JBL MSC1, Owner'S Manual, Page: 25 / 36

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Section 8: Reference
In addition to allowing connection of a subwoofer, the MSC1 includes sophisticated
Bass Management Crossover with a choice of three crossover frequencies, to precisely
integrate the subwoofer into your system. When the SUB Control is Illuminated, the
SUB output is enabled and the MSC1 Bass Management Crossover is engaged. When
the control is not illuminated, the subwoofer output is muted and the Left and Right
speakers return to full-range operation. Three crossover settings are provided and can
be set using the MSC1 Control Center software: 60 Hz, 80 Hz and 120 Hz. Also, using
the software, the subwoofer level can be increased or decreased by 10 dB. Finally,
during RMC calibration, the sub is automatically balanced to the speaker system.
Equalization
Equalization can be applied to speakers connected to the Left and Right "A"
SPEAKER OUTPUTS to tailor response to preference, or acoustic conditions
in the room.
The MSC1 offers two bands of equalization (high and low frequency
shelving type), with up to 3 dB of attenuation or boost in each band. Using the
supplied MSC1 Control Center software, the corner frequency for each band is
adjustable from 34 Hz to 1.1 kHz (LF) and 2.5 kHz and 17 kHz (HF).
To turn equalization on, press the EQ button so that it is illuminated. Equalization
settings are accomplished, and presets can be created using the supplied
MSC1 Control Center software.
Delay and Level Trim
Left and Right Speakers and a subwoofer connected to the "A" SPEAKER OUTPUTS
can be level-matched and independently delayed to compensate for differences in
placement relative to the listening position. These adjustments can be made using
a computer and supplied MSC1 Control Center software.
Left and Right speaker levels can be independently attenuated up to 12 dB in .25
dB increments. The subwoofer level can be ad/- 10 dB in .25 dB increments,
allowing it to be finely balanced in the system.
Left and Right speakers and the subwoofer can also be independently delayed
which can be useful if, out of necessity, the left and right speakers differ in distance
from the listening position. The application of delay to the closer of the two speakers
will restore strongest possible stereo image by allowing sound from both speakers
to arrive at the ears at precisely the same time, regardless of physical positioning.
Delaying the subwoofer, or the Left and Right speakers relative to the subwoofer,
can enhance the low frequency performance of the system by virtually aligning
the subwoofer with the main speakers. Delay units are expressed in values of
distance, from 0 feet (0 cm) to a distance of 3.75 ft. (114 cm) in 1 inch (2.54 cm)
increments. The subwoofer can be delayed from 0 ft. (0 cm) to 3.17 ft (96.6 cm).
For example, applying a delay value of 1 ft. (30.45 cm) to a speaker will cause the
audio from that speaker to sound as if it originates 1 foot farther away relative to
the other speakers.