Ashly PROTEA SYSTEM II 4.24C Quick start guide

Protea System II 4.24C
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 para-
metric 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 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
Technical Notes & Specifications
Protea System II 4.24C Digital Crossover/System Processor
Architects Speci cations

Ashly Audio Inc., 847 Holt Road, Webster, NY 14580-9103, Toll Free [phone], Telephone [phone], FAX [phone]
Internet: http://www.ashly.com, email: [e-mail]
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.
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:
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, 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
Rear Panel Protea System II 4.24C
Applications:
Distributed Sound, Sound Masking, Multi-Room Installations for Lobby or Under Balcony Speaker Management, FOH Speaker
Management, Delay Towers and Side Fills, Monitor Systems (wedge and in-ear) Tuning and Protection
Misc:
Protea System Software for PC control of the Protea 4.24C 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, XP and NT platforms.