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      01-18-2024, 12:44 PM   #2
Diirek
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Drives: E93 M3, G05 X5 xDrive50i
Join Date: Jun 2018
Location: Boston

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Aftermarket replacement options are limited and expensive, and I don't believe they'll provide the the oomph you're looking for. Technic PnP provides an adapter harness that will allow you to either install an aftermarket amp to the factory speakers (or power replacement/upgraded underseat woofers) or to hijack the audio signal and install an aftermarket amp and subwoofer (the direction I decided to go). Ended up utilizing the empty spare tire well to keep things clean and not eat up any cargo space.
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