View Single Post
  #10   Report Post  
Posted to sci.electronics.repair
gregz gregz is offline
external usenet poster
 
Posts: 2,415
Default Does anyone make a crossover to be used on an INPUT?

wrote:
I want to rig up a subwoofer, but I know that crossovers are expensive,
and since I am running high powered commercial amps, I'd need a hefty
setup. Then comes the need to combine the left and right channels
without loosing stereo separation.

I decided to go another route, My power amp was 600W (RMS). stereo. I
got a good deal on another amp that is also a stereo commercial amp,
rated at 500W RMS. Both amps are bridgable. The plan is to run the
outputs from my preamp into Y adaptors and feed the left and right
channels to BOTH amps. One of these amps I'll bridge and use that to
power a single subwoofer speaker.

However, I need a means to send only the bass to the amp that powers the
Subwoofer. Is there any sort of crossover made that goes in the input of
the power amps, after the preamp?

I have also thought about just putting an equalizer into the input of
the amp that feeds the subwoofer and raise the low end of the frequency
and cut the highs. I'm not sure if that will adaquately work or not.
I'll probably try it, but I have not yet built my subwoofer cabinet.

Either way, I know that 1100 watts rms is more than enough for a home
stereo...


There no need to sum bass in stereo, just use one channel. That can cause
that channel to be different with loading. You make easy line level
passive, but what order, and how is that going to mix with upper, phase and
frequency. Seems like a full active crossover of all three speakers will
work best, but you still have to determine order of filter and frequency
for combining.

Greg