I searched around but all the boosts I found were clean boost or overdrive. I have a need for a low-end frequency boost. Basically I just need a pedal that has a bass knob on it that functions like the bass knob on a preamp. I notice my tone gets a little thinned out when it goes through 2-3 pedals and I'd like to add some bass boost at the end of the chain to restore the loss.......or maybe just add low-end to sound even bigger. Anybody make a simple pedal with just low-end boost? Any kits out there?