Ok. So, all the wiring diagrams I have found for the 460 sound do not include the one AMP located in the front under the radio and CD. I have found one diagram which appears to match one plug on the amp, indicating it controls both the front and rear speakers. If I am correct, this mean it actually controls the "mid-high" speakers in the top of the back panel and the small "mid-high"'s in the doors. The low-bass speakers are actually controlled by the 2 AMPS located in the back under the seat (convertable) or just in back for the coupe. My real question is, does anyone have any information regarding the actual amps of the speakers? From all the diagrams, it apears both left and right are "in-line" which means the amp would need to push a total of 4 amps for both on one side to power 2 speakers.
If the left or right side "mid-highs" are not working, it is actually more likely the AMP under the radio in front. From my perspective, this a cheap way of doing this and also very inconvenient to problem solve with. I am currently pulling all the amps and head unit and replacing them with a new head unit and amp. I will run the "mid-highs" off the stereo head and the "low-bass" from a new amp in the back. The only real question is, what are the Amp ratings on the speakers? I would like to use the old speakers for a while until I can replace them, but will probably blow them out if I get the AMP rating wrong the first time.