Near Full Range, Highly efficient Stand Monitors?

Okay just curious, who builds a very efficient, maybe 95 db or better monitor/bookshelf type speaker, maybe with at least an 8" driver that goes reasonably deep into the 30 hz ranges?
Seems most would be rated around only 45 hz or up, most single driver designs in a small cabinet even vented would not go very low.. Anything? Even down to about 38 hz or so with a stable 8 ohm load, having some actual bass output?

Thanks