If you are going to do an audio overhaul on your Jeep I recommend you switch out your old head-unit with a new one that has Bluetooth instead and an amp hooked up to it. Also look for a head-unit that has enough RCA outputs in order to correspond to the amount of audio outputs you will need. Also pony up for a higher quality head unit that has lower levels of distortion. This is because you want the audio source to be as clear as possible. That is why I went with Kenwood's Exelon series because of it's clearer source audio with low distortion at higher volumes. This is all the major audio equipment I am running in my TJ:
Mids and Highs:
Pioneer GM-DX874 Amp hooked up to 4
Polk Audio DB 522 5.25" Speakers, these are running at 100 watts RMS per speaker, it is safe to say that they get a bit loud. Also another nice thing about these Polks is that they are marine grade speakers.
Lows:
JL Audio JD500/1 Amp hooked up to 2
10" Rockford Fosgate Prime Subwoofers. These are running at a factory rated 500 watts RMS, but Rockford Fosgate and JL underrate their specs so it is running at around 600 RMS. I also ran a similar
Rockford Fosgate R2-500X1 amp with these subwoofers with identical results. I only switched because I found the JL amp on sale and preferred its tuning settings but they are both equally good amps. The Rockford Fosgate amp comes with a "birth sheet" that is unique to each amp because their output is tested after manufacturing. My specific birth sheet stated that it had a 611 watts RMS output under a 2 ohm load. Results may vary from amp to amp but most people get ~600 watts RMS on these amps. The 2 10" Rockford Fosgate subwoofers take that power no problem. Also these subwoofers were the only subwoofers at the audio shop that would fit in my small TJ trunk (excluding the smaller single subwoofer enclosures).
Head-Unit:
I chose the
Kenwood Excelon KDC-X704 as my head-unit of choice because it outputs good audio quality, and was okay to listen to without an amp at it's 22 RMS but wasn't knock your socks off without an amp. It includes Alexa, hands free calling, Spotify compatibility, and a bunch of other novelties. One of my most sought after functions that this head-unit includes is, being able to take off the faceplate in order to give you peace of mind when parking it in a not so nice area with no doors and/or top.
This is a complete audio overhaul that isn't necessary, but sure is fun and loud. Do note that this audio system does not sound as good in a Jeep because of the terrible acoustics, but sure is still fun. I was able to run my friend's 2 12" JL subwoofers
JL Audio CP212-W0v3 on the rear seats in my Jeep because we use the same amp in our setups and although it still sets off car alarms, it does still sound better in a car with doors and no soft top. Also I mounted my amps under my rear bench and they fit just right under there and I can easily access them by folding the rear bench forward.