Anyone heard Shahinian Contra Bombarde Subwoofer

Just Curious. Being a Shahinian fan I was curious of listener impressions. It is a very rare item so not many listeners out there. One is for sale now on Ebay. I was under the impression that Shahinian stopped making them because they were so expensive to make. I guess the internal cabinetry is complex. I know Richard Shahinian commented it would be irritating to neighbors as it has such low response (flat to 17Hz).