Okay, I'm going to swallow my ego on this one. I recently purchsed a Quantum 5 that I really love for the playability, but the tone controls have pretty much thrown me. It's got the passive Bartonlini pick-ups and a "3 band eq". The bass has 4 knobs, the first (moving from left to right if you were holding the bass) is obviously volume, the second and third are mid-range (I think) with a middle click, the fourth is a bi-level knob with the top being treble and the bottom being bass (I'm pretty sure). The bass didn't come with any documentation explaining the electronics and while I can dial a good sound up without knowing (it is Modulus after all), I know I could do better with a real understanding of each function of the onboard EQ. If you folks need any additional information, just let me know. "Help me TalkBass, you're my only hope." -geo?