all i have to say is Memphis kicks ***!! i recently just purchased the studio class 1000D and man, i love this thing. its D class so it doesn't heat up as quick, nor dim my lights as my old amp, as opposed to my old amp, but can anyone tell me wat subsonic filter is? thanks!

 

Subsonic filter blocks frequencies that are too low for the human ear to hear. Most people hear from 20 Hz to 20,000 Hz. It probably blocks anything less than 15 or 20 Hz. It reduces distortion caused by the sub playing tones that are too low for you to hear anyways.

 

thanks alot man

 

And can prevent the destruction of your sub below tuning frequency if you are ported.