GGG Orange Squeezer is too bright

[Wagster]

I built a stock GGG OS and it's a little too clean and bright sounding. I have a older OS that's warmer and has a little grit to it. Where should a start to warm it up?

Thanks,
Billy

[bipedal]

A couple of thoughts come to mind:

1)  Increase value of the input cap to let more bass freqs in.  Won't reduce brightness, but might balance it better for your setup with additional lows.

2)  A simple high-cut (low-pass) filter network just prior to volume pot can shave off some high freqs.  Play with some values in this calculator to determine what value resistor and cap to try.

3)  All things being equal in volume controls, I associate larger volume pot values with brighter tone, so going to a smaller value volume pot could darken this.

Others may have good suggestions or corrections to these ideas.  

- Jay

[Mark Hammer]

Stick a cap in parallel with the 220k feedback resistor.  Use a value that suits your taste, assuming the formula F = 1 / [2*pi*R*C].  For example 100pf would start to rolloff treble around 7.2khz, and 82 pf at 8.8khz.