Installation manual

Page 24
Setup 2 - Speaker Level
The Cinema Rhapsody Mach 4’s makes it easy to balance the
speaker channels for the optimum home theater experience. Prior
to entering this step, you should already have completed the posi-
tioning of your speakers and programmed their size into the Cinema
Rhapsody Mach 4.
While delay settings (discussed in the next section) make certain that
the sound from each speaker arrives to the primary listening position
at the precise moment in time, Speaker Level adjustment makes
certain that the balance of volume between speakers is accurate. A
speaker further away from the listening position might not sound as
loud as one that is closer so you will need to adjust that speakers
level a little higher than the closer speaker. Alternately, one type of
speaker (a front channel speaker) may have different characteristics
from a rear channel speaker.
To do this properly, you will need to use an SPL Meter (Sound
Pressure Level). There are several on the market including models
that feature an analog meter (sweeping needle) while other units
feature a digital numeric readout. For Speaker Level setup, the
SPL meter with an analog sweeping needle will work best.
To setup the meter, make certain that you have good batteries and
set the meters two switches to “C Weighted” and “Slow”. Set the
Range to 80 dB (Decibels) which covers the level range from 70
dB to 86 dB as the range point for setting up a home theater is 75
dB. Position the SPL meter at the primary seating area and aim its
microphone toward the rst speaker (typically Front Left).
The Cinema Rhapsody Mach 4 features an internal Pink Noise gen-
erator which is used to determine the signal level to each speaker.
Please note that pink noise is a static type sound that will not harm
your speakers and is used strictly for calibration.