SABINE Graphi-Q2 3122-S - Manual (Page 16)

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B1-GRQ-2-OpGuide-v1-060519.pmd
6.4.2. Front Panel Control of FBX filters
Note: Most of the front panel and GRQ-Remote control operation of the FBX section of the Graphi-Q2
is similar, except that the remote control replaces your fingers with a mouse. In addition, there are some
controls offered only with GRQ-Remote software. These features are summarized in Section Eight.
Controls for the patented FBX Feedback Exterminator are located immediately to the right of the HIGH
and LOW CUT FILTERS.
6.4.2.1. FBX Filter LED Indicators
The 12 LEDs on the front panel Graphi-Q2 correspond to 12 available FBX filters. Each time an FBX
filter sets, another LED will light. A blinking LED indicates which filter was
most recently set or made deeper (a filter may start at one depth and notch
deeper at the same frequency as the system gain increases). The Graphi-
Q2 comes preset from the factory to a default setting of nine Fixed and
three Dynamic filters. However, you may follow the instructions in STEP
5 below to reconfigure the setup to be any combination of Fixed and
Dynamic filters.
6.4.2.2. Eliminating Feedback with the Graphi-Q2 FBX Filters
Follow these steps to obtain the maximum gain before feedback, with
minimal or no loss in the tonal quality of your program. The steps that
follow are applicable to setting up a one-channel unit (GRQ3121). When
using the GRQ3122, we recommend setting up one channel at a time by
turning down the other channel of the mixer or power amplifier. If you are
using both outputs of your GRQ3121, you may wish to turn down the
power amp gain for whichever output is less likely to produce feedback.
If both channels are equally feedback prone, leave the power amps
turned up. This will allow you to set filters that are specific to each channel
of your sound system.
STEP ONE: EQUIPMENT SETUP
Set up your sound system and position all the speakers and microphones you anticipate using. When
possible, avoid placing microphones directly in front of speakers.
STEP TWO: TURN OFF NOISE GATES
If there is any equipment in the signal path that incorporates a noise gate function, you MUST
DISENGAGE these noise gates prior to the setup procedure. You may reengage them upon setup
conclusion.
STEP THREE: GAIN DOWN, TURN ON
Set the master volumes on your mixer to their lowest gain positions. Turn on the mixer, then the Graphi-
Q2, then any other accessories, and finally your power amplifier. Adjust the gain settings and balance
for all your microphones, but keep your master mixer volume down.
STEP FOUR: RESET FILTERS
If there are FBX filters already set (indicated by illuminated LEDs), you should RESET these filters.
(NOTE: For maximum FBX power, we recommend resetting filters every time you change or move your
sound system.)
The Graphi-Q2 allows two stages of filter resetting. You may reset only the Dynamic filters, or you may
elect to reset all (both Fixed and Dynamic).
• To RESET DYNAMIC FILTERS ONLY, press and hold the RESET button long enough for the
Dynamic filter LEDs to flash three times, then release.
• To RESET ALL FILTERS, press and hold the RESET button for seven flashes of all the LEDs, then
release.
Note that resetting all filters automatically engages FBX Setup Mode, which will allow feedback to occur
and be removed more readily, and at a lower volume. “Setup Mode on” will be indicated by the Setup
LED (at the right of the front panel) illuminating.
NOTE: MAKE SURE Setup Mode IS OFF WHEN YOU USE THE Graphi-Q2 OR YOUR AUDIO SIGNAL
QUALITY MAY SUFFER! (See Section 6.4.2.3 Setup Mode Cautions)
S
ECTION
S
IX
: U
SING
G
RAPHI
-Q2 C
ONTROLS
NOTE: Setup steps continued on next page
IMPORTANT
Turbo Mode
needs QUIET.
No program,
talking, music
or loud room
noise!