TECHNICAL NOTES & SPECIFICATIONS
ARCHITECTS SPECIFICATIONS
Protea System II 2.24PS Two Channel Digital Parametric Equalizer Slave
24 Bit A/D - D/A Audio Resolution
24 Bit/100MHz (x2) Digital Signal Processing
Two 12-Band Channels of Parametric EQ
Programmable Compressor/Limiter
Programmable Delay up to 1.364 Seconds
Programmable High and Low Pass Filters
Programmable High and Low Shelf Filters
Control From PC or MIDI
Contact Closure for External Recall of 6 Scenes
Balanced XLR and 1/4 Inputs and Outputs
Linkable Channels
+10/- 20dB Boost and Cut, 0.5dB increments
128 Preset Locations, 50 Scenes
RS-232 Computer Interface
Full MIDI Implementation
5-Year Worry-Free Warranty
Protea System II 2.24PS
The programmable parametric equalizer shall consist of two inde-
pendent channels of 24 bit digital parametric equalization. Each
channel shall consist of 12 bands with an adjustable Q ranging
from 1/25th to 3.3 octaves. Frequency adjustment shall be twen-
ty-four step/octave from 20Hz to 20KHz. The range of equaliza-
tion per band shall be +10/-20dB 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 to 20kHz. Dynamic Range shall
be greater than 110dB (20Hz-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. Each channel
shall have a programmable high shelf filter adjustable from
1.6KHz to 20KHz and a low shelf filter adjustable from 20Hz to
240Hz. Level adjustment of the High and Low Shelf shall be in
0.5dB increments with a range of +/-15dB and shall have a selec-
table slope of 6 or 12dB. 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 compres-
sor/limiter with adjustable threshold, ratio, attack and release
controls, and a time delay capable of a maximum of 1.364 sec-
onds adjustable in 20us increments. LED indicators shall show
signal present, clip and MIDI channel number. Channel gain
shall be adjustable over a range of +6dB to - infinity in 0.5db
increments. Control of the unit shall be via the RS-232 serial
port using Ashly Protea System Software, or via MIDI. External
recall of up to six scenes via contact closure shall be accessable
through a db9 connector. The equalizer shall weigh 13 lbs. net
and mount in a standard 19 rack using 1 space (1.75 high). The
power requirement shall be 90-125VAC (180-250VAC, switch-
able), 50-60Hz, 20W. The unit shall be the Ashly Audio Protea
System II 2.24PS.