Unknown device

Asked by Guru991L1 Jun 01, 2017 at 08:10 PM about the 2015 Mitsubishi Lancer Evolution MR

Question type: General

I have a device in my car thats wired and it says
freqency and rev and normal and has a button to
it,dont know what it is

4 Answers
1,435

AngryYamahaR6 answered 7 years ago

Yes, that device is like what controls the audio. "Rev" stands for reverse, it is in every car. What "rev" does is that it flips the polarity (-/+) of the Sub relative to the rest of your speakers. This essentially puts the sub 180 degrees out of phase.

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