There are several companies that make single driver/no crossover speakers. Lothar is one of the more well known design, but I don't know the specific company to which you refer. Most of these models are not portable, but people who like them, like them a LOT!
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You must be thinking of the Sound Bug, which has been out a few years. Much longer than the Sonic Impact version. It's also portable and can be set up temporarily versus the permanent only SI.
I've never heard one in person, but I've heard many people who've had them call it a low-fidelity system at best.