Mystery side-firing speaker - Acoustic Dimensions?


I "found" a pair of old odd-ball speakers called Acoustic Dimensions - probably circa 1980ish. 3 feet tall, 10 inches deep and wide - square GLASS top. Has a 2 inch tweeter on front and also right and left. That's right - tweeters on THREE sides- 8-in woofer in front.

Anyone have a clue as to the what/where/why of speaker?

(Is it just me or do a lot of people leave perfectly good speakers by the side of the road for weird audiogoners to "discover"?)
gdoodle
True - the list of stuff I've found at the side of the road is quite long and impressive (except to the spouse). Mostly speakers but some components too. I actually lugged these babies out to the street last weekend to get them out of the garage- lots of gawkers came and kicked the tires but no takers (missing one woofer) so I schlepped them back in the garage.

But this is one item that I just can't figure out - can't tell what its worth or what the company is. will probably end up by the pool, sound reinforcement for the other 4 pairs of speakers out there in the yard already.
Don't know about your discovery, but I've found people either discard or sell cheap at garage sales some real audiophile-quality gems because they've replaced them with
'home theater in-a box" systems, or, in the case of this past weekend I bought for $20. a pair of Infinity RS6s and Yamaha integrated amp that my neighbor replaced with a Bose Wave Radio.
There's some very good equipment out there being discarded for up-to-date junk.