Revel LFO - Manual (Page 24)

24 LFO Programming Software
User Guide
ADJUSTING SUBWOOFER POLARITY
The polarity setting determines if the subwoofer's cone moves towards the room when the subwoofer receives a positive voltage (Normal) or moves away
from the room when the subwoofer receives a positive voltage (Inverted).
The audible effect of the subwoofer's polarity setting will depend on a number of factors, including the listening room's size and layout, the listening
position, the locations of the subwoofer, the locations of the system's other speakers within the room and the locations of the speakers and subwoofer(s)
relative to one another. The setting typically affects the system's performance in the region where the subwoofer crosses-over to the system's other
speakers.
While you have your measurement equipment set up you can repeat the measurement process (see Measuring Your System, on page 12) with the
subwoofer's polarity set to Normal, then again with it set to Inverted and compare the results. Use the setting that produces a fl atter response curve.
NOTE: Make sure the test noise plays through all of your system's speakers, not just the subwoofer, when comparing the polarity control settings.
Polarity
Normal
Region Affected by
Polarity Adjustment
Polarity
Inverted
In the example above the Normal setting produces fl atter results; in another system the Inverted setting may produce fl atter results or there may be little
difference between the two settings.
IMPORTANT: In systems with multiple subwoofers you must set the polarity adjustment the same for all the subwoofers in the system.