You can hook up a sub a few different ways. One is to run speaker cable to the sub, then from the sub to the mains speakers. For this your sub must have 2 sets of speaker cable connectors - one set in, one out. This allows you to use the sub's crossover so you can select a lower limit for your main speakers and upper limit for the sub. Not ideal since you have to run 2 sets of speaker cable, and go through the sub's crossover.
The most common way is to use 'pre-outs' from your integrated, using a y connector and single rca into your sub. Using this method you can't use the crossover in the sub, except to set the sub's upper limit. If you integrated does not have pre-outs or tape out, obviously this method won't work.
The third method, which is used by REL and MJ Acoustics (only as far as I know), is a high level Neutrix cable that connects to your speaker terminals on the amp, and has a single connector to the sub.
Hope this helps.
The most common way is to use 'pre-outs' from your integrated, using a y connector and single rca into your sub. Using this method you can't use the crossover in the sub, except to set the sub's upper limit. If you integrated does not have pre-outs or tape out, obviously this method won't work.
The third method, which is used by REL and MJ Acoustics (only as far as I know), is a high level Neutrix cable that connects to your speaker terminals on the amp, and has a single connector to the sub.
Hope this helps.