I have an 802A w/ Sony sound, super crew. I went the path of someone who blazed the trail before me: 2015 Subwoofer Mod - Page 2 - F150online Forums The amp was ~$89 and the sub was under $120 on amazon, and these may not even be the best prices out there. That Kenwood amp is small, about the size of an iPad mini, about 1.75” thick? This particular sub has been superseded by Kicker, and the new one is a Kicker CompRT 43CWRT81. Others may work, but if re-tasking the factory Sony box, you need a shallow depth sub. I did tap power from the inverter like the original poster, but will tap power from the battery as time permits. The install really was not that bad, however I did check out a power run to the battery, briefly and I’m going to have to come back to that. My initial tests were positive, but at 100% I can hear some noise at the sub that sounds like ‘fluttering’? so i backed down the input about 1/5th turn and I believe I have it where I want. It looks to me like there’s room for more back there and I’d love to have a 10” back there because I could stand about 25-40 % more bass. I’m not into heavy bass rap, but bass is the underpinning of a good sounding stereo. For some context, I think it would be fair to classify me as a “bass enthusiast”. My TV is wired to my home stereo, with a 10” sub and 5.1 system. In Jurassic park when the show the iconic shaking glass of water, I can do that on my living room table. This setup goes a good way towards that and still retains your under seat storage, fold up the seats and can still use the whole floor. I really thought 300w would overpower the factory stereo. Nope. I’d definitely opt for more power / bass, but not over the top. I have a mix of music on my iPhone from 70’s rock, through present day. I like rock, blues, some jazz, some big-band, Motown, some modern country... you get the idea. So I tried a few songs out with good results. It’s a long way to the top: great. Def Leppard; Photograph: great. One bourbon, one scotch, one beer - had to turn the input down just a touch. Foreplay/Long time: sounded great. After Midnight/Just one Night(the beer commercial version): could take just a little more bass. Woke up This Morning (The Sopranos theme song) - big, big improvement. So, after buttoning things up for the first outing, I headed out and at the first light auto stop did not engage. I suspected it might not, and checked and the truck indicated battery charge as the reason. Don’t get your hopes up - after I’d driven a few miles, the next light and all others after, it worked. So, with just the factory stereo, new amp and sub, it’s definitely an improvement. Now, when the The Car Stereo Company comes out with some stuff, pay attention. ( I’m not affiliated with them, nor am I even a customer [yet] but they are a supporting vendor willing to help us out) There’s pictures in the thread linked above, and I didn’t do anything groundbreaking here, but I can grab some pics if needed.