So I got up with Dave about making me a cool passive radiator... why, you might ask ? Well... first, I don't make passive radiators. Second... Dave does and he does good work. Third... fitting a port in the box for one SA-8 is a chore and very often not practical. So... the solution is a PR of course ! Dave can make these for other applications as well -- check them out at PSI Car Audio. On the the photos : * Adjustable mass for even lower tuning... we expect to be in the mid 30s with stock mass on this PR. The PR really looks great -- Dave's usual high quality work. I'll get pictures and data up once I have time to make the box. This may become an officially suggested product for usage with SA-8s if it works as well as I think it will!