I've got phase issues... I put an ACG02 preamp in a stomp box. It's a filter-based preamp designed by John East. It has a low-pass filter stack and a high-pass filter stack, and is designed for on-board installation. But I put it in a box. So far so good. But - I want to blend it with the unfiltered sound of the bass. So I got a Boss LS-2, which *seems* like it would do the trick. But the problem is that the output of the ACG is out of phase with the unfiltered signal. Oh FX Gurus, hear my plea! Help me get back into phase! @johnk_10 - any ideas? Thoughts: 1. Put a pedal that inverts phase after the ACG. Qualities desired - small (1590a), does not modify the sound, high quality, inexpensive. 2. Build a phase inverter and put it after the ACG. Ideally in a 1590a box. I found this page Operational amplifier applications - Wikipedia but would really benefit from a specific circuit or parts list. This could be an "always on" as it would only be in the loop with the ACG. 3. Replace the LS-2 with something else. Again, the goal is to be able to take the ACG in or out of the circuit, blended with the natural sound of the bass. The blended or natural bass sound would then go to the other effects in my board. Specific recommendations, other ideas, and good jokes welcome.