It might be worth doing a Google image search on "Kustom amp" or kustom amp head".
It was a combo, small & low wattage, with a speaker no bigger than 10", probably 8". Google Images didn't show the amp I recall. Perhaps my perception of "rectangular & deep" is off, but at the time the design is what caught my eye and made me decide to try it. It had a tight & punchy sound rather than a deep rumble.
