[MaconPaul]

I’m adding a sub in the rear arm rest. I plan on using the adaptor in the attached image. It’s a LOC, adaptor, remote turn on, cables included package and plugs right into my base 328i w Hi Fi option. This will leave all factory speaker the same with no wire cuts. Should I get a 2 ohm or 4 for this 3rd sub I’m adding? Also is there another adaptor as good as the attached for less money?

[ctuna]

First of all the underseats are not really subs .
And with the Hi Fi system they produce very little output.
You have to add and amp for a real sub and since the line converter
does not load the rest of the system it's up to you what kind
of amp and sub you want to add.

subwoofer threads
http://www.e90post.com/forums/showpo...2&postcount=66
http://www.e90post.com/forums/showth...t=Ultimate+Sub
http://www.e90post.com/forums/showth...ight=subwoofer

the stereo sub forum is here
https://www.e90post.com/forums/forumdisplay.php?f=27