I looked at the wiring for the 6 channel amp on the Porsche service manual. The amp has outputs labelled FL, RL, SL (plus FR, RR, SR).
F is for front and R is for Rear, but what about the S? I assume it is for Subwoofer since it is wired to the "DEEP RANGE SPEAKER" in the door. Does that mean there is a fixed, non adjustable crossover inside the amp?
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