Best Car Stereo

In Dash TV’s, Home/Car Theater – Sony, Alpine, Eclipse, Panasonic Head units new- Nakamichi in dash 6-disc changer (Single din head unit), great dac. Old Audiophile Head units Alpine 7909, Sony RMS2001 Amps - Adcom, Alpine, Phoenix Gold, ADS, Milbert Tubes, PPI. Speakers ADS, MB Quart, Boston Acoustic Pro series, Focal, Speaker Craft Subs- JL Audio, Velodyne, Boston Acoustic Pro Series.

I love to listen to the standard Bose equipment on my Mercedes 4x4 to remind myself of the crap that most people are listening to courtesy of lies and advertising and reinforce my unwavering commitment to achieve better sound. Just kidding (partly). I hope to pull that crap out of an otherwise excellent car and replace it with something reasonable. I am tired of the bloated midbass and compressed highs of the Bose.

Precision Power in Pheonix is regarded as one of the best. They produce an automotive tube amp. Their speaker line is built for them in Germany.

Check out some of the HCCA stuff by Orion, WOW!

So much good quality car audio gear out there. I have used JL Audio for sub amplifier duties, and Audison (of Italy) for the front splits.
Not mentioned is in car DSP, I have owned the Audison and JBL-MS8, there are newer ones out now that I would guess are better yet again?

JL Audio make time alignment amplifiers as do others.
https://www.crutchfield.com/shopsearch/dsp_for_car_audio.html?&pg=2

The older MS8 for example will integrate with even factory head units on newer cars and can be used to do time alignment and full active crossover duties.
They are supplied with stereo microphones, that measure in milliseconds the time for white noise to travel from each drivers programmed to each ear of the person who's wearing the microphone head set. This is done to setup the car in less than thirty minutes. It measures frequency response in the vehicle and EQ's to that specific profile. You can select for different listening positions in the car even, and there's also manual equalization as well.

I have a pair of Vifa soft dome tweeters (off Ebay and branded with Aston Martin), Dynaudio (mids) and Tymphany LAT-500 (sub). There's 8 discreet channels on the MS8 all entirely configurable, low pass, high pass and band pass.

Instead of mounting everything in the bottom of the trunk (boot) I had a light square tube steel rack welded up with tabs to bolt the amps, capacitors, fuses, and DSP and used rubber mounts to secure it under the rear parcel shelf above the trunk area. Kept everything cool, safe and the trunk (boot) completely usable still.