Rear speakers - How do I know if my amp is 6 ch.

[Tool Pants]

First there was DSP in 1999. That had a 6 channel amp.

In 2002 DPS was replaced by Bose, another 6 channel amp piggy back.

In 2003 Porsche went to MOST, another 6 channel amp.

A 2002 with the standard amp and 220 radio will be 4 channel.

This is from my 8 years of failing memory.