[QUOTE=Mr. Widget;427764]A few random thoughts on your project:

1. The LE15B woofers are 4 ohms each, so make sure your amp can handle a 2 ohm load. I am not sure either of your Macs will be happy with that load. I would seriously consider a solid-state amp for the woofers.

Since the LE15b is nominal 4 ohm it might be a plan to wire them in series giving nominal 8 ohm
Given that Billy is gong to run active relative level adjustment is easily implemented.

In that same subject Billy with the DBX you may find that the output is a little 'hot' for the input to the Mac power amps. You will probably need to provide some attenuation or your gain structure wiill be all out of whack.
More on this later once you get it all plugged up and running.
I'm assuming that the DBX is switchable to 2 way operation ??