BOSS - OD-2r into OD-2 conversion

[midiez1997]

Hi!) I haven’t written anything here a long time ago.
I want to find out one thing from the guru:
I have two pedals: od2r and old japanese od2
1) why does od2 squander the volume in some amplifiers, and does od2p have a large volume margin?
2) How can I turn od2r into od2?
The main difference in the sound is that od2r is a little more noisy ... it has more brightness, and not much density in the sound ...
With the same settings, if you tidy the tone in od2r by 2-3mm, the sound becomes similar to 90%.
Can it be made completely the same?
I enclose the schemes, thank you all in advance for the answers!

[midiez1997]

I try remove C20 and C22 and connect a wire from the positive pad of C20 to the negative pad of C22.
as a result - the pedal almost does not produce sound ... and tried to rearrange the jumper diagonally, the same thing.

[mojah63]

I've read people lower or jump out R62 47K on the OD-2 to get a little more volume. The OD-2R has a the tone control isolated from the volume control. The whole section is designed to run at a lower impedance. So if you raise the volume pot from 50K to 100K after bypassing those transistors Q17 + Q18 you should get as much volume as your OD-2 You could experiment and try 250k... Thanks for the schematic

[Guilherme]

The discrete opamps in the OD-2 have a lower power supply (5.6V versus 8V on the OD-2r). This pedal is a candidate for an integrated opamp version, like the dylan159's "blue pilot".