Just finished first portion of my 2014 F150 Supercab Sony sound system upgrade, so this might be of interest
Made 1/2" thick MDF speaker mounting panels (6x8" --> 5-1/4" adaptor plates actually)
12x12 piece of Dynamat Extreme glued onto the inside of each outer door skin
Replaced 7 speakers with:
M+M 5-1/4" front mid bass door drivers
Pioneer titanium 1" A pillar tweeters with 12db/oct passive crossovers
JBL 5-1/4" coax in the rear doors
Biggest mod was converting the 3-1/2" dash mounted center channel speaker over to a M+M 5-1/4" coax full range.
Filled the 8" sub box with polyester pillow stuffing
Tried various phasing scenarios between the speakers
Results:
Center channel upgrade made the largest noticeable difference, adding a ton of front stage and nearly doubling the perceived bass output!
The other speakers improved the sonic quality noticeably, but will require more power in order to capitalize on their capabilities.
The subwoofer reaches down one more octave but is still too quiet, especially when compared to the OEM Alpine system in the Ram trucks.
Since I had all this product in my tickle trunk, it was a free mod, other than the app 12 hrs of time it took to do all this. I used Metra speaker harness adaptors in the doors, unfortunately the third pair did NOT work on the front tweeters or on the center channel, as those use unique connectors.
Next up:
1) Passive 8" DVC Bazooka tube to replace the OEM sub temporarily using the Sony OEM amp.
then
2) Cerwin Vega high end line level converter to grab a summed and normalized analog RCA signal to feed Audio Control or Pioneer crossovers/eqs and some serious amplification.
3) Real subwoofer cabinet, likely with several 10" or 12" Dr. Crankenstein or JL Audio subs.
No pics, as Tiny Pics is full. Will try to add later on.