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Copyright© 2011 Octet Matrix Audio
5) Track 3 is a phase verification track to confirm that speaker to speaker phase is
correct. To use this track effectively, you should be centered between the speakers
and 3' - 5' away. The track alternates several times between the spoken phrase “In
phase” followed by pink noise played in phase, and “out of phase” followed by pink
noise played out of phase. Both the voice introduction and the pink noise will be
either in phase or out of phase.
6) When everything is set up correctly, you should hear:
a. In Phase - the voice and the pink noise will have a clearly defined point of
origin centered between the speakers.
b. Out of Phase - the voice and pink noise will have no clearly defined origin and
may even sound as if the sound originates outside of the speakers.
c. There will also be a distinct difference in bass levels with the pink noise. The
pink noise will sound fuller (more bass) when in phase, and thinner (less bass)
when out of phase.
7) If you hear the opposite effects, check the wiring into the DWT4416 transmitter. In
some cases, the equipment setup or environment can cause confusing results. If the
wiring seems correct, try moving your listening position towards the speakers and
move slightly to one side of center, listen, and then move slightly to the other side of
center and listen. If you still don’t hear what you think you ought to, try reversing only
the left DWT4416 input wire polarity and perform the phase test again.
Dynamic Range Optimization
1) Using one of the techniques found in the Maximum System Level section, determine
the loudest usable system level. If you have several sources (CD player and DVD
player, for example), you must use the source with the highest analog output for a
given signal. See the section titled Highest Output Source for the procedure to
determine which source has the highest output.
2) Set the DWT4416 volume control to the 9:00 position.
3) Confirm that both DE5B-DW50 volume controls are at the 12:00 position.
4) Disconnect all other speakers and set the Main System Volume control to the
Maximum System Level determined in step 1.
5) Place the Octet Matrix Audio test CD into the source selected in step 1 and select track
5 (or select the 0 dBFS track copied to MP3 player, iPod, iPhone, etc).
6) Adjust DWT4416 volume control up until you hear distortion. The onset of distortion
will be obvious, with a clear transition point. Back the DWT4416 volume control off
slightly until the distortion disappears. This setting should not have to be changed
again unless system component changes are made.
