Adjustable from 0 to 50ms in 0.25ms increments. This feature comes in handy when you have several subwoofers in the setup and want to combine them on a single output from your source, so that they have the same delay.
We recommend measuring the distance to the subwoofer furthest away and adding delay to the remaining subwoofer(s) so that their delay is equal to the difference in distance between it and the furthest away subwoofer.
Example:
2 subwoofers in the same room, one subwoofer is placed 4 meters away from the listening position, and the other is placed 3 meters away. The difference in distance in this example is 1 meter. So you want to delay the signal to the closest subwoofer by 1 meter (1 / 343 * 1000 = 2,915 ms). So in this case the closest setting will be 3ms.
Formula:
Meters / Speed of sound (343 m/s in room temperature) * 1000 = time in ms. Feet / Speed of sound (1125 f/s in room temperature) * 1000 = time in ms.
This article will also enlighten the topic: Calibrating Multiple Subwoofers