rite guys, Im gonna be completely honest with u but Ive been talkin with the lads from work (halfords - ripspeed cardiff) and between us we think that this is the best way to do it...oh and while Im here we should set up a how to guide on this and this always gets asked and the good information gets lost to those who dont know how to find it.
the new shape clios (2001 onwards) use a 13inch component setup up front. The 1inch tweeter fitted below the skin of the upper dashboard is daisey chained off the 13inch speakers connections just before the speakers wiring begins to pass through the multiplug setup into the door. This multiplug setup in the door prevents any new wiring being run through the door without the use of drilling.
If you wish to use a aftermarket component setup in the front we would suggest mountig the new crossovers supplied with the speakers in the boot of the car and then makin four new runs of speaker cable down the centre of the car (to avoid interference) (i.e. 2 runs for the midbass, 2 runs for the tweeters). Then disconnect ur headunit from the speaker ISO block and wire the 2 new runs of speaker cable (connected to the midbass output on ur new crossovers) into a female ISO block cut in half (i.e. so only the speaker ISO plug remains). This will then plug into the cars original ISO block without doing any damage to the cars wiring and transfer the signal from ur new runs of midbass cable through the cars existing wiring and into the doors.
phew thats the doors sorted.
Now remove the top half of the dashboard and disconnect the original tweets from their wiring. tape existin wiring up to prevent short circuits (remember because you have not cut this wire further down the loom it is still effectively connected to the midbass speaker apart from a in-line bass filter). now fit ur new supplied tweeters aimed under the cut-outs in the dashboard and run the two remaining runs of new speaker cable up the new tweeters and jobs a good un