I've got an MXR KFK 10 band EQ and whenever it's in my signal path I experience some kind of slight clipping on the harder picked notes. You can hear it on this quick comparison. SoundClick artist: Bleeding Arrows - page with MP3 music downloads The first run through was recorded guitar > EQ (bypassed) > amp, with EQ set with all settings flat and volume/gain at flat and using the supplied power supply. The second was guitar > BOSS SD-1 (bypassed) > amp. Let me know what you think.