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Section Eleven: GRAPHI-Q Engineering Specifications
DIGITAL PROCESSING
24 bit A/D and D/A
32-bit DSP
GRAPHIC EQUALIZER
31 digital filters on 1/3-octave ISO center frequencies, width adjust-
able¨ from 0.5 to 1.0 octave in .01 octave increments; ±12 or 6 dB
boost and cut
±6 or 12 dB boost and cut range
Independent display and control of A & B channels
FBX/PARAMETRIC FILTERS
Twelve independent digital filters per channel, controlled automati-
cally or parametrically from 20 Hz to 20 KHz, each switchable (GRQ
Remote) between FBX fixed filters, FBX dynamic filters, and para-
metric filters¹
Filter depth: user-controllable in 1 dB steps from +12 dB to -84 dB
(parametric mode); 3 dB steps from 0 dB to -80 dB (FBX mode), max.
FBX depth adjustable from -6 to -80 dB
Filter width: user-controllable from 9.99 to .01 octave (parametric),
1.0 to .01 octave (FBX*)
Low Cut Filter, user-controllable between 20 Hz and 1 KHz; 12 dB/
octave roll-off
High Cut Filter, user-controllable between 3 KHz and 20 KHz; 12dB/
octave roll-off
Resolution: 1 Hz from 20 Hz to 20 KHz, FBX & parametric mode
Time required to find and eliminate feedback: typically 0.3 seconds
@ 1 KHz
Total number of combined filters active per channel: user-select-
able, 0-12; plus low and high cut filters
DIGITAL COMPRESSOR/LIMITER
Threshold: +32 dBV to -30 dBV peak in 0.5 dB steps
Ratio: 1:1 through infinity
Knee: variable soft/hard¨
Attack: 1 to 99 msec in 1 msec steps¹
Release: .05 to 5 sec in .05 sec steps¹
Peak limit threshold: +32 dBV to -30 dBV peak in 0.5 dB steps¹
DIGITAL DELAY
1.38 to 999.96 msec in 20 µsec steps
Programmable in milliseconds, feet or meters
PASSWORD CONFIGURATION
4 levels¹
CONTROLS
GRQ-3102, 3101: Front panel, GRQ Remote (RS 232), Remote
switching
GRQ-3102S, 3101S: GRQ Remote (RS 232), Remote switching
SAVE & RECALL CONFIGURATIONS¹
68 user defined
1 factory default
1 most recent configuration (power down save)
1 front panel
INPUT/OUTPUT**
Input impedance: Balanced > 10K Ohms, PIN 2 high
Output impedance: Balanced 50 Ohms nominal, PIN 2 high
Input/Output maximum signal levels: Ba29 dBV peak
Maximum output load: 600 Ohms balanced
Bypass: true power-off bypass
I/O connectors: XLR-3, 1/4" TRS
GRQ-3102 and 3102S: Dual channel, one input, one output per
channel
GRQ-3101, and 3101S: Single channel, one input, two outputs.
Functions on each output selectable via GRQ-Remote
PERFORMANCE²
Frequency response: 20 Hz to 20 KHz, ±0.3 dB dB @ +22 dBV
THD: <0.01% at 1.0 KHz at +22 dBV with 30KHz bandwidth
SNR***: >105 dB (with ClipGuard
TM
)
Dynamic Range: >110 dB (with ClipGuard
TM
)
Headroom: +22 dB @ 4 dBV nominal input (balanced)
UPGRADES
Operating system firmware stored in FLASH RAM. All future
upgrades for firmware and software downloadable from Sabine
website using GRQ Remote.
POWER
50/60 Hz available in 100 V, 120 V, 230 V; 20 W
DIMENSIONS
2-U rack mount 19 x 3.5 x 9 in. (48.3 x 9 x 22.9 cm); 9 lb. (3.9 Kg)
1-U rack mount 19 x 1.75 x 9.5 in. (48.3 x 4.5 x 22.9 cm); 8 lb. (3.6
Kg)
* Below approximately 200 Hz the feedback filters become slightly
wider to increase the feedback and rumble capture speed at these
low frequencies.
** Inputs may be balanced or unbalanced. For maximum output
capabilities, outputs must be balanced (XLR or TRS). If either side
of an output is grounded, the peak and output dynamic range will
be reduced by 6 dB.
*** Signal-to-noise ratio is the ratio of the maximum undistorted
signal by specification (26 dBV RMS sinewave) to the noise floor
¹ Available using GRQ Remote Software only
2
Tests performed using an Audio Precision System One model
322 or equal
All GRAPHI-Qs conform to all Year 2000 (Y2K) standards.
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.)
Section Eleven: Engineering Specs
