dbx 2215 Installation and operation manual

8760 S. Sandy Pkwy.
Sandy, Utah 84070
Phone [phone]
Fax [phone]
Int’l Fax [phone]
[e-mail]
http://www.dbxpro.com
A Harman International Company
®
RANGE
GAIN
REDUCTION (dB)
OUTPUT
LEVEL (dBu)
LOW
CUT
EQ
BYPASS
TYPE
III
NR
INPUT
GAIN
dB
-12
0
+12
PeakPlus
THRESHOLD
dBu
0 OFF
+20+5
+15+10
+/-6
+/-15
CLIP
1
0
-6
+6
25 40 63 100 160 250 400 16k10k6.3k4k630 1k 1.6k 2.5k
3610+18+100-10
2215
Equalizer/Limiter
with TYPE
III
NR
0
-15
+15
RANGE
GAIN
REDUCTION (dB)
OUTPUT
LEVEL (dBu)
LOW
CUT
EQ
BYPASS
TYPE
III
NR
INPUT
GAIN
dB
-12
0
+12
PeakPlus
THRESHOLD
dBu
0 OFF
+20+5
+15+10
+/-6
+/-15
CLIP
1
0
-6
+6
25 40 63 100 160 250 400 16k10k6.3k4k630 1k 1.6k 2.5k
3610+18+100-10
0
-15
+15
CHANNEL ONE CHANNEL TWO
It’s amazing. One little button. So much effect. dbx Type III Noise Reduction is an entirely new con-
cept... virtually instantaneous encode/decode within the circuitry of the box. We started out to build the
finest EQs possible, boxes with the heritage and performance to rival our famous 30 Series EQs. And
to no one’s surprise they came out awfully darn good. (Ask to see the Audio Precision plots compared
to the competition.) But then, Roger (our chief engineer, a nice guy, as far as engineers go) got the crazy
idea of putting this new noise reduction stuff in the box. We listened to it and were amazed. The EQs
sounded great without it but with it the performance was nothing short of incredible. Check it out your-
self and see.
But hey, Roger wasn’t about to stop there. PeakPlus™ Limiter. Who knows more about limiting than
the folks at dbx; nobody... that’s who. So when the guys were developing this new series of EQs they
wanted something that would be unique to these EQs. That’s when Roger got another one of his bright
ideas and said “I bet they’ll work a lot better if there’s a cool limiter built in.” Next thing you know, all
the guys are in the studio amazed at the new limiter Roger had designed specially for the 20 Series.
Once again, hearing is believing... With a threshold range of 0dbu to plus 20dbu, the patent-pending
PeakPlus™ limiter is designed to tame your program material from the subtlest nuances to the rowdi-
est hits. Also, the four stage LED ladder gives you a great visual indication as to what the limiter is
doing.
20 Series EQs. You used to have to settle for second best in a reasonably priced EQ but not any more.
With the new 20 Series from dbx Professional Products you get a great EQ circuit, a graceful yet pow-
erful limiter and the revolutionary new design of the Type III Noise Reduction. Check out the dbx 20
Series graphic EQs at your pro audio outfitter. You’ll see, with the 20 Series EQs you get MORE!!!
18-1721-B 01/99
• Revolutionary instant encode/decode
Type III Noise Reduction in-circuit at
the push of a button. Increases S/N
ratio by up to 20dB.
• Patent-pending PeakPlus™ Limiter
threshold range from 0dBu to +24dBu
(off) can transparently tame the
wildest hits or the subtlest nuances of
any signal.
• An extremely high quality EQ, patent-
pending TYPE III Noise Reduction,
and the elegant new PeakPlus™
Limiter all in one great sounding box.
• Four segment LED bargraph for
BOTH Gain Reduction AND Output
Level offers the most comprehensive
visual feedback available.
• Status LEDs offer visual feedback for
all settings on the front panel.

A Harman International Company
The graphic equalizer shall be a dual 15-band type with frequency centers on
standard ISO two-thirds octave frequencies ranging from 25Hz to 16kHz. The
boost/cut ranges shall be switchable via recessed front panel switches to either
+/-6dB or +/-15dB and the selected range shall be indicated on the front panel by
either of two LEDs per channel. Low-noise equalization sliders having a 45mm
travel shall be utilized having center detents at 0dB. The equalizer shall have
front panel 41-detent rotary input gain controls having a +/-15dB range.
Bypassing the equalizer sections of the signal path shall be accomplished via
front-panel switches having corresponding LEDs to indicate when each channel
is bypassed. A 40Hz low-cut Bessel filter per channel with 18dB/octave slope
shall be insertable in the signal path via front panel recessed switches with an
LED to indicate when the filter is active.
The graphic equalizer shall incorporate dbx Type III™ Noise Reduction provid-
ing up to 20dB of broadband noise reduction, having front panel switches to
enable the noise reduction and LEDs to indicate when it is active. The equaliz-
er shall also be equipped with dbx PeakPlus™ limiters having front panel 41-
detent rotary limiter threshold controls varying from 0 to +24dBu (off) and four-
LED gain reduction bar graphs calibrated to read 0, 3, 6, and 10dB. Output lev-
els shall be monitored on four-LED peak-reading bar graphs calibrated to read -
10, 0, +10, and +18dBu.
Electronically balanced/unbalanced inputs shall include 1/4" TRS, female XLR,
and screw terminal barrier strip, while servo-balanced/unbalanced outputs shall
include 1/4" TRS, male XLR, and screw terminal barrier strip shared with the
input. A circuit/chassis ground lift jumper per channel shall be strapped across
circuit ground and chassis ground screw terminals and shall be removable by the
user. Inputs shall be electronically balanced/unbalanced and RF filtered having
a nominal input impedance not less than 40kΩbalanced and 20kΩunbalanced,
and shall accept maximum signal levels of not less than +21dBu. Outputs shall
be servo-balanced/unbalanced and RF filtered having a nominal output imped-
ance of not more than 200Ωbalanced and 100Ωunbalanced, and shall be capa-
ble of driving not less than +21dBu into 2kΩor greater and not less than
+20dBm (into 600Ω) continuously.
Frequency response shall be better than 10Hz to 50kHz, +0.5/-3dB. Signal-to-noise
ratio shall be greater than 90dB, referenced to +4dBu, in either boost/cut range with noise reduction disabled and shall be greater than 102dB
with noise reduction enabled. THD+Noise shall be less than 0.04% with a 1kHz signal at +4dBu, while interchannel crosstalk shall be lower
than -80dB from 20Hz to 20kHz.
The internal power supply shall be constructed using a thermally-fused transformer mounted in a low hum orientation and shall be magnet-
ically isolated from equalizer circuitry by means of a mu-metal shield. The power cord shall be detachable from an international standard
IEC 320 power inlet receptacle. Unit shall be constructed to meet or exceed all applicable international safety and regulatory agencies.
Domestic unit shall be powered from 100VAC 50/60Hz, 120VAC 60Hz, while international unit shall be powered from 230VAC 50/60Hz.
Unit shall consume no more than 28W. Housing shall be of all steel/aluminum construction and shall be rack-mountable in an IEC standard
19" rack and shall occupy a 2U (3.5") rack space. The unit shall be a dbx 2215 Equalizer/Limiter with Type III Noise reduction.
dbx engineers are constantly working to improve the quality of our products. Specifications are, therefore subject to change without notice.
DUAL CHANNEL 15 BAND EQUALIZER / LIMITER WITH TYPE III NOISE REDUCTION
2215
RANGE
CHANNEL ONE
GAIN
REDUCTION (dB)
OUTPUT
LEVEL (dBu)
LOW
CUT
EQ
BYPASS
TYPE III
NR
INPUT
GAIN
dB
-12
0
+12
PeakPlus
THRESHOLD
dBu
0 OFF
+20+5
+15+10
+/-6
+/-15
CLIP
1
0
-6
+6
25 40 63 100 160 250 400 16k10k6.3k4k630 1k 1.6k 2.5k
3610+18+100-10
2215
Equalizer/Limiter
with TYPE III NR
0
-15
+15
RANGE
CHANNEL TWO
GAIN
REDUCTION (dB)
OUTPUT
LEVEL (dBu)
LOW
CUT
EQ
BYPASS
TYPE III
NR
INPUT
GAIN
dB
-12
0
+12
PeakPlus
THRESHOLD
dBu
0 OFF
+20+5
+15+10
+/-6
+/-15
CLIP
1
0
-6
+6
25 40 63 100 160 250 400 16k10k6.3k4k630 1k 1.6k 2.5k
3610+18+100-10
0
-15
+15
OUTPUT INPUT
PHONE:
TIP
RING
SLEEVE
XLR:
PIN 1
PIN 2
PIN 3
CONNECTOR POLARITY
INPUTOUTPUT
OUTPUT INPUT
INPUTOUTPUT
PROFESSIONAL PRODUCTS
A HARMAN INTERNATIONAL
COMPANY
MODEL 2215
EQUALIZER/LIMITER WITH
TYPE III NOISE REDUCTION
WARNING:TOREDUCETHE RISK OF FIRE ORELECTRIC
SHOCKDONOT EXPOSE THIS EQUIPMENT TORAINORMOISTURE
RISKOFELECTRIC SHOCK
DONOTOPEN
ATTENTION:RISQUE DE CHOC ELECTRIQUE-NEPAS OUVRIR
CAUTION:TOREDUCE
THERISKOFFIREREPLACE
ONLYWITH SAME TYPEFUSE.
ATTENTION:UTILISER
UNFUSIBLEDERECHANGEDE
MEMETYPE.
POWER
100V 50/60Hz
120V 60Hz
MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING
U.S. PATENTS: 4,234,804 4,316,107 4,329,598 4,331,931 4,377,792
4,403,199 4,409,500 4,425,551 4,434,380 4,454,433 4,471,324
4,473,793 OTHER PATENTS PENDING
OUTPUT
- +
INPUT
- +
OUTPUT
- +
INPUT
- +
CHANNEL 1
CHANNEL 2
Inputs
Connectors: 1/4” TRS, female XLR (pin 2 hot), and
barrier terminal strip
Type: Electronically balanced/unbalanced, RF
filtered
Impedance: Balanced 40kΩ, unbalanced 20kΩ
Max Input Level: >+21dBu balanced or unbalanced
CMRR: >40dB, typically >55dB at 1kHz
Outputs
Connectors: 1/4” TRS, male XLR (pin 2 hot), and bar-
rier terminal strip
Type: Impedance-balanced/unbalanced, RF fil-
tered
Impedance: Balanced 200Ω, unbalanced 100Ω
Max Output Level: >+21dBu balanced/unbalanced into 2kΩ
or greater
>+18dBm balanced/unbalanced (into
600Ω)
System Performance
Bandwidth: 20Hz to 20kHz, +/-0.5dB
Frequency Response: <10Hz to >50kHz, +0.5/-3dB
Noise Reduction In (+/-6 and +/-15dB range):
Signal-to-Noise: >102dB, unweighted, ref: +4dBu, 22kHz
measurement bandwidth
Dynamic Range: >120dB, unweighted
Noise Reduction Out: (+/-6dB range):
Signal-to-Noise: >94dB, unweighted, ref: +4dBu, 22kHz
measurment bandwidth
Dynamic Range: >112dB, unweighted
Noise Reduction Out: (+/-15dB range):
Signal-to-Noise: >90dB, unweighted, ref: +4dBu, 22kHz
measurement bandwidth
Dynamic Range: >108dB, unweighted
THD+Noise: <0.04%, 0.02% typical at +4dBu, 1kHz
Interchannel Crosstalk: <-80dB, 20Hz to 20kHz
Noise Reduction: Up to 20dB of dynamic broadband noise
reduction
Function Switches
Type III NR: Activates dbx Type III Noise Reduction
EQ Bypass: Bypasses the graphic equalizer section in
the signal path
Low Cut (recessed): Activates the 40Hz 18dB/octave Bessel
high-pass filter
Range (recessed): Selects either +/- 6dB or +/- 15dB slider
boost/cut range
Indicators
Output Level Meter: 4-LED bar graph (Green, Green, Yellow,
Red) at -10, 0, +10, and +18dBu
Gain Reduction Meter: 4-LED bar graph (all Red) at 0, 3, 6, and
10dB
Type III NR Active: Yellow LED
EQ Bypass: Red LED
Clip: Red LED
Low Cut Active: Red LED
+/-6dB range: Yellow LED
+/-15dB range: Red LED
Power Supply
Operating Voltage: 100VAC 50/60Hz, 120VAC 60Hz
230VAC 50/60Hz
Power Consumption:8W
Mains Connection: IEC receptacle
Physical
Dimensions: 3.5" H X 19" W X 7.9" D (8.9cm x 48.3cm
x 20.1cm)
Weight: 8.5 lbs. (3.9 kg)
Shipping Weight: 9.5 lbs. (4.3 kg)
Note: Specifications subject to change.
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FOR MORE INFORMATION CONTACT:
dbx Professional Products
8760 S. Sandy Pkwy.
Sandy, Utah 84070
Phone [phone]
Fax [phone]
Int’l Fax [phone]
[e-mail]
http://www.dbxpro.com