Art 311 User's Guide download pdf (Page 5)

CONTROLS

POWER SWITCH

The power switch applies and removes power to the Crossover. Make

sure all equipment after the 311 is either off or the outputs are turned

all the way down before turning on or off the 311.

LOW OUTPUT LEVEL CONTROL

Each channel of the 311 has a Low Output Level control. These

controls are used to trim the output levels to the Low Output jacks on

the rear of the unit.

They cover the range of –30dB to +10dB of output gain trim, as

indicated on the front panel. In most cases you would set them to 0dB,

for flattest response from the Crossover. You can use these controls to

compensate for amplifier gain variations or efficiency of your speakers.

LOW CUT FILTER SWITCH

The Low Cut switch activates a 30Hz high pass filter. There is one for

each of the Low Outputs and 1 for the Subwoofer Output. This filter is

a 2-pole Butterworth design (12dB/octave). Its response reduces

spurious subsonic frequencies, which tightens up the low end and

helps to protect your amplifiers and speakers.

CROSSOVER FREQUENCY CONTROL

Each channel of the 311 has a crossover Frequency control to set

the crossover point for the high and low frequencies. All frequencies

below the set frequency will be sent to the Low output and all

frequencies above the set frequency will be sent to the High output.

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Art 311 User's Guide Page 5