power. L-pads always have an impedance and power dissipation rating.
So, I doubt you'd be able to get the appropriately rated L-pad attenuator to fit inside a crybaby case, and the little plastic rack & pinion system isn't strong enough to turn it. Negative Nancy, I am.
Just get an EQ pedal.
Technically I'm sure its feasible. The mechanical side might be awkward, but there's nothing intrinsically impossible. The trick would be to use a cabinet that already has a tweeter volume control and replicate the circuit.
Musically... what's it going to give you - the ability of to change the tone mid song... I can imagine using a tweeter on/off I suppose, but is being able to vary the volume of the tweeter going to give you anything you couldn't gain much more simply by altering a wah wah pedal so that its a straight treble tone control? Especially as anything you do to the tweeter will surely not get to the PA.
I was going to suggest an elaborate system of pulleys, but this is even better.
That sounds lile it’s based on Neil Young’s original Whizzer. His tech built it for Rust Never Sleeps so he could remotely set the volume knob on his amp to a specific level. That’s how he gets his massive, barely controlled feedback sounds with Crazy Horse.
He’s long since upgraded to a digitally controlled unit with presets, and, if I’m not mistaken, control over multiple pots.
Sure it can be done. Attach a motor to the tweeter’s rheostat, control the motor digitally with a midi rocker pedal. Expensive.