Quote:
Originally Posted by Bryan1978
I want to upgrade the sound system of my wife's x3m40i. I don't have the hk system. What route should i go, Change the amp or add subwoofer? Thanks
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I also have the standard hifi option. I did the bavsound speakers, bimmertech alpha amp, grs underseat woofers, and added a 1500watt audiocontrol amp with a custom box for 4 10inch sundown subwoofers. The upgrade is 1000% worth it and even without the subs in the trunk its well worth it