I have phase inversion switches on the rear of my Reflection Audio preamplifier and remote button for my Velodyne subs. With the subs off it's difficult to hear the differences of inverting the phase with most recordings partly because of the getting up to make the switch and my acoustic memory.
On the other hand changing the phase of the subwoofers extra low frequencies with the remote while remaining in the listening position the out of phase can be quite audible on recordings with forwardly mixed kick drums. In fact the phase can change from track to track.
On the other hand changing the phase of the subwoofers extra low frequencies with the remote while remaining in the listening position the out of phase can be quite audible on recordings with forwardly mixed kick drums. In fact the phase can change from track to track.