Installation manual

Dolby

Model CP650 Installation Manual B-Chain Alignment

4-23

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Subwoofer EQSubwoofer EQ

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>Frequency: xx Hz

Q: x.x

Cut: - xx.x dB

4.7.5 Setting Subwoofer Channel EQ

Press the left menu button twice to move to the

Subwoofer EQ screen.

Equalization facilities for the subwoofer channel

are different than for the other channels. This

process is designed to correct the principal room

resonance in the operating range of the subwoofer.

The subwoofer equalizer is a cut-only filter, with

adjustable frequency (25 to 125 Hz), Q (center

width, selectable between four values), and

amount of cut (0 to 12 dB). There is no standard

curve displayed for this function.

The center menu button is used to select

Frequency, Q, or Cut, then the main fader knob

to change the setting.

Q = 2.0

Press the center menu button to move the cursor

to Q:, then rotate the front-panel knob to set

Q to 2.0.

This will produce a moderately wide notch.

Cut = 0.0 dB

Press the center menu button, moving the cursor

to Cut:, then rotate the front-panel knob setting

cut to 0.0 dB (minimum cut). This will disable the

EQ so that you can determine the low-frequency

resonant peak to be equalized. The factory setting

is 0.0 dB.

From the analyzer display, determine the primary

low-frequency resonant peak of the room.

Cut = 12.0 dB

Rotate the front-panel knob counterclockwise to

set Cut to maximum, 12 dB.