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I recently did the Bavsound ghost subwoofer upgrades and have gone through the break-in period.
I'm pretty underwhelmed by the performance difference overall, that is, until I put the volume at 90+%. At extremely loud volumes, they really do start to shine. However, if it's not at high volumes they are pretty non-existent, and this is with the Bass EQ all the way up.
Any incremental changes I can do to make this better? Can I do an amp upgrade? Do I need to go all in and get an external sub in the trunk?
I currently have the HiFi Standard audio package (S676A) on my m340, along with the Ghost subwoofer upgrade. I did not do the Stage One speaker upgrade, as I'm mainly focused on icreasing the mid/low end.
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