Please Help Me About Dual Supply IC Gyrators

[Agung Kurniawan]

Hi everyone..

I'm planing to build the monster version of my current DIY guitar amp. And I'm going to replace the LA3600 at the end of signal chain with the IC opamp based graphic equalizer.

If I feed the IC with +/-15V. Where should I connect the bias resistor at +in on the opamp gyrators? Ground?

[antonis]

Yes..!!

[Agung Kurniawan]

Yes..!!

If I adding a Metal Zone to the amp and feed it +/-15, should I take every +Vb connection to ground?

[TejfolvonDanone]

Most of the time the bias is half way between the two supply to allow the signal to swing in both direction with the same amount of headroom. So if this was the case in the previous build the it should be in the new.

[antonis]

If I adding a Metal Zone to the amp and feed it +/-15, should I take every +Vb connection to ground?

If it bothers you, leave the Metal Zone as it is and feed it with +9V/GND..

It will work just like an independent pedal...

P.S.
Take care of voltage rating of capacitors connected between Vcc and Vee...

[Agung Kurniawan]

Well, I were too lazy to make the +Vb power rail on the pcb