Why do some brands knowinly under-rate subs?

Amazing how the subject gets so heated in just 2 pages.... :-/

If you underrate your subs, you help protect the company from idiots like stated above. Either overloading a sub thermally (by RMS or by clipping) or mechanically (RMS or poor box design).

Only way to really predict how a sub will respond is to look at the curve in various box designs. If you want a smooth output across a wide range, its gotta be tuned pretty close to 28hz or the Fs of the driver for SQ.

Too many tricks for SPL, completely different game...

 
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