"Top 100 Most Influential Car Audio Products of All Time"
This article maybe of relevance for those who are nostalgic of the ol'skool ways of attempting to stuff as much audio hardware as possible in cars.
The article may also provide some retrospect for those interested in getting a historical timeline of those earlier decades.
I don't agree with most that are on the list and many others which should deserve
also-mention!
Some of the hardware on the list that I've shoehorned into a variety of vehicles include the List numbers 98, 69, 58, 54, 46, 43, 42, 36. 32, 14, 13, 12, 9, 8, 7, 6, 1
My geekiest installation was a Sony MobileES XDP-4000X PreAmp/EQ which required a serial PC (RS-232) interface to set-up. It had a copper chassis and fiber-optics to connect to a CDX-910 head-end unit.
Equalization could only be done in-vehicle but similar setup to this:
Yeah, Ol'skool was kool bak then, cirka 1998!