Mordaunt-Short 500 Series THX - Manual (Page 7)

5. Volume
This control allows you to adjust the volume of the low frequency output
of your sub woofer amplifier for best sound-balance. This adjustment is
defeated in THX mode as THX approved surround-sound processors
allow subwoofer level adjustments to be done by the processor.
6. Notch Filter
This is a single band Parametric EQ that is a powerful tool to help your
loudspeaker system sound it’s best. The low frequency response that
you hear is actually a function of the room itself. The Notch Filter can
help your MS502s adapt to the listening environment. Often, the in-room
response is dominated by a single resonant peak in the bass region. The
MS502 system can overcome this problem by tuning the in-built notch
filter to the same frequency as the problem resonance. The notch then
attenuates this frequency only and gives a more even, flatter bass re-
sponse. Two levels of cut –6dB (shallow) and –12dB (deep) are available.
See “EQ Adjustment” section for full details.
7. Power
Switches the subwoofer amplifier power on or off.
8. Auto/On
If switched to auto, the amp will remain in standby mode until a signal is
detected at the input. The unit will then automatically switch itself on. The
MS502 subwoofer will then automatically go back into standby mode if an
input signal is not present at the input for approximately 5 minutes. When
the switch is in the ‘ON’ position the unit remains permanently on as long
as the main power switch is on. The LED positioned here indicates whether
the unit is on or in standby mode (red for standby and green when on).
This LED will also light red when a fault is detected.
MS502 INTEGRATED SUBWOOFER AMPLIFIER
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fig. 7
fig. 8