Not very efficient, will take big power for long periods of time, they do well in small ported boxes. If you don't have big power and have the space for a bigger box you will probably do better with the mayhem from AA. Lenny did our kaos class which is 3 min straight on music averaging like a 159.5 or there abouts. Not many subs can take that heat that long.
2013 and 2011 Midwest SPL Extreme Trunk Champ
94 Honda Accord
Two DD 9915 SC front firing out of the trunk
2 DD M4a's
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