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SABINE GRAPHI-Q2 - User Manual

SABINE GRAPHI-Q2
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B1-GRQ-2-OpGuide-v1-050125.pmd
GRQ3121 (1U, single channel, one input, two outputs)
GRQ3122 (2U, dual channel, one input & output per channel)
GRQ3121-S (1U, blank front panel slave, single channel, one input, two outputs)
GRQ3122-S (1U, blank front panel slave, dual channel, one input & output per channel)
GRQ2 Remote for Windows
TM
Software included with every unit; runs up to 8 Graphi-Q2s per COM port
(maximum of 2 COM ports)
All front panel controls are analog-style; signal path is digital
“Tweek-n-Peek” feature: Front panel adjustments of all parameters are shown in LED display screen
24-bit A/D and D/A conversion, 32-bit processing
20 to 20 KHz Frequency Response
+18 dBV Maximum Signal Input & Output
Floating Point SHARC Processor
>110 dB dynamic range
Each channel provides (now with fully independent processing on 1x2 units):
31-band graphic EQ, with ± 6 or 12 dB range (selectable)
Crossover: Bessel, Butterworth, and Linkwitz Reily filters; slopes to 48 dB/octave (Software only)
High Cut Filter (3KHz to 20KHz) and Low Cut Filter (20 Hz to 1KHz)
FBX Feedback Exterminator: up to 12 Filters, with Setup Mode (Auto Setup Mode via remote control)
Parametric Filters: up to 12 filters, numeric or graphic control (Software only)
Compressor/Limiter, with controls for ratio, threshold, and gain (attack, release, and knee adjustable
with remote)
Digital Delay, with up to 1 second delay, adjustable in 20 microsecond increments
Bypass: dedicated switches for FBX, EQ, and Delay with built in LED indicators
LED Segmented Indicators: FBX Filters, Level, Gain Reduction
LED Point Indicators: FBX Setup, Remote, EQ Range
LED Character Display: Delay setting, EQ fader boost/cut, High Cut Filter setting Low Cut Filter setting,
Compressor Ratio, Threshold, Gain, and Staus Messages.
Back Panel:
XLR & 1/4" TRS inputs & outputs
RS-232 Serial input & output (additional serial input on the slave front panels)
Remote switching (8-position contact closure switch; allows switch selection of all 20 stored Graphi-
Q2 presets)
Graphi-Q2 Remote Software Features:
All front panel controls, plus more, including:
FBX filter depth & width adjustments; switchable to parametric filters (depth, width & frequency
adjustments)
Graphic EQ filter width adjustments
Password protection
View & edit frequency response curves
20 user-defined stored presets
Control and link up to 8 Graphi-Q2s (16 channels of audio) per COM port (1 or 2 ports can be used)
Future-proof FREE Flash RAM upgrade capability: upgrade your firmware and software from the Sabine
website (www.Sabine.com)!
Summary of Features
S
UMMARY OF FEATURES
Operating Guide Version 1: for Sabine Graphi-Q2s with:
GRQ2 Firmware Version 2.20
GRQ2 Remote Software Version 5.0

Table of Contents

Questions and Answers

  • S
    Steven McculloughAug 20, 2025
    What to do if feedback is not being removed by SABINE GRAPHI-Q2?
    • J
      jwoodsAug 20, 2025
      If the SABINE Stereo Equalizer isn't removing feedback, check the filter availability and make sure the unit is not in BYPASS mode.
  • J
    joshua80Aug 22, 2025
    What causes feedback frequencies to cluster together on SABINE GRAPHI-Q2?
    • T
      Theresa Gutierrez DVMAug 22, 2025
      Feedback frequencies may cluster together on the SABINE Stereo Equalizer if there is a significant frequency "bump" in a room with less than ideal acoustics. Try using the graphic equalizer to "flatten" the room, addressing this with a wider filter.
  • R
    Ronald NielsenAug 25, 2025
    Why is the audio distorted when using SABINE GRAPHI-Q2?
    • W
      William JacksonAug 25, 2025
      Distorted audio when using the SABINE Stereo Equalizer is most likely caused by pushing a very hot signal into the unit. Although it’s hard to make the Graphi-Q clip, you should check connections for intermittence or check downstream from the Graphi-Q. Check the Graphi-Q output level and turn it up. Alternatively, the Graphi-Q may still be in Setup Mode, which automatically maximizes the Clip Level until the first dynamic FBX filter is set. You may exit Setup Mode in several ways.
  • T
    Timothy FreemanAug 26, 2025
    What to do if there is little or no audio coming from SABINE Graphi-Q output?
    • K
      Kevin LewisAug 26, 2025
      If you experience little or no audio from the SABINE Graphi-Q output, check the following: * Ensure connections are line level. * Verify input and output are not reversed. * Check if the Graphi-Q2 LEDs are showing signal. If not, ensure the unit is not in BYPASS mode and that an audio signal is feeding the Graphi-Q2 input. If yes, check connections and gain downstream from Graphi-Q2.
  • J
    James HernandezAug 28, 2025
    How to fix noisy audio with SABINE GRAPHI-Q2 Stereo Equalizer?
    • L
      Leslie MosesAug 28, 2025
      To troubleshoot noisy audio with the SABINE Stereo Equalizer, first bypass the Graphi-Q. If the noise persists, the issue is not with the Graphi-Q. If the noise disappears, check your gain structure, ensure the input level to the Graphi-Q is robust, and turn down the gain downstream.
  • E
    Elizabeth WebbAug 30, 2025
    What to do if SABINE GRAPHI-Q2 remote control doesn't work?
    • S
      Sherry SmithAug 30, 2025
      If the remote control for your SABINE Graphi-Q2 isn't working, check if your unit is in front-panel mode. Try loading any stored preset other than #1.
  • E
    Elaine VargasSep 2, 2025
    Why does audio "pump" or breathe when using SABINE GRAPHI-Q2 Stereo Equalizer?
    • R
      Rebecca MorrisSep 3, 2025
      If the audio "pumps" or breathes when using the SABINE Graphi-Q, check the Graphi-Q compressor settings.
  • J
    john87Sep 5, 2025
    Why does SABINE Graphi-Q appear to be catching feedback, but feedback is still present?
    • S
      Sherri FrancoSep 5, 2025
      If the SABINE Graphi-Q appears to be catching feedback, but feedback is still present, it could be due to one of the following reasons: * If you have the Graphi-Q patched in an effects or auxiliary loop, you will only catch the feedback in the effects loop, and not the mixer input channel. * You may have used up all the available FBX filters, leaving no additional filters for new feedback frequencies.
  • L
    Latasha WardSep 7, 2025
    How to fix SABINE Stereo Equalizer front panel controls that don't work?
    • M
      Michael HarrellSep 7, 2025
      If the front panel controls on your SABINE Stereo Equalizer aren't working, it's possible that your unit is (or was) connected to a GRQ2 Remote or switched via contact closure, which disables the front panel. To regain control, resume control via GRQ2 Remote or contact switch. In a pinch, short the extreme left & right pins of the back panel contact connector.
  • S
    Sarah ClineSep 9, 2025
    Why does signal lose gain going through SABINE Graphi-Q2?
    • A
      Amy BakerSep 9, 2025
      If the signal loses gain going through the SABINE Graphi-Q2, check the output level. Most likely, you are mixing balanced and unbalanced connections, which lowers gain by 6 dB.

Summary

SECTION THREE: FRONT AND BACK PANEL VIEWS

SECTION FOUR: BLOCK DIAGRAM;INTERNAL SIGNAL PATH

Section Five: Installation

Section Six: Using Graphi-Q2 Front Panel Controls

6.1. FRONT PANEL CALIBRATION

Calibrating front panel controls after firmware upgrades to ensure accuracy.

6.2. GRAPHIC EQUALIZER CONTROLS

Details on adjusting graphic EQ sliders, including boost/cut range and channel linking.

6.4. FEEDBACK CONTROL AND PARAMETRIC EQUALIZATION

Introduces FBX Feedback Exterminator and parametric EQ, defining key terms.

6.4.2. Front Panel Control of FBX filters

Explains front panel control of FBX filters, including LED indicators and feedback elimination steps.

6.4.2.2. Eliminating Feedback with the Graphi-Q2 FBX Filters

Provides step-by-step instructions for using FBX filters to eliminate feedback effectively.

6.5. COMPRESSOR;LIMITER CONTROLS

Details the front panel controls for the compressor and limiter functions.

Section Seven: GRQ2 Remote Software Installation

7.1. SYSTEM REQUIREMENTS AND RECOMMENDATIONS

Lists the necessary PC specifications and recommendations for installing the GRQ2 Remote software.

7.3. INSTALLING THE SOFTWARE

Provides step-by-step instructions for installing the GRQ-Remote Control Software from the CD-ROM.

Section Eight: Using GRQ2 Remote Software

8.1. WELCOME SCREEN;NETWORK CHAIN SCREEN

Introduces the initial screens of the GRQ2 Remote Software and connecting to Graphi-Q units.

8.2. GRQ2 MAIN SCREEN

Describes the main interface of the GRQ2 Remote Software for accessing vital functions.

8.2.5. FBX Feedback Exterminator & Parametric Filters

Covers advanced FBX and parametric filter controls available through the remote software.

8.2.5.1. Setting FBX Filters with Graphi-Q Remote Software

Details the Auto Setup and Manual Setup modes for configuring FBX filters using the software.

8.2.6. Crossover Adjustments

Explains how to adjust crossover settings, including slopes, filter types, and gain for outputs.

8.2.7. Compressor;Limiter Adjustments

Details how to adjust compressor and limiter parameters using the remote software interface.

8.3. LINKING PARAMETERS AND CONTROL WITH THE GRQ-REMOTE SOFT- WARE

Covers the powerful feature of linking multiple units and channels for synchronized control.

8.6. STORING AND RECALLING GRQ2 PRESETS

Details methods for storing and recalling system configurations and settings as presets.

8.8. PASSWORD PROTECTION WITH GRQ2 REMOTE SOFTWARE

Details the password protection levels and how to set or change passwords for software access.

8.10. UPGRADING GRAPHI-Q2 FIRMWARE & SOFTWARE

Explains how to upgrade the unit's firmware and the remote software using the Sabine Upgrade Wizard.

Section Nine: Suggestions for Optimal Use of the Graphi-Q

9.3. RECOMMENDED EQ USAGE

Offers recommendations for using graphic EQ, including setting range, boost/cut balance, and reference microphone use.

9.4. USING DIGITAL DELAY

Explains the importance and applications of digital delay in sound systems, including synchronization and comb filter distortion.

9.5. USING THE COMPRESSOR;LIMITER

Explains the function of compressors and limiters in controlling dynamic range and potential problems.

9.5.2. Compressor;Limiter Adjustments

Details the adjustments for compressor and limiter parameters like Output, Threshold, Ratio, and Knee.

Section Ten: Troubleshooting Tips

GRAPHI-Q2 REMOTE CONTROL SOFTWARE CANNOT FIND GRAPHI-Q UNIT(S)

Offers troubleshooting steps for connection issues, including software version, cable checks, and COM port refreshing.

Section Eleven: Graphi-Q2 Engineering Specifications

Section Twelve: Cautions & Warranty

SABINE GRAPHI-Q2 Specifications

General IconGeneral
BrandSABINE
ModelGRAPHI-Q2
CategoryStereo Equalizer
LanguageEnglish

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