Wanted to share my newly installed system. Goal was to have everything hidden, retain all OEM functionality, and provide excellent SQ. I started with a 2017 Platinum with Sony 12 Speaker Audio.
PAC AmpPro
Audison Bit Nove
JL Audio XD600/6v2
Hertz Mille Legend MLK 165.3 components for the fronts
Hertz Mille Pro MPX 165.3 coaxials for the rears
JL Audio XD600/1v2
JL Audio Stealthbox with 10W3v3
The PAC AmpPro is a fantastic product and really the only way to go in these cars. There is no practical way to get better flat signal than using one of these. De-EQ'ing the high level signals coming from the Sony amp is a crapshoot. This is the only way of ensuring you're getting a true flat signal.
The Bit Nove has been awesome so far, although we're still trying to hunt down some hiss and whine. I'm having the shop try out grounding straight to the battery to see fi that helps, but with the CV19 foolishness going on they're having trouble keeping installers in the bay.
I can't say enough about the Mille Legends. I've tried them with no low pass filter and the sub disabled and I can confidently say that you wouldn't be disappointed if you were in a position to not want a subwoofer for whatever reason.
Speaking of subwoofers, JL Audio did a hell of a job with this generation's Stealthbox. The key is going to making sure that it is SECURELY mounted. And you're going to have to sound deaden both the inside of the quarter panel and the backside of the interior trim panel. It will buzz at the top near the rear window so apply material every square inch all the way up the side. My only gripe with the Stealthbox is that the OEM black that it comes in is actually more of a dark grey and doesn't match the interior carpet and trim 100% but it doesn't look terribly out of place.
The XD600/6v2 running the fronts and rears is installed under the driver seat. The Audison and the XD600/1v2 are installed side by side under the front passenger seat. There's plenty of room down there for the gear and all the wiring. To protect them from wet shoes, I have Husky Liners all the way around and they provide some protection from slinging moisture without compromising airflow. I feel it's perfectly adequate given that I rarely experience snow or slush that would cause a problem. All of the gear panels are accessible my moving the seat back or front and the USB port for the Audison is easily reached from behind the front passenger seat.
We're still working on the finishing touches for tuning. The biggest thing I have to get done is disconnecting the center channel. It totally ruins the sound imaging. You basically can't TA the Audison until you do this. What you'll have to know going in is that if you disconnect all the front speakers (L,R, and C), you need to disconnect the battery, let the CANBUS die, and do a reset procedure on the PAC. PAC assures me once you do that the PAC will handle all chimes, parking detectors, and SYNC audio (BT, NAV). I haven't tried it yet so I'll post back if this doesn't work. If you don't disconnect the center channel, phone calls will only come through the center channel and your audio will kind of dance around while the parking sensors are going as the center channel mutes and unmutes at a different time than the aftermarket amps.
I also had them disconnect the third row speakers, but be advised when you do this, you won't get a chime when you close the hatch. I'm going to have the reconnect these speakers because they aren't affected the front seat audio that much and I want the chime.
If anybody wants pictures, I can upload some.