Great review!
I understand the original Sonab company went out of business when the management made some bad investment decisions, but Stig managed to struggle back with a new company called 'Carlsson' that produced the last of the OA series like the model 50 and 51.
But (in the UK at least) they never had an easy ride from the press, who didn't understand what the designs were trying to achieve.
At that time (late 70's - 80's) the mantra was 'source first' and the enthusiast was constantly lectured to spend the bulk of their budget on the turntable with the amp and speakers being mere afterthoughts. I clearly remember one journal advising a system based around a Linn Sondeck turntable, Ittok arm and Troica cart with a relatively puny NAD 3020 amp and tiny Wharfedale Diamond speakers. Over 96% of the budget on the record deck! Man, they were strange times...
According to the UK magazines at that time, 'acceptable' speakers were simple front firing 2-way designs with 8" woofers, placed on stands -
or else. It wasn't exactly a conducive selling environment for a relatively expensive speaker with several drivers that fired up at the ceiling!
In addition the few press articles that Sonab did get tended to be dismissive or carried out by reviewers who couldn't RTFM. The speakers were usually badly positioned the wrong way round (woofer out) or away from the wall. In one jaw-droppingly incompetent review they were placed away from the wall, on stands firing forwards like a conventional design.
It's really a wonder Sonab sold any speakers in the UK at all!
But has it not always been thus? Any speaker company whose designs deviate from the accepted norm is in for a rough ride. There are a few still out there plugging away (Shahinian and Duevel come to mind) but they tend to be expensive and hard to find.
Maybe someday a reasonably priced mass-market product will come our way, but in the meantime we have to seek out the vintage designs!