Live PA help

[Tony W]

If you get a separate bass bin like Flash suggests, you'll need an amp to drive it as well. Many amps on the market now have a built in crossover as well. My QSC amp has one, but I think it's static at 100hz as well.

[Flash Harry]

Bass bins need the 3db point at about 400Hz.

[BAG]

High power passive crossovers are quite lossy, you're better off doing it at low level and amplifying the individual outputs separately.

That's the problem. That isn't possible for the top bins without pulling apart the powered mixer to get between the mixer and built-in amp. And after some reading last night i found out exactly what you say, that the passives will most likely affect sound quality as they are quite lossy.

Running the separate bass channel is no problem and most self powered subs have their own crossover so that is the easy part. The problem is that without using a crossover to send the highs and mids to the top boxes they would still be getting the full range and distort on the lower frequencies.

You can make a passive low level crossover simply and cheaply, with a handfull of components, some bread board and a soldering iron. If you're interested, let me know.

If it as cheap as you say i might give it a go and see how good the sound is.