Perfect replacement for the Audi B8/B8.5 Bang&Olufsen 'subwoofer'
Purchased this item to replace the appallingly poor excuse for a subwoofer included in the Bang&Olufsen system in the B8/B8.5 Audi A4/A5/S4/S5 vehicles.
This subwoofer is much heavier, and much better built. It's not a drop-in replacement (you will need to apply sound deadening material to the rear shelf, and raise the subwoofer with an MDF ring in order to seal this unit) but the effort is well worth it.
This sub functions quite well as a free-air subwoofer. It provides just enough bass without being overpowering, or droning. It still doesn't hit the lowest frequencies in a free air configuration, but am pretty certain that performance would be even better in a sealed or ported box enclosure built to the appropriate dimensions and volume.
If you're looking to win SPL competitions, or rattle your neighbour's windows, this may not be the sub for you. If you want a little extra kick, and some beefier bottom end, this item is perfect. It's quite sensitive, so it doesn't require an obscene amount of power to run it. I'm running it off the stock B&O amplifier, and it's much, much better than the OEM item, especially after a few hours of use. Highly recommended for the money.
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