OUTPUT
LEVEL
THRESHOLD
LEVEL
+15
dB
-15
0
RELEASE
BYPASS
CONTOUR
ATTACK
For more than 25 years dbx has been a leader in the audio industry with its outstanding compressors,
mic preamps and signal processing technology. The ÒSilver SeriesÓ serves to strengthen that reputation.
With innovative, state-of-the-art engineering, the 576 Vacuum Tube Preamp/Compressor carries the
dbx heritage into the vacuum tube arena. The 576 is generously appointed with all the features one
could possibly want in a preamp/compresssor combinaton. Features that include custom designed
analog VU meters that monitor tube level, insert path (or gain reduction, in the case of the compressor)
or output levels. The compressor side also has full sidechain functionality, including sidechain monitor,
and our unique Contour function, which allows low frequency material to pass through the threshold
without triggering unmusical compression effects. Also included are the dbx OverEasy¨ threshold
characteristic, and Auto attack and release. The preamp features +48V Phantom Power, 20dB pad,
phase invert, and low cut filter. Add to this impressive list of standard features extras like a three band
EQ with sweepable mid and selectable mid Q (with EQ hardwire bypass) on the preamp, available
insert loop, the ability to send the preamp signal directly to the compressor, and the new patent-pending
PeakPlusª limiting topology, and youÕve got a winner.
SC ENABLE
DRIVE
dB
+15
The premium 12AU7 vacuum tubes are hand selected for ideal triode gain matching, distortion, microphonics and drive characteristics. You get the best tube sound with the most versatility available today.
And with the optional dbx TYPE IVª Conversion System output, you can translate the essence of tube
processing directly to the digital world, without leaving the box. The digital output offers the ability to
communicate in either AES/EBU or S/PDIF at 16, 20, or 24 bit word lengths. In addition, TYPE IVª
offers the ability to select noise shape algorithms and dither types that best suit your music and your
medium. The 576 has all the rear panel versatility and connectivity that make it easy to setup and patch
into any system. Gold plated Neutrik¨ connectors for the audio ins and outs ensure solid connections
and pristine sound every time. Separate 1/4" connectors for the insert sends and returns, as well as
+4/-10 operating level switching make it a snap to use.
-15
0
+20
dB
-40
-10
-20
UNLINK
SHAPE
DITHER
OUTPUT
LEVEL
0
METER SOURCE
INSERT
LEVEL
¨
PREAMP
-5
DECIBELS
-20 -15 -10
DRIVE
LEVEL
-25
LEVEL
+15
dB
PHASE
8k
dB
dB
DRIVE
+60
LINE
+15
-10
dB
(LINE 0dB)
+25
dB
INSERT
-15
0
LOW
+15
+30
+48V
-15
0
MID
+15
PAD
NARROW
100
1k
200
FREQUENCY
4k
LOW CUT
-15
0
dB
-15
0
HIGH
+15
THRESHOLD
LIMIT
EQ
+5
0
+10
PEAK
dB Off
PeakPlus
+15
+20
-30
75 3
2010
-
0
3
+
TYPE IV
CONVERSION SYSTEM
Red: SNR2 Red: Shape 2
Green: TPDF Green: Shape 1
Off: None
Off: None
-
0
+
-30
THRESHOLD
OverEasy
0
+10 1.2:1
1.5:1
1:1
2:1
RATIO
SC MON
∞:1
3:1
6:1
1
.35
3 dB/mSec .04
.15
AUTO
125
50
250 dB/Sec 5
12.5
LIMIT
+5
0
+10
PEAK
dB
PeakPlus
Off
+15
+20
-30
DRIVE
LEVEL
METER SOURCE
INSERT
GAIN
REDUCTION
LEVEL
¨
DECIBELS
-25
75 3
2010
-
-20 -15 -10
0
-5
COMPRESSOR
0
3
+
576
Vacuum Tube
Preamp
Compressor
¨
¥ Hand selected Premium 12AU7 vacuum
tubes in path
¥ Mic or line/instrument inputs on the preamp.
+4/-10 operation
¥ Drive control for a wide variety of great
tube effects
¥ PeakPlusª limiting control on both preamp
and compressor
¥ 3-Band EQ with sweepable mid-frequency,
wide / narrow Q and hardwire bypass on the
preamp
¥ Complete sidechain, OverEasy¨, Auto, and
Contour functions on the compressor
¥ Optional TYPE IVª Conversion System
outputs
¥ Separate 1/4" insert send and return on the
preamp
¥ Custom designed analog VU meters monitor
tube drive, insert level, gain reduction, or
output levels
8760 S. Sandy Pkwy.
Sandy, Utah 84070
Phone (801) 568-7660
Fax (801) 568-7662
IntÕl Fax (219) 462-4596
customer@dbxpro.com
http://www.dbxpro.com
A Harman International Company
576
VACUUM TUBE PREAMP / COMPRESSOR
0
0
1k
0
200
INSERT
75 3
2010
EQ
NARROW
-15
dB
+15
-15
LOW
dB
+15
100
dB
8k
-15
FREQUENCY
MID
dB
-25
+15
+60
PAD
PHASE
LIMIT
+10
dB
+10 1.2:1
+15
+20
LEVEL
0
DRIVE
LEVEL
0
METER SOURCE
INSERT
LEVEL
50
.15
-40
dB
+20
TYPE IV
CONVERSION SYSTEM
PEAK
125
AUTO
∞:1
1:1
RATIO
3 dB/mSec .04
-25
OUTPUT
LEVEL
DITHER
SHAPE
250 dB/Sec 5
0
dB
SC MON
+15
DRIVE
CONTOUR
LINE INPUTS
Connectors:
Type:
Impedance:
Maximum Input Level:
OUTPUTS
Connectors:
Type:
Impedance:
Maximum Output Level:
INSERT
Connectors:
Type:
Impedance:
Nominal Send Level:
Nominal Return Level:
Female XLR Pin 2 hot and TRS 1/4Ó
Electronically balanced/unbalanced
20.1 k½ nominal, or 470 k½ with rear-panel
INST switch engaged
> +30 dBu, or +22 dBu with rear-panel
INST switch engaged
+10
TRS 1/4Ó
Impedance balanced/unbalanced (SEND),
electronically balanced/unbalanced
(RETURN)
100½ bal./50½ unbal. (SEND), 20k½
(RETURN)
+4 dBu
+4 dBu
+20
BYPASS
-15
dB
+15
COMPRESSOR
+15
0
LEVEL
dB
PeakPlus
DRIVE
LEVEL
METER SOURCE
INSERT
GAIN
REDUCTION
LEVEL
Vacuum Tube
Preamp
Compressor
OUTPUT
LEVEL
Off
THRESHOLD
EQUALIZER
LOW Frequency:
HIGH Frequency:
MID Frequency:
Gain (all bands):
COMPRESSOR
Treshold range:
Ratio:
Threshold Characteristic:
Attack/Release Characteristic:
Attack/Release Modes:
Manual Attack Time:
Manual Release Time:
Auto Attack Time:
Male XLR Pin 2 hot and TRS 1/4Ó
Servo-balanced/unbalanced, RF filtered
Balanced 120½, unbalanced 60½
+21.5 dBu, balanced or unbalanced
0
576
LIMIT
THRESHOLD
MICROPHONE INPUTS
Connectors:
Female XLR Pin 2 hot
Type:
Electronically balanced/unbalanced
Impedance:
1.70 k½
Optimum Microphone Impedance:
150 - 200 ½
Maximum Input Level:
> +13 dBu, or +33 dBu with 20 dB pad
engaged
CMRR:
> 115 dB at 60 Hz, > 110 dB at 1 kHz, >
75dB at 10 kHz
-5
¨
+5
SC ENABLE
-15
3
+
DECIBELS
RELEASE
ATTACK
0
UNLINK
0
-20 -15 -10
-30
Red: SNR2 Red: Shape 2
Green: TPDF Green: Shape 1
Off: None
Off: None
dB Off
PeakPlus
75 3
2010
-
12.5
6:1
OverEasy
-
-5
PREAMP
+15
LOW CUT
-15
DRIVE
DECIBELS
.35
3:1
1.5:1
1
¨
+5
dB
+
-20 -15 -10
0
-30
THRESHOLD
0
+48V
-10
0
2:1
-20
+
3
-30
+30
LINE
0
HIGH
(LINE 0dB)
+25
+15
-10
PEAK
4k
Auto Release Time:
Output Gain:
80 Hz, shelving filter
12 kHz, shelving filter
Sweepable from 100 Hz to 8 kHz,
bandwidth 1.5 octaves (WIDE) or 0.5
octaves (NARROW)
Sweepable from -15 to +15 dB.
SYSTEM PERFORMANCE
DRIVE Control Range:
LEVEL Control Range:
0.5 dB Bandwidth:
Frequency Response:
EIN:
THD + Noise:
-40dBu to +20dBu
1:1 to °:1
Selectable OverEasy¨ or hard knee curves
AutoDynamicª
Selectable Manual or Auto
Scalable program-dependent. Typically
3dB/ms to .04dB/sec
Scalable program-dependent. Typically
250dB/sec to 5dB/sec
Program-dependent. Typically 15ms for
10dB, 5ms for 20dB, and 3ms for 30dB
Program-dependent. Typically 125dB/sec
-15 to +15dB
PeakPlus LIMITER
Type:
Two-stage proprietary
Threshold Range:
+4 dBu to >+ 22 dBu (off)
Ratio:
°:1
Stage 1 Attack and Release Time: Zero
Stage 2 Attack Time:
Program-dependent, typically < 5ms
Stage 2 Release Time:
Program-dependent, typically 22dB/sec
Deviation From Linear Phase:
Interchannel Crosstalk:
POWER SUPPLY
Operating Voltage:
Power Consumption:
Fuse:
+10 dB to +60 dB
-15 dB to +15 dB
15 Hz to > 90 kHz +0/-0.5 dB
<10 Hz to >200 kHz +0/-3.0 dB
Typically -126 dBu, 150½ source
impedance, unweighted, 20 Hz to 20 kHz
measurement bandwidth
0.04% typical at +0 dBu out, 1kHz, 33 dB
gain
3.5% typical at +21 dBu out, 1kHz, 35 dB
gain
< 20 degrees, 20 Hz to 20 kHz.
Typically -98 dB, 20 Hz to 20 kHz.
Mains Connection:
100V, 120V, or 220-240VAC 50/60 Hz.
30 Watts maximum.
100V: 315mA 250V Slow Blow 5mm X
20mm
120V: 315mA 250V Slow Blow 5mm X
20mm
220-240V: T160 mA 250V 5mm X 20mm
IEC 320 Receptacle
PHYSICAL
Dimensions:
Weight:
Shipping Weight:
3.5" H X 19" W X 8" D
12 lbs (5.5 kg)
13 lbs (5.9 kg)
Note: 0 dBu = 0.775V RMS.
dbx engineers are constantly working to improve the quality of our products.
Specifications are, therefore subject to change without notice.
®
FOR MORE INFORMATION CONTACT:
dbx Professional Products
8760 S. Sandy Pkwy.
Sandy, Utah 84070
Phone (801) 568-7660
Fax (801) 568-7662
IntÕl Fax (219) 462-4596
customer@dbxpro.com
http://www.dbxpro.com