Never had anything McIntosh at home, but the best car head unit I’ve ever owned (and I’ve had most!) together with the best amp for in-car were both made by McIntosh in the 1990’s.. in fact the HU was a modified Clarion unit, the amps were designed and built from scratch, but they both sound wonderful.
I had one in a Subaru from 2008.
Sounded ok but died at about 4 years old. They wanted $4000 for a replacement - even the guy in spare parts who quoted me that price was embarrassed.
I installed an alpine unit (including having to replace a chunk of console) for half that price. And it sounded better that the Clarion/ McIntosh