P E R F O R M A N C E A C C E S S O R I E S
XC-3
Two-Way Crossover
Basic Description
The XC-3 is an active two-way crossover for use with bi-amplified loudspeakers. The unit mounts to the rear panel of a two-channel DCA or CX amplifiers to save cost and rack space. The amplifier’s DataPort provides the accessory’s operating power and receives the crossover output signals, eliminating added external wiring or power transformers.
The XC-3 features 4th-order Linkwitz-Riley filters with 24 dB/octave slopes, with the low frequencies going to channel 1 and the highs to channel 2 of the amplifier. Each channel has an all-pass filter providing delay for time alignment of low-frequency and high-frequency drivers, as well as a trim control providing 0 to 20 dB of attenuation for matching levels among the various frequency bands. To compensate for screen loss or equalize for constant-directivity horns, the highfrequency channel offers up to 10 dB of boost at 20 kHz. Frequency and delay parameters for each channel are set individually.
The XC-3 also has an elective low-frequency high-pass filter for use in combination with the LF-3 Low-frequency filter for three-way applications.
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
LF-3 Features
•For 2-channel DCA series or CX series amps
•Designed for bi-amp cinema or installed sound systems
•Adds crossover and time alignment functions without requiring additional rack space, cabling, or AC outlets
•Selectable crossover frequencies from 80 Hz to 1.5 kHz
•Defeatable high-pass filter for tri-amp applications, with selectable frequencies from 80 to 500 Hz
•Selectable low-frequency time-alignment delays from 0.3 to 1.8 milliseconds
•Mounts directly to back of amplifier; interfaces with amplifier via DataPort
•Precision components for accurate performance
•Active balanced XLR inputs
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OFF |
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1 |
Bi-amp Configuration
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Ch. 1 |
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full-range audio |
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XC-3 |
LF |
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CX or DCA amplifier |
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2-way crossover |
Ch. 2 |
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Tri-amp Configuration Using LF-3 |
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Ch. 1 |
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full-range audio |
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XC-3 |
MF |
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CX or DCA amplifier |
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2-way crossover |
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Ch. 2 |
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Ch. 1 |
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LF-3 |
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LF |
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low-frequency filter |
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Ch. 2 |
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Ch. 1 |
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XC-3 |
MF |
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CX or DCA amplifier |
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full-range audio |
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HF |
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2-way crossover |
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Ch. 2 |
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1675 MacArthur Boulevard Costa Mesa, CA 92626
Ph: 800/854-4079 or 714/957-7100 Fax: 714/754-6174 www.qscaudio.com
XC-3 Spec Sheet.11/7/00
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