I have a 2000 Boxster. I added the rear speaker kit and I am very pleased with the sound. I brought it to an auto store and had them install the speakers and attached all to the factory amp. I know they had to purchase some type of attachments so that everything would work together. I took out the porsche stereo and added an after market pioneer.
I wish I could be more technical, but I am not very mechanical. Just wanted you to know that it can be done.
Eric
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