Latest Audio upgrade is installing the Mercury Audio components I received from @Nasty . Most have probably not heard of this brand and neither had I until Nasty brought them to my attention. The company is out of Thailand and I was a little skeptical not having heard of them however they seem to win a lot on the Asian car audio competition circuit so I figured I'd give them a try.
This time around I used the Metra 6x9 adapters lined with Sound Skins deadener, made a recessed 13mm birch mounting plate to flush mount the mids and sealed front and back with foam weather stripping. Tweeters are installed in the stock dash location surrounded by thick foam.
Build quality as well as packaging are excellent IMO and I have about 25 hours of break in time so they are pretty well loosened up now. System is factory iob 7" headunit and JL Audio twk88 dsp running these active through a JL audio xd700/5v2 5 channel amplifier.
It was hard to find info online (the translated video I watched was difficult to follow with the thick accent of the narrator) and no manual or specs so I was basically flying by the seat of my pants. After much experimenting with crossover points along with basic phase/level adjustments and no eq'ing yet I find these to be an excellent sounding set of speakers "right out of the box". Midrange is very natural sounding as I like it, midbass is very articulate and easily keeps up with the fastest bass lines, soft dome tweeters are very detailed without any harshness even firing off the windshield and I'm sure they will be even better once I fine tune. I like them better than the highly regarded Alpine SPX PRO's I previously had installed and IMO they can compare favorably with many of the upper end speakers found on the market here as well as several "boutique" brands I have used.