First I had emg 45J's with a btc in the bass. Great sound but too tame or flat or something. Not enough lows or highs. I changed everything out for some Bart CB soapbars with a Bart ntbt (bass and treble) Sucked big time! It had great low mids, but huge undefined bass, and thin, compressed highs. I'm going back to the emg's. Any opinions about using the obp-1 to help goose the emg's in the lows and highs? I think the low end eq point on the btc may be too high to add much oomph. HELP!!!!!!!