I Ntroduction; I Nspection; O Perating C Ontrols - Harman dbx 20 Serie Modo De Empleo

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 recommend 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 20 Series Equalizers include the following features:
• R evolutionary dbx TYPE III™ Noise Reduction capable of restoring up to 20dB S/N ratio
• P roprietary patent-pending PeakPlus™ Limiter for system protection
• S witchable range between ±6dB and ±15dB
• B alanced inputs and outputs
• XLR, Barrier Strip, and 1/4" TRS connectors
• - 12dB/+12dB input gain range
• 1 8dB/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
2031 - single channel 31 band graphic equalizer
-10 0 +10 +18 10 6 3 1
+6
OUTPUT GAIN
LEVEL (dBu) REDUCTION (dB)
CLIP +/-15
0
+10 +15
+/-6 0
+5 +20
-12 +12
0 OFF
dB dBu
III
TYPE EQ INPUT LOW PeakPlus RANGE
NR BYPASS GAIN CUT THRESHOLD
-6
85-2564-A0 2031 FRONT ART 12-16-96
2231 - dual channel 31 band graphic equalizer
-10 0 +10 +18 10 6 3 1
+6
OUTPUT GAIN
LEVEL (dBu) REDUCTION (dB)
CLIP +/-15
0
+10 +15
+/-6 0
+5 +20
-12 +12
0 OFF
dB dBu
III
TYPE EQ INPUT LOW PeakPlus RANGE
NR BYPASS GAIN CUT THRESHOLD
-6
-10 0 +10 +18 10 6 3 1 +6
OUTPUT GAIN
LEVEL (dBu) REDUCTION (dB)
CLIP +/-15
0
+10 +15
+/-6 0
+5 +20
-12 +12
0 OFF
dB dBu
III
TYPE EQ INPUT LOW PeakPlus RANGE
NR BYPASS GAIN CUT THRESHOLD
-6
85-2568-A0 2231 FRONT ART 12-16-96
2
ontrols
20 25 31.5 40 50 63 80 100 125 160 200
20 25 31.5 40 50 63 80 100 125 160
250 315 400 500 630 800 1k 1.25k 1.6k 2k
200 250 315 400 500 630 800 1k 1.25k 1.6k 2k
Front Panels
2.5k 3.15k 4k 5k 6.3k 8k 10k 12.5k 16k 20k
+15
0
-15
+15
0
-15
2.5k 3.15k 4k 5k 6.3k 8k 10k 12.5k 16k 20k
+15
0
-15
2031
Equalizer/Limiter
III
with TYPE NR
2231
Equalizer/Limiter
III
with TYPE NR