I just started a long term restoration project for my 1990 740GL (193k+)covering everything mechanical, electrical and cosmetic (after I neglected it for a long time) and just put in a clarion cd receiver last week which I didn't like, so I took it out and replaced it with a sony cdx-r3000. My question is, has anyone been able to use the existing volvo eq's (I have the 7 band model) with any aftermarket radio- if so, how? Right now, I took out both the stock amp and eq, but if I can reuse the eq, that works for me. I have the standard 4 door speakers, plus I put 6x9's in the rear deck several years ago (took some serious deck metal cutting to make that work), but they are currently disconnected; the door speakers are connected to the speaker outs on the radio and I plan to power the rear decks with a separate amp from the radio preamp output.