Ntroduction, Nspection, Perating – dbx Pro 12 Series User Manual
Page 6: Ontrols, Front panels, Operation manual
I
NTRODUCTION
Congratulations on your purchase of a dbx graphic equalizer. All dbx graphic equalizers are high performance
multi-functional units designed to deliver all the flexibility and power that professional users demand. We recom-
mend that you take a moment to read through this operation manual. It provides information that will assist you
from system set-up to EQ applications. The 12 Series Equalizers include the following features:
• Switchable Boost/Cut range between ±6dB and ±15dB
• Balanced inputs and outputs
• XLR, Barrier Strip, and 1/4" TRS connectors
• -12dB/+12dB input gain range
• 18dB/octave 40Hz Bessel Low-Cut filter
• Chassis/signal ground lift capability
• Internal power supply transformer
• Power-off hard-wire relay bypass with 2-second power-up delay
I
NSPECTION
Verify that the equalizer’s package contains the following:
• Equalizer unit matching serial number marked on package
• AC power cord
• Operation Manual
• Registration Card
• Four rack mount screws and washers
If any of these items are missing please contact dbx customer service at the number provided on the back cover of
this manual.
O
PERATING
C
ONTROLS
Front Panels
1231 - dual channel 31 band graphic equalizer
1215 - dual channel 15 band graphic equalizer
2
®
OPERATION MANUAL
1231
Graphic Equalizer
20
25
31.5
40
50
63
80
500
400
315
250
1.6k
1.25k
1k
800
5k
4k
3.15k
2.5k
16k
12.5k
10k
8k
6.3k
20k
2k
630
100
125
160
200
RANGE
OUTPUT
LEVEL (dBu)
LOW
CUT
EQ
BYPASS
INPUT
GAIN
dB
-12
0
+12
+/-6
+/-15
CLIP
+18
+10
0
-10
RANGE
OUTPUT
LEVEL (dBu)
LOW
CUT
EQ
BYPASS
INPUT
GAIN
dB
-12
0
+12
+/-6
+/-15
CLIP
+18
+10
0
-10
0
-15
+15
0
-15
+15
0
-6
+6
0
-6
+6
RANGE
OUTPUT
LEVEL (dBu)
LOW
CUT
EQ
BYPASS
INPUT
GAIN
dB
-12
0
+12
+/-6
+/-15
CLIP
0
-6
+6
25
40
63
100
160
250
400
16k
10k
6.3k
4k
630
1k
1.6k
2.5k
+18
+10
0
-10
1215
Graphic Equalizer
0
-15
+15
RANGE
OUTPUT
LEVEL (dBu)
LOW
CUT
EQ
BYPASS
INPUT
GAIN
dB
-12
0
+12
+/-6
+/-15
CLIP
0
-6
+6
25
40
63
100
160
250
400
16k
10k
6.3k
4k
630
1k
1.6k
2.5k
+18
+10
0
-10
0
-15
+15