After reading all the threads sticky'ed on keeping stock HU in Bose equiped sedan. It seems like I will need an amp that converts differential input signal to single ended input. Well great info, however finding one of these amps asides from JL Audio is proving to be quite a feat. I have no problem with the JL but for $559 for the 75X4 RMS, I'd like to explore other options. Any help?

 

I'm not so sure anymore that an amp that accepts differential inputs is completely necessary.

I have an old Xtant 603X connected to my Bose HU in my sedan. I don't know if it accepts differential inputs. I just spliced in an RCA cable into the audio out wires before they entered the amp.

 

I am starting to think the same since all you really should need is an amp that has speaker level inputs. I am looking at this Alpine MRP F-600 (100X4 RMS) for $299 to push my Polk MMC6500 components. I don't want to change the head unit because anything I want will run me 17-1900. Never in my lifetime will I pay that much for 1 peice of car stereo eqpt.