[Josuah]

I guess you're just running them really loud. I've got a pair of 16-46PC+ subs, separately placed so I guess +3dB from doubling up. And I've only bottomed them out when trying to, not from any content. I sit about 11' away from the center of their drivers, room is >5000ft^3 open to the rest of the house. Bottom out will happen at absolute levels 105dB <20Hz, 110dB > 20Hz at my listening position, which means I can run at -10dB reference max.

What is the max SPL you can hit at your listening position with the two 20-39PC+ subs?