Dolby
®
Model CP650 Installation Manual
B-Chain Alignment
4-22
Saving Changes.....
...
OK
When the desired response for this channel has
been achieved, press the right-hand
OK
button to
save the settings.
L, R, and Ls, Rs
or
L, R, Ls, Bsl, Bsr, Rs
Press the left menu button once, then move the
front-panel knob to select the next channel to be
equalized. Repeat the above procedure for the
remaining full-range channels.
4.7.4
The EQ Assist Feature
Figure 4–4
EQ Assist Operating Range
The EQ Assist function automatically adjusts the B-chain EQ levels in 22 bands,
attempting to bring the spectrum of the audio in the auditorium in alignment with the
standard response curve.
Course (bulk) EQ must be performed before activating
EQ Assist. (See Section 4.7.2.)
Activate EQ Assist by rotating the front-panel knob clockwise to move the blinking
cursor up to the 16 kHz band. Keep spinning the knob clockwise. When the cursor
stops blinking, EQ Assist is active and no further changes are allowed while it
operates. You will see the levels moving, and hear the audio in the auditorium
changing as the EQ Assist operates. When the cursor begins blinking again (after
approximately eight seconds) EQ Assist has finished.
It is important to note that the lowest three bands of the graphic equalizer (40, 50, and
63 Hz) and the uppermost two bands (12.5 and 16 kHz) will not be adjusted. This is
to protect the speakers against undesirable level boosts in those bands. Set these
bands manually then verify that the overall equalization is satisfactory.
