Mine came mounted on the floor in observers compartment and was not very effective there, to muffled. at $400 they are not worthwhile, for $200 it is a cheap solution to add some bass. I just completed a duel 10" kicker system located under the dash and with amp was over $900 but way better than any basslink. Whats it worth to you?
I have a 94' PS205. I mounted my BassLink underneath the dash of the driver's cockpit. I had to remove the carpeted particle board fascia to do this, but I like the location since it uses unused space and is about as dry and out of the way as it gets on a boat. This mounting location does localize the bass for the driver to a degree. I'll try to get you some picts, but I'm lacking a digi-camera.