QSC SRA 3622 Bedienungsanleitung PDF herunterladen (Seite 19)

SETUP- Low Frequency Filter

Channel 1’s low frequency filter is operated by

switches 2 and 3. Channel 2’s filter is operated

by switches 8 and 9.

FILTER ON: To turn the filter on, slide the switch to the right (Sw.2: Ch.1, Sw.9: Ch.2).

FILTER OFF: To turn the filter off, slide the appropriate switch to the left.

20 HERTZ: To set the filter for a 20 Hz. rolloff, slide the switch to the right (Sw.3: Ch.1, Sw.8: Ch.2).

50 HERTZ: To set the filter for a 50 Hz. rolloff, slide the appropriate switch to the left.

Unless you already have filtering in the signal path

preceding the amplifier, use the low frequency filter to

protect your speakers from cone overexcursion caused

by frequencies below the speaker’s limits. The speaker’s

documentation will specify the low frequency limit.

Generally, match the frequency selection to your

speaker’s low frequency capability. This improves

speaker performance by limiting subaudio cone move-

ment, making more power available for the speaker’s

rated frequency range.

Each channel has its own low frequency filter. Channel

1’s low frequency filter is operated by switches 2 and 3.

Channel 2’s filter is operated by switches 8 and 9.

Low Frequency Filters

NOTE! The filter on/off switch must be set to the “on” position for the frequency

selection to be active. If the on/off switch is set to the “off” position, no filtering will

take place regardless of the frequency selection.

SRA Series amplifier low

frequency response curves.

Output (dB)

Frequency (Hertz)

Filter= Off

Filter= 20 Hz.

Filter= 50 Hz.

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QSC SRA 3622 Bedienungsanleitung Seite 19