Hey all, I've had a Tesla Model S for a year and a half now with the stock sound system (4 decent full range speakers in the doors, 2 tweeters in the front pillars and a mid range speaker in the mid dash) and I decided to take the plunge to upgrade the sound. First step is getting a sub, I'm having a local shop in Burlingame put in a JL Audio MicroSub 10" ported amplified subwoofer into a hidden compartment in the back (where 3rd row seats would install but I don't have kids). That's something I'm willing to pay for, since I don't wanna mess with tearing down most of my car myself (no experience working on cars aside from changing oil).

Now, since it's a Tesla I know I'm getting gouged by people when I ask how much to do a full system, I've gotten estimates between $2900-3500 out the door for sub, amp and component speakers. I got my girlfriend's Focus hatchback done for half that and I'm pretty sure I overpaid there too. Anyway, the point is, I don't wanna pay out the ass for a sound system in my car (I already paid out the ass on the car itself) so I want an upgrade that's manageable to do on my own, but only if it's going to give me a noticeable improvement.

So first question is, is it worth it to swap out stock speakers (which are decent to good) for higher quality coax speakers without swapping the amp? Based on the info I've gotten from reading around (link below), the speaker size and housing from Tesla is custom (6.25" with a 2.5" mounting depth, though the guide below fit 6.5" Focals @ 2 5/8" deep), and it runs 2 ohms, which probably limits my choices.

Second question is, if it's worth it, can anyone help me pick parts that will work with my setup? Aside from the speakers and wire, I'd need help figuring out what I need to mount it where the original speakers went, and it also looks like there's a special 2 pin wire plug/harness that I'd want to plug in to. I don't want to cut the wires in case I need to go back to factory. There's a place called Light Harmonic doing custom speakers that are built specifically for the Tesla with the connectors and everything, but they were supposed to ship this month but I think they're pushing it back to next month, and aside from that they're running $1k for 4 speakers. That being said, the factory speakers aren't half bad, so if that's the kind of price I'd have to look at paying for an upgrade to the sound quality, then that might not be a bad choice later on down the road.

Thanks in advance for suggestions! The guide where I found speaker specs and installation guide is linked below:

https://teslatap.com/modifications/upgrading-rear-door-speakers/