Hi. I have a black Russian Muff and love the sound. However, the bypassed sound is awful. Also, the fuzz lacks a slight bit of low end. Possible solutions: 1. Buy a Boss LS-2 (can get one for €65 now) for bypass and blend. 2. Buy an EHX Deluxe Bass Big Muff (€88). Which one would you choose? Other considerations: the Russian Muff is total pain in the arse practically: reversed jacks, low quality jacks and pots, no 9v-in, unnecessarily large (especially with an LS-2 attached to it), no true bypass etc. But I love the sound and want to keep it original. I'll deal with all the shortcomings, unless the Deluxe sounds equally as good, or better.