I left the foam around the edge as is it seemed to form a watertight seal against the adaptor. There are four pre-drilled holes.
Adaptor in place. Bought another pair which are more sturdy than the Sony ones and that would let the screws grip.
Woofer mounted. I put a ring of silicone on the back of the speaker and also some where the cables come out through the notch. Have had enough of water in the car already...
Soldered the cables of course. Please note that black and red aren't mixed up. More about that later.
This disc covers the hole were the tweeter is supposed to be.
Tweeter with adaptor in place. The adaptor was somewhat too small in both diameter and thickness so it wouldn't snap into place. I used super glue. Looking back I think that it would have been better having used the disc from the previous pic as a mounting base for the tweeter. There are screws and also a self-adhesive pad supplied with the speakers that could have been used. That way the tweeter would be closer to the surface of the interior.
Under the white tape is the capacitor glued (the only crossover in this kit, woofer isn't filtered). A perfect place for it.
Foolishly I trusted the wiring in the Leon to be correct and put the door panels in place. Turned out the rear speakers were in wrong phase compared to the front. Couldn't be arsed to remove the door panels again, I cut the cables to the ISO contact from the head unit and switched phase there. Damn annoying.
Don't know if the wiring to the rear doors are wrong or if the original front door speaker are connected wrong. Anyway, I recommend a phase check and not just a quick sound check.
On to a short review of Sony XS-HA1727:
Mechanical: The woofer can't be mounted in the adaptor as the screws are to small/holes to big. Tweeter won't snap into place in the door panel as supposed due to the adaptor being too small. Otherwise standard quality.
Sound: Haven't played more than a few hours which really is too soon get a fair impression. But still I'm confident that they aren't better than the original factory fitted speakers. A bit sharper than the originals in the high tones and lacks some in the mid. Possibly are the tweeters smaller as the piano sounds more from the woofers than it does on the original system. Same with voices. The original speakers sound more homogeneous. The Sony woofers have more midbass punch but less depth. The Sony system sounds to be less sensitive and also less pleasing when played quite loud.
Over all Sony XS-HA1727 aren't as good as my six years old original system as can be expected for about 70€. I can recommend them in the back doors only if the back seat isn't populated too often.
Head unit was a Panasonic CQ-C1311NW.
