Using MiniDSP 2x4 to Time - Align Multiple Subs with Audyssey

Writing a clear and concise technical application isn't easy but for long time AVSForum member AustinJerry, it seems second nature! We're certainly very impressed by the amount of details and work that was documented in this very nice application note. It's by far the most complete of our Community Tutorial series and we'd like to extend our big Thanks to Jerry! Make sure you do the same. :-)

Overview

The purpose of this procedure is to outline the approach to use the MiniDSP 2x4 to time-align multiple subwoofers when using an AVR with Audyssey room correction.
The benefits of using the MiniDSP, rather than relying on Audyssey's sub correction alone are:

1.Allows time-alignment of multiple subs for AVR's with Audyssey MultEQ or MultEQ XT, which do not have two sub channels with unique level and delay settings.
2.Allows more control for time-aligning more than two subs on AVR's with Audyssey MultEQ XT32.
3.Allows experimentation with EQ'ing the sub channel prior to running Audyssey, potentially improving the final frequency response.
4.Allows implementation of the MiniDSP DDRC-88A Dirac Live, which (as of this writing) lacks support of multiple sub channels.