Gathering of the clan....
The whole system. Blast furnace plus two buddies.
The Blast furnace has one port blanked off to lower the tuning to 18hz. The buddies will tuck away behind the seating position in a desperate attempt to increase the SAF (Spouse Acceptance Factor).
I later remove the blanking plug to recover the lost SPL - there is still plenty of "bottom end" to go round!
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