I'm gonna be installing my 20 gig EMPEG into my Subaru Impreza (2001, 2.5RS coupe), along with a Pioneer DEH-7400 unit for XM radio/CDs. What I'm planning on doing is using the EMPEG as a slave to the Pioneer so I can utilize the Pioneer's subwoofer-level preamp outputs no matter what source I have for the audio. Of course, the 7400 only has two channels for its AUX inputs. What I'm planning on doing is bridging the Front/Rear Left outs and the Front/Rear Right outputs together, so I will essentially only have L/R outputs for the EMPEG. Anyone know what the best hardware for bridging the channels would be, or if there's a better way to accomplish this kind of setup?