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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 cen-
tered on standard ISO frequencies at intervals of 1/3 octave and covering a frequen-
cy 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 maxi-
mum of 1.364 seconds adjustable in 20us increments. A 240 X 64 fluorescent back-
lit 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.
TECHNICAL NOTES & SPECIFICATIONS
ARCHITECTS SPECIFICATIONS
Protea System II 4.24G Four Channel Digital Graphic Equalizer
24 Bit A/D - D/A Audio Resolution
24 Bit/100 MHz (x2) Digital Signal
Processing
Four 28-Band 1/3 Octave Channels of EQ
Programmable Compressor/Limiter
Programmable Delay up to 1.364 Seconds
Programmable High and Low Pass Filters
Balanced XLR and 1/4 Inputs and Outputs
Intuitive User Interface
Large, 240 X 64 Fluorescent Backlit Display
Linkable Channels
Constant Q/Reciprocal Filter Design
+/- 15dB Boost and Cut, 0.5dB increments
128 Preset Locations, 50 Scenes
RS-232 Computer Interface
Full MIDI Implementation
Input and Output Metering
Password Protection of System Operation
5-Year Worry-Free Warranty