Mad professor Deep blue, help me

[dtaboso]

Yesterday I fineshed  Mad Professor Deep blue with 3 pots not mod volume.

I used OP275. This delay work and is very nice  but  the   tone has many bass and atenue signal guitar

I disconnect Resistor 12K of feeback loop then the tone is normal and treble but it has distorsion

if play hard the string. I dont know what can to do now

any can help me.

thanks
david
spain