My favorite front-end in the early eighties was Concorde. I built some very nice sound systems in my cars using Concorde cassette/receivers and Alpine amps. I always ran JBL Professional Series components, as many of you might expect. One of my favorites was the 2115 - an 8" unit that was good down to 20Hz.

But I'm pretty sure my stuff wasn't as loud as that wild "Hell Van" of yours. Wow!