Mordaunt-Short 500 Series THX owner manual Volume, Notch Filter, Power, Auto/On, fig. fig

MS502 INTEGRATED SUBWOOFER AMPLIFIER

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.

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