adding 1 sub???

Are you using a controller with a booth out? I run my sub through that.

Good advice, Chris.

Lots of subs will have dual inputs and high-pass outputs (as well as thru, but you can forget those in this specific setup). You run both master outputs into your sub and the high frequency bits go from the high-pass outputs to your top end speakers.

Having one sub with two top end speakers should work fine in most cases, unless you opt for small subs.

I would make sure I get a sub with connections like that (not all do btw), because it makes for the easiest setup. And then it is BOTH L&R master out into the sub inputs (L&R) and from the L&R HIGH-PASS (sometimes called low-filter but same thing) outputs on the sub to L&R speakers. No daisy-chaining to keep stereo.

@Danny Dobson: the problem with hooking up your sub to your booth out, is that the top end speakers still get the full signal (there is no crossover filter present in the signal path). So some of the advantages of having a sub in the first place (freeing up amp power in your top end speakers for the mid-low and mid signals) is lost. Another problem is that your top ends will also try to play the lower notes, adding to the sub low notes. More often than not this gives an off-balance in that frequency spectrum.

This is also why it’s not recommended if you have only one sub to rig one side as controller – sub – top end (through hi-pass) and the other side as controller – top end.

Use the search function on the forum, there have been a few posts here about suitable subs. Also you can look at some of the product reviews over at the blog.