VPower: I may possibly sell the sub, depends on what it's worth, but you probably won't like it much. It is better than no sub at all, but not by far. You cannot even tell there is a sub at highway speeds. Sounds almost decent sitting still.
tmht: The Basslink sounds great! My wife has an xtent amp pushing a boston 10" sub and the basslink sounds almost as good and hits plenty hard with factory deck.
I have not quite figured out how I'm going to mount it. Maybe on the back seat or in the corner of the hatch.
It took a bit of work, but finally i figured it out. I got the basslink running off of the factory sub harness. Of course I had to wire in a power wire and fuse the battery and ground it.
The factory harness has 8 wires coming out of it which do not correspond to the above diagram. there is +12v power, +12 ACC, +12 remote, Gnd, and 4 wires for audio. The basslink has both speaker-level and preamp inputs. At first I wired the audio coming off of the harness to the speaker-level inputs assuming that the wires were just spliced into the rear speakers. it worked, but I had to turn both gains on the sub all the way up just to hear an bass at all. I was totally unimpressed. I then cut a regular set of rca cables and wired them from the harness to the preamp input. There was less than 1v coming out of the harness so i figured it would not hurt anything. It sounds great, nice loud clean, tight bass.
Now I have to turn the gains down as the bass is too much! I like it better than the 400w amp and 12" sub I had in my last car.
If anyone is thinking about the basslink, do it! Much cleaner and easier to install than the usual amp and sub. If you don't mind sacrificing a bit of your trunk space it is totally worth the ~$200 they go for on ebay.