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The SF-3 subwoofer filter allows the addition of subwoofers to an existing full-range system, offering adjustable low-pass filtering and high-pass subsonic filtering with optional B6 boost and mono-summing.
The unit mounts to the rear panel of a two-channel DCA, CX, or ISA amplifier to save cost and rack spack. The amplifier’s DataPort provides the accessory's operating power and receives the output signals, eliminating added external wiring or power transformers.
For subwoofer material derived from full-range audio, a 4th-order Linkwitz-Riley low-pass filter lets you set the upper range of the subwoofer band to 80, 150, or 250 Hz. The subsonic filter offers a range of roll-off frequencies from 20 to 50 Hz to protect subwoofers from over-excursion, with optional equalization to extend the response of B6 speaker enclosures. A trim control provides 0 to 20 dB of attenuation for matching levels among the various frequency bands. Filter frequencies are programmable via provided SIP resistor networks.
| Specifications | 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: 0–70o C Input type, each channel: Electronically balanced differential Input impedance: 22.6 k‰balanced; 11.3 kΩunbalanced CONTROLS Subsonic filter frequency: Selectable using SIP resistor networks: 20,25,30,35,40 & 50 Hz Subsonic fitler Q : 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: Selectable using SIP resistor networks: 80,150 & 250 Hz Gain adjustment: Trim potentiometer 0–20 dB attenuation CONNECTORS Input: Two female 3-pin XLR Output to amplifier: Male HD-15 connector to amplifier DataPort Accessory’s operating power: Male HD-15 connector to amplifier DataPort Input stage type: 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: 4th-order Linkwitz-Riley alignment; -6 dB at crossover frequency Low-pass roll-off slope: 24 dB/octave rolloff |
|---|---|
| SKU | SF-3 |
| Condition | New |
| Manufacturer | QSC |
