Bob Ps van was loud. It only played like 40hz and up loud though and blew a sub every time he played. Just way too much power and a box not designed to play music. It was a burp van and be just happened to play music on it. Was loud when he played it though.
And yeah, my 6 15s did just squeeze out a 150.1 sealed up at like 38hz. Wasn't bad for no wall, a single yellow top, and 3 cheap Hifonics amps that did maybe 1200w each.