dbx DriveRack PA User Manual page 17

DriveRack
DriveRack PA WIZARD
System Setup
Auto EQ WIZARD
AFS WIZARD
DriveRack PA WIZARD
System Setup
Auto EQ WIZARD
AFS WIZARD
Input Setup
• Press the <NEXT PG> button and the display will read:
Select Input as MONO
or STEREO.
>STEREO
DriveRack PA WIZARD
System Setup
Auto EQ WIZARD
AFS WIZARD
Auto EQ
Connect mic to RTA
input. Press RTA
• Once the gain level of the mixer has been turned down, press the <NEXT PG> but-
input button.
ton and the display will read:
AFS
Please turn down the
mixer gain. Press
NEXT PG when done.
• You will now use the <DATA> wheel to select the number of fixed filters. This will
range from values 0-12. The total number of filters will stay at 12, and the number of
live filters will be = Total Num Filters – Num Fixed. Live and Fixed filter types differ
in that FIXED mode filters are automatically assigned to a frequency creating feedback,
thus remaining at that frequency until cleared by the user. In LIVE mode, live filters
Graphic EQ Setup
automatically detect and remove feedback frequencies in the presence of audio (music
Select GEQ as Dual
or speech). When all of the live filters have been used, they begin to round robin.
Mono or Stereo
Essentially this means that the first filter set is replaced where a new feedback is detect-
>Dual Mono
ed and notched out. This mode is useful because feedback frequencies may change
as the microphone is moved, and/or as the characteristics of the venue change.
Auto EQ Warning
The Fixed/Live filter usage will be indicated at the bottom of each page of the feed-
back elimination effect. 'F' indicates an available fixed filter, and 'L' indicates an avail-
RTA INPUT button
able live filter. A blocked out F or L indicates a filter that is set, or in use. Once the
must be pressed.
desired number has been selected, press the <NEXT PG> and the display will read:
AFS
Select Number of
fixed filters. > 6
F F F F F F L L L L L L
®
• These types pertain to the Q, sensitivity, and algorithm type. The filter is established
by using the formula: Q= Freq divided by Bandwidth. This means that a higher Q
will produce a filter that is more narrow. Values are: Speech (Bandwidth = 1/5
octave and Q=7.25) Music Low (Narrow notch filter, Bandwidth = 1/10 octave and
Q=14.5), Music Medium (Very Narrow notch filter, Bandwidth = 1/20 octave and
®
Q=29) Music High (Ultra Narrow notch filter, Bandwidth = 1/80 octave and Q=116).
To guarantee that feedback is suppressed at lower frequencies, the AFS may place
wider notch filters at these lower frequencies (below 700 Hz). Once the desired fixed
®
DriveRack PA WIZARD
System Setup
®
PA
Auto EQ WIZARD
Input Setup
Select Input as MONO AFS WIZARD
or STEREO.
>STEREO
DriveRack PA WIZARD
System Setup
Auto EQ WIZARD
Auto EQ
AFS WIZARD
Connect mic to RTA
input. Press RTA
input button.
Graphic EQ Setup
Select GEQ as Dual
Mono or Stereo
>Dual Mono
AFS
Please turn down the
mixer gain. Press
NEXT PG when done.
Auto EQ
RTA INPUT
must be pressed.
AFS
Select Number of
fixed filters. > 6
F F F F F F L L L L L L
Main Speaker
Select Main PA
JBL SRX
>SR4702X Passive
Auto EQ : Pink Noise
Mic Level
Turn Up Level
Pink Level > 18dB
AFS
Select fixed type
> Speech
®
Auto EQ
Connect mic to RTA
input. Press RTA
Graphic EQ Setup
Getting Started
input button. Select GEQ as Dual
Mono or Stereo
>Dual Mono
AFS
Please turn down the
mixer gain. Press
Auto EQ
NEXT PG when done.
RTA INPUT
must be pressed.
Main Speaker
Select Main PA
JBL SRX
>SR4702X Passive
AFS
Select Number of
fixed filters. > 6
F F F F F F L L L L L L
Warning Auto EQ
Mic Level
button Turn Up Level
Pink Level > 18dB
AFS
Select fixed type
> Speech
Sub Speaker
Select Sub PA
>None
L
Auto EQ
Slowly Increase the
mixer gain to
desired level.
®
®
DriveRack
Section 1
Warning
button
: Pink Noise
R
F F F F F F L L L L L L
® PA User Manual
Auto EQ Warnin
RTA INPUT butto
Main Speaker
must be pressed. Select Main PA
JBL SRX
>SR4702X Passi
AFS
Select Number of
fixed filters.
Auto EQ : Pink
F F F F F F L L L
Mic Level
Turn Up Level
Pink Level > 1
Sub Speaker
Select Sub PA
>None
AFS
Select fixed ty
> Speech
L R
Auto EQ
Slowly Incre
mixer gain t
desired leve
F F F F F F L
High Amplifie
Select an amp
>Crwn MacroTe
Auto EQ : P
Mic Level
Turn Up Lev
Pink Level
AFS
Fixed Filte
Done
F F F F F F
9