Introduction; Inspection; Operating Controls - dbx 12 Series Operation Manual

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 C
PERATING ONTROLS
1231 - dual channel 31 band graphic equalizer
-10 0 +10 +18
+6
OUTPUT
LEVEL (dBu)
CLIP +/-15
0
+/-6 0
-12 +12
dB
EQ INPUT LOW RANGE
BYPASS GAIN CUT
-6
-10 0 +10 +18
+6
OUTPUT
LEVEL (dBu)
CLIP +/-15
0
+/-6
0
-12 +12
dB
EQ INPUT LOW RANGE
BYPASS GAIN CUT
-6
1215 - dual channel 15 band graphic equalizer
-10 0 +10 +18
+6
OUTPUT
LEVEL (dBu)
CLIP +/-15
0
+/-6
-12 +12
dB
EQ INPUT LOW RANGE
BYPASS GAIN CUT
2
20 25 31.5 40 50 63 80 100 125 160 200
25 40 63 100 160 250 400 630 1k 1.6k 2.5k 4k 6.3k
0
-6
250 315 400 500 630 800 1k 1.25k 1.6k 2k
10k 16k 25 40
-10 0 +10 +18
+15 +6
OUTPUT
LEVEL (dBu)
CLIP +/-15
0
0 +/-6 0
-12 +12
dB
EQ INPUT LOW RANGE
BYPASS GAIN CUT
-15 -6
®
Front Panels
+15
0
-15
2.5k 3.15k 4k 5k 6.3k 8k 10k 12.5k 16k 20k
+15
0
-15
63 100 160 250 400 630 1k 1.6k 2.5k 4k 6.3k 10k 16k
+15
0
-15
1231
Graphic Equalizer
1215
Graphic Equalizer