Originally Posted by NFS
If I decide to do the subs first will they work from the stock amp?
If so .. what do I need to buy and where can I get them?
Thinking about trying this first and if it goes OK doing the Alpine upgrade.
I wouldn't advise it - the SWS-8 subs require a lot more power than the stock items - more than the head unit is capable of delivering.
It's just as easy to wreck a speaker by underpowering it as it is over powering it, so I'd say do Alpine upgrade first (or at the same time) else you'll wreck your new subs.
I haven't found anywhere in the UK that sells them directly. They are a number of US based vendors on ebay. You're looking at about $350 dollars shipped for the pair.
Gone but not forgotten:
325i M Sport (E92), Black Sapphire, Coral Red Dakota, 19" 225's, Seat Heating, 6FL and de-badge
Replaced by 6.2 litres of AMG powered C class.