volume control on 01 focus

why does my aftermarket stereo goes down like the factory one when u slow down?

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joe21632 wrote:

It must be broken - it should only go quieter when *you* slow down :-)
If that is actually what is happening, it's meant to. One of the connections to it is a speed reference signal from the ECU.
On the standard Ford unit it is a selectable item from the menu, so it can be turned off if not required. It may also be on your aftermarket one if you check the instructions that came with it.
HTH
Chris
--
Remove prejudice to reply.

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its known as AVC(automatic volume control)as you speed up the volume goes up to mask the sound of the engine rpm it can be turned off-should tell you in the audio guide book
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