Protea Digital Processors

Protea 4.24G Four Channel Graphic Equalizer/System Processor

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General Specifications Frequency Response: ±.25dB 20Hz-20kHz THD (20Hz-20kHz: <.01% @ 1KHz, +20dBu Dynamic Range: >110dB (20Hz-20KHz) unweighted Output Noise: <-90dBu unweighted FILTERS Type: Constant Q, Reciprocating Number: 4 X 28 Filter Spacing: 1/3 Octave Range: ±15dB, 0.5dB Increments Q: Fixed, 3.2 Power Requirements: 90-125VAC, 50-60Hz, 30W 180-250VAC 50-60Hz, 30W Shipping Weight: 14 lbs Dimensions: 19"L x 3.5"H x 8"D I/O Connectors: XLR, 1/4" Environmental: 40-120 deg. F Noncondensing COMPRESSOR/LIMITER Threshold: -20dBu to +20 dBu, 1dB increments Ratio: 1.2:1 to Infinity (1.2:1, 1.5:1, 2:1, 3:1, 4:1, 6:1, 10:1, 20:1, inf:1) Attack: 0.5ms to 50ms per dB (.5, 1, 2, 5, 10, 20, 50ms) Release: 10ms to 1 sec per dB (10, 20, 50, 100, 200, 500ms, 1 Sec) HPF: 24dB/Octave Range: 20Hz to 10.6Khz LPF: 24dB/Octave Range: 33Hz to 20.1KHz DELAY Maximum Delay: 1.364 seconds Increment: 20us PROCESSOR Input A to D: 24 Bit Output D to A: 24 Bit Processor: 24 Bit, 56 Bit Accumulator Sample Rate: 48KHz Propagation Delay: 1.46ms Note: Specifications are subject to change or improvement without notice.

Architect Specifications Protea System II 4.24G The programmable graphic equalizer shall consist of four independent channels of 24 bit digital graphic equalization. Each channel shall consist of 28 bands centered on standard ISO frequencies at intervals of 1/3 octave and covering a frequency range of 31Hz to 16kHz. Frequency bands shall be activated by individual up and down tactile switches. The range of equalization per band shall be ±15dB in 0.5dB increments. The equalizer shall have a gain of unity with all bands set at zero, and shall have a maximum in/out level of +20dBu. Frequency response shall be ±.25dB 20Hz to20kHz. 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 balanced. Output impedance shall be 200 ohms. Inputs and outputs shall be balanced type on XLR and 1/4" phone jacks. Individual filters shall be of a constant Q reciprocal filter design. Boost and cut characteristics shall be fully symmetrical. The equalizer shall also include on each channel a 24dB per octave high pass filter adjustable from 20Hz to 10.6KHz, a 24dB per octave low pass filter adjustable from 33Hz to 20KHz, a full function, pre/post switchable compressor/limiter with adjustable threshold, ratio, attack and release controls, and a time delay capable of a maximum of 1.364 seconds adjustable in 20us increments. A 240 X 64 fluorescent backlit LCD display will show all parameter, function and utility information. LED indicators shall show signal present and mute conditions. Channel gain shall be adjustable over a range of +6dB to - infinity in 0.5db increments. Control of the unit shall be from the front panel, via the optional 4.24RD remote control, via RS- 232 serial port using Ashly Protea System Software, or via MIDI. The equalizer shall weigh 14 lbs net and mount in a standard 19" rack using 2 spaces (3.5" high). The power requirement shall be 90-125VAC (180-250VAC, switchable), 50-60Hz, 30W. The unit shall be an Ashly Audio Protea System II 4.24G. The optional remote controller shall operate all functions of the Protea unit using push-buttons and shall be phantom powered from the Protea unit so that no batteries or AC line cords are needed while controlling the Protea unit. Connections between the controller and Protea unit shall be accomplished using standard XLR mic cables. A 240 X 64 fluorescent backlit LCD display shall show all parameter, function and utility information. LED indicators shall show channel and mute conditions. The remote controller shall have a low profile for desk-top operation. The remote controller shall be the model Protea System II 4.24RD.

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