Thanks, Craig. I have been looking at the Lab12 drivers in a pair of dual sealed cabs based on your recommendation.

I had been looking at a pair of the Tymphany STW350F as well with a 3KW amp. I am still in the process of deciding what will make the most sense in terms of total clean displacement.

The Lab12s are tough to beat for the price it seems. People really seem to like them. It looks like their low end may be on the light side without an enclosure to augment it. I would likely throw out 20db on the high end to meet the low end if necessary. But it wouldn't matter with 4...

I would estimate 4 of them within a 1/4 wavelength distance of 20hz would boost their output to the lowest octave considerably. Maybe 9 db at 20hz or so as a guess.

Thanks, Brendo. I'm not sure I really want to mess with used gear or deal with independent sellers through FB. Great idea though.