dbx Pro 1046 Fascicule

The compressor/limiter shall have four identical chan-
nels, each with an audio frequency response of 20Hz to
25kHz, +0/-0.5dB , an electronically floating balanced
input impedance of not less than 50kΩ, balanced and
20kΩ unbalanced, and a maximum input level of not less
than +22dBu and 1/4" TRS and XLR connectors.  The
output shall have an impedance of no more than 30Ω
with a maximum output level of not less than +22dBm
balanced and +20dBm unbalanced, into a minimum load
impedance of 600Ω and 1/4” TRS and XLR type con-
nectors.  

Total Harmonic Distortion plus Noise shall be less than
0.1% with any amount of compression (up to 40dB) at
1kHz and Intermodulation Distortion shall be less than
0.1% SMPTE.  The unit shall have an Equivalent Input
Noise level of not more than -96dBu unweighted, and a
dynamic range of not less than 118dB.  Output gain
adjustment shall be variable from -20 to +20dB.  The
compression threshold range shall be variable from -40 to
+20dBu and compression ratio shall be variable from 1:1
to ∞:1.  The peak limiter threshold range shall be variable
from 0 to +24dBu.  The compressor attack and release
times shall be program dependent. The compression ratio
characteristic shall be selectable for either the hard or soft
knee curve type with a maximum compression of no less
than 60dB.    All input and output signal connections shall
be via the rear panel. The channel-to-channel stereo links
shall be of the true RMS summing type.  Channel 1 shall
link to Channel 2 and Channel 3 shall link to Channel 4
with channels 1 and 3 becoming the masters. The unit
shall have the following front panel switches for each
channel, with each switch incorporating an integral LED
to signal selection of that switch:  OverEasy, I/O Meter,
and Bypass.  There shall also be one Stereo Link switch
for each pair of channels. Each channel shall have the fol-
lowing identical controls:  compression Threshold, com-
pression Ratio, compression Output Gain,  limiter Threshold; and the following identical metering and indicator LEDs for each channel: Gain Reduction (8 LEDs), Input
or Output Level (8 LEDs), peak limiter active.  There shall be a rear panel switch for each channel to select nominal input and output operating levels at -10dBV or +4
dBu. The unit shall be capable of accepting one compatible audio transformer installed for each channel. The power requirements shall be 100-120VAC 50/60Hz or 200-
240VAC, 50/60Hz, 20W, via  a detachable IEC type AC cable.  The size of the unit shall be 1.75" x 19" x 7.9" (4.4cm x 48.3cm x 20.1cm) with a net weight of 5.2 lbs
(2.4 kg) and a shipping weight of 7.6 lbs (3.5 kg).  The 1U high, full rack width 4 channel compressor/limiter shall be a dbx 1046.

Connectors:

XLR and 1/4" TRS (Pin 2 and

tip hot)
Type: Electronically 

balanced/unbal-

anced, RF filtered
Impedance:

Balanced > 40 kOhm, unbal-

anced >20 kOhm
Max Input Level:

> +22 dBu balanced or unbal-

anced
CMRR:

Typically >50 dB at 1 kHz

Connectors:

XLR and 1/4" TRS (Pin 2 and

tip hot)
Type:

Servo-balanced/unbalanced,

RF filtered
Impedance:

Balanced 30 Ohm, unbal-

anced 15 Ohm
Max Output Level:

> +22 dBm balanced, > +20

dBm unbalanced

Bandwidth:

20 Hz to 20 kHz, +0/-0.5 dB

Frequency Response:

0.35 Hz to 90 kHz, +0/-3 dB

Noise:

< -96 dBu, unweighted, 22
kHz measurement bandwidth

Dynamic Range:

> 118 dB, unweighted

THD+Noise:

0.008% typical at +4 dBu, 1

kHz unity gain

0.08% typical at +20 dBu, 1

kHz, unity gain

< 0.1% any amount of com-

pression up to 40 dB, 

1 kHz

IMD:

< 0.1% SMPTE

Interchannel Crosstalk:

< -80 dB 20 Hz to 20 kHz

Stereo Coupling:

True RMS Power Summing

Threshold Range:

-40 dBu to +20 dBu

Ratio:

1:1 to ∞:1

Threshold Characteristic:

Selectable OverEasy® or

hard knee
Attack/Release Characteristic:

AutoDynamic™

Attack Time:

Program-dependent

Release Time:

Program-dependent

Output Gain:

-20 to +20 dB

Threshold Range:

0 dBu to +24 dBu (off)

Ratio:

∞:1

Limiter Type:

PeakStopPlus™ two-stage

limiter
Stage 1:

PeakStop® brickwall limiter

Attack Time:

Zero

Release Time:

Zero

Stage 2:

Predictive intelligent program

limiter

Attack Time:

Program-dependent

Release Time:

Program-dependent

OverEasy®:

Activates the OverEasy®

compression function.
I/O Meter:

Switches between monitoring

input and output 

levels

on the Input/Output Level meter.
Bypass:

Activates the direct input-to-

output hard-wire 

bypass.

Operating Level

(rear panel):

Switches the nominal operat-
ing level between -10 dBV
and +4 dBu simultaneously
for both input and output lev-
els.

ST Link:

Links channels in stereo

pairs.  Channels One 

and Three become the mas-

ter channels.

Gain Reduction   Meter:

8 segment LED bar graph at
1, 3, 6, 10, 15, 20,
25, and 30 dB

Input/Ouptut   Meter:

8-segment LED bar graph at
-24, -18, -12, -6, 0,
+6, +12, and +18 dBu

PeakStop®:

1 LED to indicate PeakStop®

limiting
Function Switches:

LED indicator for each front-

panel switch

Output Transformer

Per Channel:

Jensen® JT-123-dbx or JT-
11-dbx, BCI™ RE-
123-dbx or RE-11-dbx

Operating Voltage:

Switchable: 100-120 VAC 50-
60 Hz or 200-240 VAC 50/60
Hz

Power Consumption:

20 Watts

Fuse:

100-120 VAC:250 mA Slow

Blow

200-240 VAC: 125 mA Type T

Mains Connection:

IEC receptacle

Dimensions:

1.75"Hx19"Wx9"D

(4.4cmx48.3cmx20.1cm)
Weight:

5.2 lbs. (2.4 kg)

Shipping Weight:

7.6 lbs. (3.5 kg)

Note:  Specifications subject to change.

+

+

+

+

CHANNEL ONE

INPUTS

OUTPUTS

OPERATING

LEVEL

+4 dBu

-10 dBV

CHANNEL TWO

INPUTS

OUTPUTS

OPERATING

LEVEL

+4 dBu

-10 dBV

CHANNEL THREE

INPUTS

OUTPUTS

OPERATING

LEVEL

+4 dBu

-10 dBV

CHANNEL FOUR

INPUTS

OUTPUTS

OPERATING

LEVEL

+4 dBu

-10 dBV

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

®

A Harman International Company

dbx Professional Products • 8760 S. Sandy Pkwy. • Sandy, Utah 84070

Phone (801) 568-7660 • Fax (801) 568-7662 • Int’l Fax (801) 568-7583

customer@dbxpro.com • http://www.dbxpro.com

dbx engineers are constantly working to improve the quality of our products. Specifications are, therefore subject to change without notice.