l2 audio subs

[Supreme Soundz]

hi looking to beef up my bass a bit this year ive got a jbl 18 active sub but i want more punch tighter bass so im looking to sell it and replace with 1 or 2 smaller actives has any one used or had any experience with the l2 audio active bins

[Sapphire Disco]

They look good for the money but the spec is not that great.

96db
400 w rms
4 ohms

[abracadabradisco]

Having just seen them on a website I think 45 kgs is rather heavy for 15" actives but then I do not look at many. 400w RMS at 4 ohms really isn't that good with the low spl rating.
I certainly would look for better than these.