[The Rovering Member]

I've just completed the installation of the matched rear speakers/tweeters & they've further improved the sound as would be expected. The only bass mod' l have performed is to cut away the insulation behind the rear bass speakers to open up the internal doorspace. It's a much cleaner sound now including the bass response which is a subtle improvement though l daresay the SLE-equipped Symphony will increase the response further. I've read about fabricating sealed speaker mounts but will make that judgement when the headunit swap is complete. The new rear units just squeezed into the factory cases & l cut away the clip surrounds from the rear tweeter mounts which opened up enough space for the new units to fit snugly behind the standard grilles, retained by the metal brackets which came with the kit.
Overall my outlay for the four speakers & four new tweeters was £80 (front Pioneer units from a fellow forumite) which is not a lot of money for such a great improvement. Even if l was retaining the Harmony it would have been well worth it.