A friend bought a pair of 18" woofers, we mounted one to a board and placed it in front of the clothes dryer, with the door open to use it as a cabinet. The bass really shook the house! He latter sold them to a local musician, they were better suited as musical instrument speakers rather than as hifi ones.
Crazy memories your bringing back. In the early 70's it seemed everyone I knew either wanted to be a musician or wanted the best audio gear to listen to music. The term "best" is pretty flexible for back then and certainly experimental.
A friend worked at McGee Electronics here in town which, along with Burstein-Applbee made spontaneous audio purchases quite easy. So this friend took 2, 55 gallon cardboard drums like this:
& made the quickest & dirtiest speaker enclosure you can imagine out of them. He simply cut out the lid to fit (I think) a 15" woofer in the lid. He used some sorta compression horn mid-range/ tweeter mounted above the top of the drum. The woofer faced up, the tweeter straight ahead.
Like your clothes dryer woofer this combination of large volume & no damping made for a huge amount of mid-bass. I was really impressed, novice listener that we all were back then. I mean that baby BOOMED!
Ironically I bought some Empire Jupiter speakers a few years later that looked like giant salt & pepper shakers. They were cylindrical, and the woofer was on the bottom pointed straight down at the base stand. Mid & tweet conventionally faced forward. Now that I type this, it makes me wonder if my old friend ever worked & Empire & created this design...
And who hasn't listned to Whole Lotta Love through a Fender amp cranked sky high? It seemed so right back then, the logic of playing back music through equipment that it was originally intended for.