E87 Subwoofer Installation

[naytrix]

Hi all,

I have a 2010 118D E87 with the Business Radio inside, I want to install a subwoofer but I am not sure on which tools to buy and stuff. I have had a quick search and I have bought a line output converter from Halfords.

Since the BMW doesn't include RCA input, I figured this would be my best bet to tap it into one of the speakers.

I have noticed there are speaker grills underneath the seat but I don't think theres any speakers in mine? Unsure but I will have to have a look later today.

Can someone tell me the best guide or the best approach I can do with this please?

Kind regards
Jason