SubFilterII is an expanded version of the original SubFilter plug-in with a wider range of cutoff frequencies. SubFilterII has a selectable cutoff slope of -12, -24 or -36dB/Octave and a cutoff frequency variable from 10Hz to 1KHz. The filter is extremely useful for removing thumps, bumps and low frequency rumble noise from your audio. The filter has 2 controls: cutoff slope and cutoff frequency. The passband is flat (Butterworth filter) and has unity gain. In addition to audio cleanup tasks, SubFilterII can be used with HyperFilter to create "am radio", "megaphone" and other classic sounds.