SOLD !I'm selling my custom sub enclosure from Bassforms with Alpine Type R for $275 shipped. The enclosure ($299) and subwoofer speaker ($199) would be around $500 if purchased separately. This is being sold as a complete unit only as the Alpine Type R is tuned and sealed in place in the enclosure. Please note this enclosure is designed for an e90 M3 or 3 series sedan without a trunk mounted CD changer on the left rear trunk wall.
There is some chipping in the fiberglass enclosure from installing the speaker (all my fault), but it's only cosmetic. Nothing that keeps if from sounding as it should...and it hits pretty hard with the Rockford Fosga te T400.2 that I used to power it. And it can be carpeted to cover the chips and better match the trunk.
PM if interested and payment will be through PayPal. Thanks.
The link below has pictures of the installation about half-way through.