So I am in the process of "upgrading" my rig. I have a Carvin Pro Bass 500, into a Carvin 2x10 and a Carvin 1x15 (both have Emminece speakers). I just purchased an Ampeg SVP-Pro preamp, which should arrive next week. I also have a Hafler Pro5000 amp that was running our pa, but we have gotten a pair of active loudspeakers for that job (Yamaha ms400's). The idea is to take the Hafler for my rig, and go from there into the Carvin cabs. My question follows: I use the biamp feature on the Carvin sometimes at shows, and when I'm recording. Neither the SVP-Pro or the Hafler are biampable, so I'm wondering if there is such a thing as a good quality crossover for bass, to seperate the lows from the mids-highs of the SVP, if needed. I can spend a few hundred, but I'm willing to save for a while if I need to. Something "transparent." Although color is fine if it sounds cool. Oh, and does anyone have any opinions about how noisy the SVP is? The Hafler has a slight buzz that is pretty tolerable. Thanks ahead.