DBX 234s

I'm quite impressed with the sound quality I'm getting from this. You might expect that filters as steep as 24 dB/oct might result in odd phase trouble, but I really can't hear any trouble, even when moving the x-over frequency up and down a bit. I don't hear any noise either even at high gain.

Just be sure to turn things on in the right sequence, because it gives a short loud spike right when you turn it on, which is probably why they didn't include a power button. In most cases this won't be a problem.