Alto Professional Live Drive App - Manual (Page 16)

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80 Hz, 100 Hz, 120 Hz, 140 Hz
(subwoofers only): Adjusts the low-
pass crossover setting. For most
applications, we recommend using the
80 Hz or 100 Hz setting. Use the 120 Hz or 140
Hz settings to increase mid-bass impact.
Custom: Applies your custom DSP
mode, set in Live Drive's EQ Page.
Polarity (subwoofers only):
Toggles the polarity of the
subwoofer's acoustic output. In some cases,
reversing the polarity can help reduce any
interference in the frequency overlap between a
subwoofer and loudspeaker. This can also be a
useful feature when time-aligning multiple
loudspeakers and/or subwoofers. When the
button is off, the subwoofer is set to its default
positive polarity (the recommended setting).
Important: When using multiple Black Series
subwoofers, make sure they are set to the same
polarity to avoid cancellation of the bass
frequencies.