In reply to:

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The purpose of having two separate control wires is for cars with motorized antennas.

There's no point in raising the antenna just to listen to MP3 files. The antenna should only raise when you switch to the tuner module.

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There's also no point powering the antenna amp just to listen to MP3 files. Is the output on the tuner's "antenna" lead sufficient to control/power the antenna amp?

The power amp is a different (and potentially confusing) issue, of course - that should be switched (not powered) from the player.


(Not an issue for me personally, I'm just trying to clarify)

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Toby Speight - 040103385