Setting the sub x-over too high so that the sat/sub overlaps too much may make it easier to hear the changes in output when changing the phase. When you get the most output your sub is matching the sats. Then back down the sub x-over to its best blend. It helps to have someone listen out in the room as it can be tricky to judge when you are right on top of the sub.
How do you use subwoofer phase control ?
Recently obtained 1986 era Duntech Thor powered large bench-sized subwoofers with outboard crossover box. No instructions about dialing in the phase somewhere between 0 to 180 degrees. What does one do to choose an optimum setting? Is one sub adjusted separately, and then later the second if allocating one sub per channel? May simply be using one of the subs equidistant between stereo Duntech wall mounted speakers as room size dictates due to massive "coffin" appearance of each sub. These subs specifically designed to complement these wall mounted speakers. Quite a contrast from the modern micro-sized subwoofers such as a Carver.
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