[KevinH1990]

Here’s a link to a thread I used when I replaced my door speakers. It may contain some helpful information: Door speaker recommendations?

I think you are on the right track with your troubleshooting plan. The challenge you face is that all of the equipment you are using is close to 25 years old.

I will look for the amp tomorrow night. I may be able to mail it to you on Thursday. If you want it, send me a pm with your address. I will let you know the shipping cost after I mail it. The amp worked fine when I removed it from the car and replaced it with a 6-channel amplifier from a 996 cabriolet. That doesn’t necessarily mean that it still works, so you might want to consider buying a new after market amp. If you are seriously considering rear speakers you could buy a 6-channel amp and have the capacity to support them when the time is right.