My buddy Mike had Mindblowers I helped him install in the rear deck of his '73 Mustang coupe. Wired up to a Pioneer Supertuner 8-track they sounded... loud. Mostly on Foghat, REO, Styx, Seger and the rock of the late '70s. I had a VW Rabbit, Jensen 6x9 Co-Ax on the flimsy rear deck cover and 5x7 Jensen 2-ways hacked into the front doors. A Blaupunkt cassette receiver and a Rockford Fosgate 40W x2 Amp that blew fuses constantly. It too was loud, maybe a bit more accurate than the Mustang, probably due to the superior cassette player. Either way, great times and who cares what they sounded like, we we're 16, close to the beach with a cooler full of Miller in the glass bottle. All was fine.