User guide
www.jbl.com
Subwoofer
1. Select Sub (for subwoofer).
2. The MS-8 will then display None, 1, 2. Use the remote’s Up and Down navigation buttons
to highlight one of these options, and press the Select button to select it. Your audio
system’s subwoofer conguration determines which option you should select.
For example, if you have one subwoofer being powered by one amplier channel (either an
outboard amplier or an MS-8 amplier channel), select 1. If you have two subwoofers, each
powered by its own amplier channel, connected to separate MS-8 outputs, select 2. If you
have two subwoofers, each powered by its own amplier, but those amplier channels are
connected to a single MS-8 output, select 1.
3. If you’ve chosen None, skip to , on page 28.
4. If you’ve chosen 1 or 2, the display will then read Subsonic Filter. This screen enables you
to choose the subsonic (that is, infrasonic) high-pass lter for the system’s subwoofer(s).
Use the remote’s Left and Right navigation buttons to display a frequency between 20Hz
and 50Hz, and press the Select button to select it. If you’re not sure which frequency to
choose, we recommend using 20Hz.
5. The MS-8 will then display Subsonic Slope. This screen enables you to determine the
subsonic lter’s attenuation rate. Use the Up and Down navigation buttons to highlight an
attenuation rate, and press the Select button to select it. If you’re not sure which rate to
choose, we recommend using 12dB/octave.
6. The MS-8 will then display Sub/Front Xover. This screen enables you to determine the
crossover frequency between the subwoofer and the front left and right speakers. You
should determine this frequency by the amount of bass your left/right speakers can safely
produce, considering the amount of power that will be applied to them. Use the Left and
Right navigation buttons to display a frequency between 50Hz and 200Hz, and press the
Select button to select it. If you’re not sure which frequency to choose, we recommend
using 80Hz.
7. The MS-8 will then display Sub/Front Slope. This screen enables you to choose the rate
of attenuation between the subwoofer and the front speakers. The speakers’ performance
characteristics should determine your selection. Use the Up and Down navigation buttons
to highlight an attenuation rate, and press the Select button to select it. If you’re not sure
which rate to choose, we recommend using 24dB/octave.
If you make a mistake
If you make a mistake and need to reenter Output Setup information, you must abort
the Xover Setup process and start it again. To abort the process:
1. Hold the remote’s Back/Menu button until the Main Menu screen appears.
2. Select Calibration/Setup; then select Input/Output Setup.
3. When the Warning Message screen appears, select Continue.
4. When the Input Setup screen appears, select Skip Input Setup.
5. The MS-8 will display the Xover Setup, Sub screen. Continue below.
CALIBRATION/SETUP
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