2023 Mazda3 Non-Bose Sound System - Change This One Setting For Better Performance!
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 Published On Apr 20, 2023

This applies to any model that has the standard "8 speaker" setup from 2019 onwards. Also, set EQ to advanced so you can change your custom EQ any way you want. It's not gonna reduce your need for a subwoofer, and it will completely invalidate the speakers on the rear doors, but at least it sounds better generally speaking.

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