General 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: 6 per Input, 4 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

CROSSOVER FILTERS:
HIGH PASS FILTER
TYPE: Linkwitz-Riley, Bessel, Butterworth
SLOPE: 12, 18, 24 and 48dB/Octave
FREQUENCY RANGE: Off to 21.9833KHz, 245 step increments
LOW PASS FILTER
TYPE: Linkwitz-Riley, Bessel, Butterworth
SLOPE: 12, 18, 24 and 48dB/Octave
FREQUENCY RANGE: Off to 21.9833KHz, 245 step increments

DELAY:
INPUT MAXIMUM DELAY: 682.5ms
OUTPUT MAXIMUM DELAY: 21.33ms
INCREMENT: 20µs

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

Architect Specifications

The programmable digital crossover shall consist of four inputs and eight outputs with the ability to assign any output to any input.

Each input channel shall include: a delay stage with a maximum delay of 682.5ms; a gain stage capable of +12dB boost and -40dB cut; six 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.

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 ability 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 digital 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 connectors. 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 programming 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.