QSC Audio Inc. 1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174 • www.qscaudio.com
SF-3 SPECIFICATIONS
GENERAL INFORMATION
Subsonic filter frequency
Subsonic fitler Q
Output to amplifier
Accessory’s operating power
GENERAL AUDIO
Input stage type
Male HD-15 connector to amplifier DataPort
Male HD-15 connector to amplifier DataPort
Electronically balanced differential; both inputs summed
Output stage type Balanced
Dynamic range 118 dB nominal
Total harmonic distortion Less than 0.1%
Signal to noise ratio Min. 103 dB
Subsonic filter type 2nd-order, 12 dB/octave
Low-pass filter type
Low-pass roll-off slope
4th-order Linkwitz-Riley alignment; -6 dB at crossover frequency
24 dB/octave rolloff
SF
-3
Supply Voltage (no load)
+15 volts provided by amplifier, -15 volts provided by internal charge-pump converter.
Supply Current Requirements
Less than 50 mA
Operating Temperature
0–70
o
C
Input type, each channel
Electronically balanced differential
Input impedance
22.6 k‰balanced; 11.3 kΩ unbalanced
CONTROLS (each channel)
Selectable using SIP resistor networks: 20, 25, 30, 35, 40 & 50 Hz
Selectable using DIP switch: 0.707 (Butterworkth) or 2 (6 dB peak)
Low-pass filter
Bypass or engage using DIP switch
Low-pass filter frequency
Gain adjustment
Selectable using SIP resistor networks: 80, 150 & 250 Hz
Trim potentiometer 0–20 dB attenuation
CONNECTORS
Input
Two female 3-pin XLR
