QSC Audio manual Basic Description, Compatible amplifier models, SF-3 Features

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P E R F O R M A N C E A C C E S S O R I E S

SF-3

Subwoofer Filter

Basic Description

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 or CX amplifiers 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 sub- woofer 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 fre- quencies are programmable via provided SIP resistor networks.

Compatible amplifier models

DCA 1222, DCA 1622, DCA 2422, DCA 3022, and DCA 3422

CX 302, CX 502, CX 702, CX 902, CX 1102, CX 302V, CX 602V, and CX 1202V

SF-3 Features

For 2-channel DCA series or CX series amps

Designed for professional cinema applications or installed sound systems

Mounts directly to back of amplifier; interfaces with amplifier via DataPort

Adds low-pass and subsonic filtering functions without requiring additional rack space, cabling, or AC outlets

Precision components for accurate performance

Active balanced XLR inputs

Selectable subsonic frequencies from 20 Hz to 50 Hz

Defeatable 24 dB/octave low-pass filter for deriving subwoofer program from mono or stereo full-range audio

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Ch. 1

Cinema processor

 

SF-3

 

DCA amplifier

 

 

or full-range audio

 

 

subwoofer output

 

 

 

 

subwoofer filter

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1675 MacArthur Boulevard Costa Mesa, CA 92626

Ph: 800/854-4079 or 714/957-7100

Fax: 714/754-6174www.qscaudio.com

SF-3 Spec Sheet.11/7/00

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Contents Basic Description SF-3 FeaturesCompatible amplifier models General Information ConnectorsGeneral Audio

SF-3 specifications

QSC Audio SF-3 is a premium loudspeaker designed to deliver superior sound performance in a variety of professional audio settings. Renowned for its versatility, the SF-3 is ideal for applications such as live sound, installations, and events where audio clarity and reliability are paramount.

One of the standout features of the SF-3 is its built-in advanced DSP technology. Digital Signal Processing allows for real-time audio adjustments, ensuring optimal performance regardless of the environment. The DSP provides precise control over EQ, crossover settings, and limiting, allowing users to tailor the sound to their specific needs. This technology plays a crucial role in maximizing the loudspeaker's efficiency and extension across frequencies.

The SF-3 utilizes a robust, high-performance transducer system. With a 10-inch low-frequency driver complemented by a 1.4-inch titanium diaphragm compression driver, the loudspeaker offers a remarkable frequency response. This configuration ensures powerful bass performance combined with smooth high-frequency reproduction, resulting in a balanced overall sound signature. The speaker's ability to produce high SPL (Sound Pressure Levels) makes it suitable for large venues or outdoor events where volume and clarity must be maintained.

Durability and build quality are also significant characteristics of the SF-3. The enclosure is constructed from high-quality materials designed to withstand the rigors of touring and frequent transport. The cabinet's design not only enhances its aesthetic appeal but also contributes to its acoustic performance by minimizing cabinet resonance.

In terms of connectivity, the QSC SF-3 features a range of input options, including XLR/TRS combo jacks, making it compatible with various audio sources. This flexibility enables seamless integration with different sound systems while maintaining signal integrity. Additionally, the loudspeaker can be mounted in various configurations and has rigging options to accommodate multiple deployment scenarios.

Overall, the QSC Audio SF-3 loudspeaker stands out as a compelling choice for audio professionals seeking a combination of power, clarity, and versatility. Its sophisticated DSP capabilities, robust transducer system, and durable design make it an excellent option for any setting that requires exceptional audio performance, whether in live music venues, corporate events, or permanent installations. With the SF-3, QSC continues to uphold its reputation for excellence in audio technology, catering to the needs of sound engineers and artists alike.