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Protea System II

4.24C Digital Crossover/System Processor 

 
     
 
 
Four Inputs and Eight Outputs coupled with a user interface so easy you won't even need the manual to set up your system, the Protea System II 4.24C Digital Crossover/System Processor has all the audio processing tools needed for precise crossover and sound control. Each input allows you to control gain, delay and four parametric, low or high shelf filters. In addition to setting  crossover frequencies, each output may be assigned to any one or a combination of inputs, allows you to program three parametric, low or high shelf filters, delay for time delay adjustments, output gain, reverse polarity and a compressor/limiter for speaker protection. All this in a one rack space with XLR input and output connections. You may also program and control the 4.24C with Ashly's Protea System Software (WindowsTM 95, 98, 2000 and NT platforms), MIDI or SIA-Smaart software. In all, the Protea 4.24C is a powerful tool for use in fixed installation and live sound applications.
 
[click here to view the Protea System Software control configuration screen or here to download the beta software]
 

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bulletOne Rack Space
bulletFour Inputs - Eight Outputs
bulletOutputs Assignable to Any Input
bulletCrossover, EQ, Delay and Limiter Functions
bulletLinkwitz-Riley, Bessel and Butterworth Filters
bullet12, 18 and 24dB/Octave Slopes
bulletParametric EQ: Full Bandwidth, 1/64th to 4 Octave Range
bulletInput and Output Delay
bulletLimiter on Each Output
bulletIntuitive User Interface
bulletProgrammable by Front Panel, PC or MIDI
bulletIndividual Input and Output Metering
bulletBalanced Inputs and Outputs
bulletXLR Audio Connections
bulletTwo Levels of Security
bulletFive Year Warranty

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Protea System II 4.24C SPECIFICATIONS:
INPUT: Active Balanced, 18 kohms
MAX. INPUT LEVEL: +20 dBu
OUTPUT: Active Balanced, 100 ohms
MAX. OUTPUT LEVEL: +20 dBu
FREQUENCY RESPONSE: 20 Hz-20 kHz, ▒0.25 dB
THD: <0.01% @1 kHz, +20 dBu
DYNAMIC RANGE: >110 dB (20 Hz-20 kHz) unweighted
OUTPUT NOISE: <-90 dBu unweighted
 
EQ FILTERS:
NUMBER: 4 per Input, 3 per Output
Selectable As:
PARAMETRIC
BANDWIDTH: 1/64th Octave to 4 Octave
RANGE: +15/-30dB, 0.1 dB increments
FREQUENCY RESOLUTION: 1/24th Octave
HIGH-SHELF
SLOPE: Selectable 6 or 12dB/Octave (1 High Shelf, 2 High Shelf)
FREQUENCY RANGE: 19.7Hz to 2KHz
RANGE: +/-15dB, 0.1dB increments
LOW-SHELF
SLOPE: Selectable 6 or 12dB/Octave (1 Low Shelf, 2 Low Shelf)
FREQUENCY RANGE: 3.1886KHz to 20.1587KHz
RANGE: +/-15 dB, 0.1 dB increments

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CROSSOVER FILTERS:
HIGH PASS FILTER
TYPE: Linkwitz-Riley, Bessel, Butterworth
SLOPE: 12, 18 and 24dB/Octave
FREQUENCY RANGE: Off to 21.983.3KHz, 245 step increments
LOW PASS FILTER
TYPE: Linkwitz-Riley, Bessel, Butterworth
SLOPE: 12, 18 and 24dB/Octave
FREQUENCY RANGE: Off to 21.983.3KHz, 245 step increments
 

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DELAY:
INPUT MAXIMUM DELAY: 682.5ms
OUTPUT MAXIMUM DELAY: 21.33ms
INCREMENT: 20Ás
 
INPUT and OUTPUT GAIN:
RANGE: +12/-40dB, 0.1dB increments
 
POLARITY
0 or 180 degrees (selectable in the Output Gain Stage)
 
COMPRESSOR/LIMITER:
THRESHOLD: -20dBu to +20 dBu, 1dB increments
RATIO: 1.2 :1 to Infinity (1.2, 1.5, 2., 3, 4, 6, 10, 20, Infinite:1)
ATTACK: 0.5 ms to 50 ms per dB
RELEASE: 10 ms to 1 sec. per dB
RANGE: 20 Hz to 10.6 kHz
 
 
PROCESSOR:
INPUT A TO D: 24 bit
OUTPUT D TO A: 24 bit
PROCESSOR: 24 bit, 56 bit accumulator
SAMPLE RATE: 48 kHz
PROPAGATION DELAY: 1.46 ms
 
 
OTHER:
POWER REQUIREMENTS: 80 - 260VAC, 30W
SHIPPING WEIGHT: 10lbs
DIMENSIONS: 19.0"L x 1.75"H x 6.0"D
I/O CONNECTORS: XLR
ENVIRONMENTAL 40-120 deg. F, noncondensing

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