Ashly Graphic Equalizer II 4.24G Quick start guide

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

Ashly Audio Inc., 847 Holt Road, Webster, NY 14580-9103, Toll Free [phone], Telephone [phone], FAX [phone]
Internet: http://www.ashly.com, email: [email protected]
Ashly manufactures a complete and comprehensive line of Graphic and Parametric Equalizers,
Electronic Crossovers, Power Amplifiers, Compressor-Limiters, Mixers, and
Amplifier Input Options. Please call, write or visit our web site for information on any of these Ashly Products.
Applications:
PA Systems - FOH & Monitors, Concerts, Outdoor Festivals, Churches, Sports Stadiums, Auditoriums, Studios, Dance/Night Clubs,
Lecture Halls
Rear Panel 4.24G
General Specifications 4.24G
INPUT
Type:
Impedance:
Max. Level:
OUTPUT
Type:
Impedance:
Max. Level:
Frequency Response:
THD (20Hz-20kHz):
Dynamic Range:
Output Noise:
FILTERS
Type:
Number:
Filter Spacing:
Range:
Q:
Power Requirements:
Shipping Weight:
Dimensions:
I/O Connectors:
Environmental
Active Balanced
18 K ohms
+20dBu
Pseudo-Balanced
200 ohms
+20dBu
±.25dB 20Hz-20kHz
<.01% @ 1KHz, +20dBu
>110dB (20Hz-20KHz) unweighted
<-90dBu unweighted
Constant Q, Reciprocating
4 X 28
1/3 Octave
±15dB, 0.5dB Increments
Fixed, 3.2
90-125VAC, 50-60Hz, 30W
180-250VAC 50-60Hz, 30W
14 lbs
19"L x 3.5"H x 8"D
XLR, 1/4"
40-120 deg. F Noncondensing
COMPRESSOR/LIMITER
Threshold:
Ratio:
Attack:
Release:
HPF
Range:
LPF
Range:
DELAY
Maximum Delay:
Increment:
PROCESSOR
Input A to D
Output D to A
Processor
Sample Rate
Propagation Delay
-20dBu to +20 dBu
1dB increments
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)
0.5ms to 50ms per dB
(.5, 1, 2, 5, 10, 20, 50ms)
10ms to 1 sec per dB
(10, 20, 50, 100, 200, 500ms, 1 Sec)
24dB/Octave
20Hz to 10.6Khz
24dB/Octave
33Hz to 20.1KHz
1.364 seconds
20us
24 Bit
24 Bit
24 Bit, 56 Bit Accumulator
48KHz
1.46ms
Notes: 0 dBu = .775 V RMS
Rear Panel 4.24RD
General Specifications: 4.24RD
Shipping Weight: 5 lbs., Dimensions: 16.9L x 1.65H x 5.36D, I/O Connectors: XLR, Power: Phantom
Misc: Protea System Software for PC control of the Protea 4.24G may be downloaded free from our website. Use it to control the 4.24C, 4.24D, 4.24G, 4.24GS, 4.24PS, 2.24GS and
2.24PS. Download it now to preview the capabilities of the Protea System II Digital Products. Protea System Software operates on Windows 95, 98, 2000, NT, ME and XP platforms.