Base Audio upgrade

[Usman750]

I have a 2010 Bmw 335i sedan with the base audio. I want to upgrade the bass mainly but I am not sure what ways to do so. I preferably would like to change just the subs under the seat and add an amp but I have to put a box in the trunk I’ll do so. Any suggestions?

[154e90]

I don't have much experience with audio equipment, but bavsound has a good reputation for plug and play BMW audio system upgrades. I'm sure other members will have more detailed answers but bavsound is the first place I'd look.

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[White94RX]

The easiest thing to do will be to add a small amp, sub, and box in the trunk. The battery and amp is in the trunk and will make wiring easy for an experienced tech.