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SETUP: MODE SWITCHES: CLIP LIMITER AND LOW FREQUENCY FILTERS
Frequency Response Curves
Filter off
Filter ON, 33 Hz.
Filter ON, 70 Hz.
Low Frequency Filtering Tips:
The OFF position should be used only for subwoofer systems with rated frequency response below 33 Hz. or if low frequency
filtering is provided by other devices.
Know the specification of the speaker cabinet you are driving. Match the low frequency roll off setting to the specified low
frequency capability of the speaker cabinet. Do not drive the speaker with frequencies below its rating.
Unless you have low frequency filtering before the amplifier, use the low frequency filter to protect your loudspeakers from
cone over-excursion caused by frequencies below the speaker’s limits.
The 33 Hz. rolloff is a good “all purpose” setting. Turn the filter on by setting the appropriate DIP switch to ON position and
select 33 Hz. using its 33/70 Hz. DIP switch. This setting is a good starting point for most large, full-range cabinets.
The 70 Hz. rolloff is a good setting to use with smaller, compact speaker cabinets having limited bass capability. Turn the
filter ON and select the 70 Hz. setting when using smaller cabinets.
The frequency selection ( 33 or 70 Hertz) has no effect unless the filter is set to the ON position.