Play a 2channel source and then select mono preset.
With the arrow keys on the MSR select "party mode".
All speakers have to be sound equal now.
Maybe you have a test CD with (white noise) noise or a select on your analogue tuner a spot between stations so you also get some white noise.

Robert


800v3/218/271/8k.2/5k5s smile /5kC/DSP3200/Reviver/
TT-ELP/Graham Slee Revelation/Trinnov Altitude 32/OPPO 205
__Ayon/HB/Shunyata/Miltzow -- power cables,
__Ayon/Jungson/Miltzow --analog, Miltzow-- digital,
__Vortex/WMA ,