Magnepan CCR - Manual (Page 8)

Intentionally reverse the phase on the CCR. In some cases, especially if the
CCR is not equal-distance to the front left/right speakers, the frequencies
between approximately 100-200 Hz may increase with the phase reversed and
it will be necessary to operate the CCR in an electrically out-of-phase
condition.
Further bass and midbass adjustments can be made to give the illusion of a
large Magneplanar in the middle by fine-tuning the crossover point of the
CCR and by level adjustments relative to the level of the left/right Maggies.
The Magnepan Test DVD (which is included with your speaker) provides
wide-band center channel pink noise, but without the use of a real-time
analyzer, most consumers may wonder if the pink noise has the proper balance
from bass to mids to highs. However, by playing pink noise through one of the
large left/right Maggies, a listener can hear what pink noise should sound like
and then use that sound to compare to the pink noise from the CCR to judge if
the balance is correct. An instant A-B test can be conducted by switching the
processor from "no center" channel speaker to "small center" channel. In the
"no center" mode, you will hear the pink noise through your "large" left/right
Maggies and this can be compared to the pink noise from the CCR. When the
CCR is playing the pink noise, put your ear next to both the left/right speakers
to confirm that the "large" speakers are producing the bass for the center
channel pink noise. To make an accurate comparison, when listening to the
pink noise through the left/right speakers, it is necessary to disconnect one of
the left/right speakers. Obviously, two speakers playing pink noise will not
sound the same as one speaker. The speaker will have to be reconnected when
the CCR is evaluated with pink noise.
If you are having trouble getting similar pink noise sound from the CCR as
compared to the large left/right Maggies, the problem might be the level
setting (with respect to the left/right speakers), or the crossover setting and the
phasing between the CCR and the left/right speakers. Turn the subwoofer "off "
for the purposes of this test to allow concentration on creating a "large" Maggie
in the middle. Keep in mind that due to the fact that center channel speakers
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