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manual abstract
Each output channel shall include: a routing stage allowing the user to assign the output to any or a combination of input(s); a high pass/ low pass crossover filter stage with selectable slopes of 12, 18, 24 and 48dB per octave using Linkwitz-Riley, Bessel or Butterworth filter configurations; four filter stages configurable to be a parametric filter with a frequency range of 19.7Hz to 21.9KHz, 1/24th octave step and a +15dB boost, -40dB cut, or a 6 or 12dB/octave high or low shelf filter; a delay stage with a maximum delay of 21.33ms; a gain stage capable of +12dB boost and -40dB cut and the abil- ity to invert the phase; a full function compressor/limiter with a threshold range of -20dBu to +20dBu. Each input and output shall have individual mute capability. The programmable digi- tal crossover shall have a maximum in/out level of +20dBu. Frequency response shall be ±.25dB 20Hz to 20kHz. Dynamic Range shall be greater than 110dB (20-20KHz, unweighted) and SMPTE intermodulation distortion or THD shall be less than 0.01% at 1KHz, +20dBu. Input impedance shall be 18K ohms active balanced. Output impedance shall be acive balanced, 100 ohms. Inputs and outputs shall be balanced type on XLR con- nectors. A 2 X 20 backlit LCD display will show all parameter, function and utility information. LED indicators shall show signal level, clip, limit threshold and mute conditions. Full program- ming and control of the unit shall be from the front panel or via the front panel accessable RS-232 serial port using Ashly Protea System Software, or via MIDI. There shall be 30 factory presets that may be overwritten by the user and stored. There shall also be a four level security lockout feature. The programmable digital crossover shall weigh 10 lbs net and mount in a standard 19” rack using 1 space (1.75” high). The power requirement shall be 80-260VAC, 50-60Hz, 30W. The unit shall be an Ashly Audio Protea System II 4.24C Digital Crossover/System Processor. Features: • One Rack Space• Four Inputs - Eight Outputs• Outputs Assignable to Any Input• Crossover, EQ, Delay and Limiter Functions• Linkwitz-Riley, Bessel and Butterworth Filters• 12, 18, 24 and 48dB/Octave Slopes• Parametric EQ: Full Bandwidth, 1/64th to 4 Octave Range• Input and Output Delay• Limiter on Each Output• Intuitive User Interface• Programmable by Front Panel, PC or MIDI• Individual Input and Output Metering• Balanced Inputs and Outputs• XLR Audio Connections• Password Protected System Security• Five Year Warranty General Specifications Protea System II 4.24C INPUT: Active Balanced, 18 Kohms MAX. INPUT LEVEL: +20 dBu OUTPUT: Active Balanced, 100 ohms MAX. OUTPUT LEVEL: +20 dBu FREQUENCY RESPONSE: 20 Hz-20KHz, ±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: 6 per Input, 4 per Output Selectable As: PARAMETRIC BANDWIDTH: 1/64th Octave to 4 Octave RANGE: +15/-30dB, 0.1 dB increments 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, 0.1dB increments CROSSOVER FILTERS: HIGH PASS FILTER TYPE: Linkwitz-Riley, Bessel, Butterworth SLOPE: 12, 18, 24 and 48dB/Octave FREQUENCY RANGE: Off to 21.983.3KHz, 1/24 Octave LOW PASS FILTER TYPE: Linkwitz-Riley, Bessel, Butterworth SLOPE: 12, 18, 24 and 48dB/Octave FREQUENCY RANGE: Off to 21.983.3KHz, 245 step increments DELAY: INPUT MAXIMUM DELAY: 682.5ms OUTPUT MAXIMUM DELAY: 21.33ms INCREMENT: 20.s 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, 1.0dB 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 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: SIGNAL AND CLIP LEDs: Inputs: -20/Mute, -10, 0, +10, Clip (dBU or VU) Outputs: -20/Mute, -10, 0, Limit, Threshold, Clip (dBu or VU) RS232 CABLE DISTANCE: 1300ft (Max) MIDI CABLE DISTANCE: 500ft (Max) POWER REQUIREMENTS: 80 -260VAC, 30W max 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 Notes: 0dBu = 0.775V RMS INPUT: Active Balanced, 18 Kohms MAX. INPUT LEVEL: +20 dBu OUTPUT: Active Balanced, 100 ohms MAX. OUTPUT LEVEL: +20 dBu FREQUENCY RESPONSE: 20 Hz-20KHz, ±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: 6 per Input, 4 per Output Selectable As: PARAMETRIC BANDWIDTH: 1/64th Octave to 4 Octave RANGE: +15/-30dB, 0.1 dB increments RESOLUTION: 1/24th Octave HIGH-SHELF SLOPE: Sele...