Bobby,
Thanks for your kind offer, but there is not much technical info available that I know of for the OHM SBA other than some tidbits on the OHM site that describes what it does for the listener with specific speaker models in very general terms.
The SBA is a circuit board that inserts inline between crossover and woofer and provides a combo tailored boost and filter there as I understand it.
The kit also comes with a port adapter that you insert into the built-in port to tune it to a somewhat lower frequency, I believe.
OHM sells this as a low end enhancement for most every speak they've ever sold, both conventional and Walsh, plus use it in most all newer speaks out of the factory as well, I believe. There have been dozens of models of OHM speakers sold over the 30-40 years they've been around I'd say. The kit cost me ~$70 dollars for a pair of OHM Ls that listed for about $500 new 30 years ago.
I suspect the exact technical specs of the SBA device might well vary by model in terms of the boost, filtering and frequency the port adaptor is designed to tune the specific model to, but I do not know this for fact.