Some feedback for you... I have ripped out my rear speakers, and have now fitted the dual-coil 8" sub that I bought off ebay, wiring up left & right inputs to seperate coil inputs on the sub.
In doing so, I found that the Renault wiring for the drivers side rear speaker was back to front, as when I used the +/- on the factory wires, the sub performed really badly, but when I swapped them over, it gave a much better sound! Also in fairness to Clairesclio, the stereo is rated at 4x15W, so not as powerful as I thought, but as the sub is dual coil, its getting 2 feeds, 30W in total, which isnt too bad.
As a result I have now Pioneer woofers & original Blaupunkt Renault tweaters in the front, Alpine tweaters on the rear, and an 8" sub mounted in a home-made MDF box sat on the shelf behind the seats.
I have not fitted any additional amp, just used the existing rear outputs to drive the sub, and put the tweaters in to keep a stereo perception from behind, and I refitted the rear speaker grills without the original speakers in place anymore.
Its all running from the original Renault tape/radio headunit with alpine under-seat cd changer.
The result, though clearly not earth-shattering from such a small sub, is a huge improvement over the flappy renault original speakers, and is good enough & loud enough for me it has to be said! May not impress your average max power reader, but fine for my more modest tastes!
I just need to get hold of some blue carpet to cover up my mdf box and some sticky velcro pads to affix it better to the shelf, and itll be job done! Will post some photos up when it looks presentable - as my home-made MDF thing doesnt exactly look very nice just now!
[Edited by 137699 on 24 July 2005 at 7:47pm]