i found a great sub for the back of the roadster.
it's a kenwood and its the exact size to fit underneath the foldable shelf for the convertible top.
you could even do what i did, i fit a plastic **** in the switch for the roof mechanism.
you know the one that won't allow the roof to work if the foldable shelf is not put down.
so the roof goes down now and it's about 0.75" away from the speaker.
it sounds great and the colour even matches the trunk.
the shallow end goes towards the front of the car.
here is the link, i got it used on ebay for $60.
http://www.crutchfield.com/S-MVDtrtO...10&I=2065TC104

 

I'm confused, You say it's a kenwood and the link you give is for a kicker. I'm interested in it because I installed a kenwood powered 10" tube which takes up most of the trunk and my wife keeps complaining about no trunk space. I have a few questions for ya. How deep is the shallow end, and how deep is the thick end.Is the sub facing up or down? What size amp did you use with it and does it add a lot of bass? I like bass but don't need the rumble of thunder that you hear in some cars while sitting at a stop light. Could you provide a picture. I also jumpered out my trunk cover because I found that the bass was better in the car with it in the folded position.

 

sorry it's a kicker not a kenwood.
the link i passed on had all the measurements and specs.
i have it hooked up to a Blaupunkt amp.
200 Watts RMS, which is too much as when i turn it up it starts distorting.
it's a very clean bass.
depends on how you have your crossover set.
i have it set to 200Hz which sounded the best cause i took out 50hz and below from the door speakers, which stopped them distorting
here is a pic (sorry about quality, taken with phone).

 

Thanks, I'm going to start looking for one on e-bay. Thanks for all the info. If you happen to see one give me a shout. I'll let you know when I get it installed.