Should I port my subwoofer box? I've got 2 12s under the seat in my truck and with the windows down they hit like they should, with windows up they sound horrible,
East Yorkshire Retrofit Solutions Ltd - Yet another Seat Sound retrofit including subwoofer install and dash speaker install. We rewired the sound system to match the factory seat sound specification and flashed
Complete 6.5 Sound System With Included Booming Under The Seat Powered Sub
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Another Seat sound... - East Yorkshire Retrofit Solutions Ltd | Facebook
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Seat Sound retrofit kit – East Yorkshire Retrofit Solutions Ltd
For BMW X6 E71 E72 F16 F86 F96 G06 Under Seat Bass Speaker Subwoofer 4039449002432 | eBay
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