Right so i was thinkin about buying some sort of a preamp, be it a tech 21, pod, ampeg bsp, wotever and connecting it to a power amp like a qsc and then into into a speaker cabinet. Easy peasy. I understand the differences between pre/power amps etc. but at the moment i'm currently playing through a bi-amp GK, and i like the idea of the bi-amp, so i was wondering if u had a pre/power setup and a bi-ampable cab like one of the GK's how would you use its bi-amp capability, would u need to buy a seperate crossover for your rack, or do some power-amps come with built in crossovers? (or even do any cabs come with built in crossovers??(maybe a mesa powerhouse??)) Cheers for your help
Some amps do come with a crossover, or have the option of installing one internally. But tthe G-K cabs use a much higher crossover point than many PA-oriented crossovers are typically set up for. Do your homework... If there's one in the cab, it's always passive unless you're talking about a powered cab.
All of my biamp setups have the crossover in the preamp, not the power amp. Hard to find newer preamps with crossovers; I have an Ashley BP-41, a BBE 383 and a Yamaha PB1; they all have internal crossovers that drive stereo power amps. These are all pretty old, but you can find them on ebay sometimes.
The Aguilar DB680 has a crossover also. I initially started my pre/power combo with a preamp and changed back to full range. Since my cabs put out great full range tone, I didn't feel I gained alot with the separation going into standard full range speakers...
Since the advent of good "full" range cabinets containing decent drivers and well designed crossovers, bi-amping is no longer a much needed thing. It involves extra power amps and complex filter circuitry to accomplish. IMHO bi-amping is a hold over from a bygone era. Paul