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explanation of bass extension?

post #1 of 3
Thread Starter 
Just curious, what does it mean when a sub has a maximum extension down to a certain hz? i understand the lower the better, but does it mean that the sub pays to a relatively flat frequency response to that range or does it stop providing sound below that frequency?
post #2 of 3
What you are referring to here are subs that have variable tuning. They may be tuned for either maximum extension to be able to play deeper at the expense of overall output or they can be tuned for maximum output which would go less deep, but would play louder. Certain HSU, SVS, and a few other are made to do this.
post #3 of 3
Quote:
Originally Posted by nezz621 View Post

Just curious, what does it mean when a sub has a maximum extension down to a certain hz? i understand the lower the better, but does it mean that the sub pays to a relatively flat frequency response to that range or does it stop providing sound below that frequency?

Max. bass extension refers to the lowest frequency a subwoofer can produce below it's tuning point without significant distortion/compression. A sub may provide a flat response down to 25hz lets say, but can extend down to 20hz without giving up a significant amount of output or distortion. It all depends on how steep the slope is below the tuning frequency. According to Tom Nousaine most subs he has tested will extend anywhere from 2 to as much as 10hz below their tuning range.

Ian
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