SABINE GRAPHI-Q2 Specifications download pdf (Page 54)

B2-GRQ-2-OpGuide-v1-060519.pmd

Section Eleven: Graphi-Q2 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 auto-

matically or parametrically from 20 Hz to 20 KHz, each switchable

(GRQ2 Remote) between FBX fixed filters, FBX dynamic filters, and

parametric 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; 12

dB/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

CROSSOVER

1x2; available in all Graphi-Q2 units

Bessel, Butterworth, Linkwitz-Reily filters

Slopes: 12, 24, 36, and 48 dB/octave

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

GRQ3122, GRQ3121: Front panel, GRQ Remote (RS-232), Re-

mote switching

GRQ3122-S, GRQ3121-S: GRQ Remote (RS-232), Remote switch-

ing

SAVE & RECALL CONFIGURATIONS¹

20 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: Balanced +18 dBV peak

Maximum output load: 600 Ohms balanced

Bypass: true power-off bypass

I/O connectors: XLR-3, 1/4" TRS

GRQ3122 and GRQ3122-S: Dual channel, one input, one output

per channel

GRQ3121, and GRQ3121-S: Single channel, one input, two

outputs. Functions on each output selectable via GRQ2 Remote

PERFORMANCE²

Frequency response: 20 Hz to 20 KHz, ±0.2 dB @ +18 dBV

THD: <0.01% at 1.0 KHz at +18 dBV with 30KHz bandwidth

SNR***: >105 dB

Dynamic Range: >110 dB

Headroom: +14 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 the Sabine Upgrade Wizard (see Section 8.10).

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)

OPERATING TEMPERATURE

Safe Operating Temperature: 0 - 50 degrees centigrade ambient

temperature (32-129F)

* 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.

Tests performed using an Audio Precision System One model

322 or equal.

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

SECTION ELEVEN: ENGINEERING SPECS

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SABINE GRAPHI-Q2 Specifications Page 54

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