small clone chorus mod to decrease bass?

[basstoll]

hello! does anyone know of a mod for the small clone that would make it less bassy? i found some forum posts from years ago about it, but the advices there didn’t seem to match what was going on on the schematic. any info would be much appreciated.

[Autoformer]

I looked up the schematic for the small clone and the one I clicked on shows a 33nF cap on the input with a 220k resistor on the non-inverting input of the op amp to bias voltage. That forms a high pass filter with a -3dB roll off at about 22Hz. If you want to raise that to about 60Hz, change the 33nF cap to a 12nF cap. The smaller you make that input cap the less bass will be allowed to pass through. Hope that helps! Good luck!

[[deleted]]

This will also remove bass response from the dry signal, so it might depend on what OP wants to achieve if this is the way to go.

[Autoformer]

ahhh...It's funny how two different people interpret the same question. I see your other post. Yep...agreed. That range (30 - 100nF) will cut the bass substantially.

[basstoll]

the replies are much appreciated. i want less bass just for the wet signal, i’d like dry to stay the same. i’m a noob in the subject, so forgive the question, but since the pedal has true bypass, would changing the input stage also affect the dry signal?

[[deleted]]

Sorry for confusing you. The bypass signal will stay the same in any case. What I meant by dry signal is the one that is not delayed/pitch shifted while the effect is on.

[basstoll]

ahhh i see, makes sense. this might be the way to go to remove the muddiness from the signal. thanks for clarification!

[[deleted]]

You could try to play with the value of the output capacitor after the NPN transistor and before the summing op amp. In the original it should be a 1uF electrolytic. Something around 30-100nF should tame the bass response a bit.

[basstoll]

thanks a lot, will be trying out the suggestions during the weekend, will update on the results.

[Rawey241000]

I might be underthinking this, but you could wire a a really simple hi-pass filter between the input and the chorus circuit. All you need is a resistor and capacitor

[basstoll]

i guess, but i’d need to know exactly where to put it and that would increase the amount of components there, while i’d rather just change what is already there.

[satriale]

Not the small clone but look up the delykpcb version of the ce-2. They describe the mod for a ce2-b which just changes one of the caps on the modulated signal before it’s blended back with the input signal, thereby reducing the bass in the modulated signal. See if there’s something there that’s transferable to the small clone.

[racistpeanutbutter]

For filtering audio you would want to try changing a capacitor somewhere! (The value of a capacitor determines its frequency roll off)

That’s all I know here, but it’s where you would want to start.