dbx 576 User manual

8760 S. Sandy Pkwy.
Sandy, Utah 84070
Phone [phone]
Fax [phone]
IntÕl Fax [phone]
[email protected]
http://www.dbxpro.com
A Harman International Company
¥ 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
SHAPEDITHER
576
Vacuum Tube
Preamp
Compressor
DRIVE
dB
-10
+15
+25
(LINE 0dB)
+60
+30
LOW
dB
-15
0
+15
PHASE LOW CUT+48V
MID
dB
-15
0
+15
FREQUENCY
dB
100
200
1k
8k
4k
NARROW
HIGH
dB
-15
0
+15
LINE
INSERT EQ
LEVEL
dB
-15
0
+15
PeakPlus
THRESHOLD
dB
0
+5
+10
Off
+20
+15
PAD
Off: None Off: None
Green: TPDF Green: Shape 1
Red: SNR2Red: Shape 2
TYPE IV
CONVERSION SYSTEM
INSERT
LEVEL
METER SOURCE
DRIVE LEVEL OUTPUT
LEVEL INSERT
LEVEL
METER SOURCE
DRIVE LEVEL OUTPUT
LEVEL
LIMIT
PEAK
PREAMP
2010 75303+
-
¨
DECIBELS
-15
-20 -10
-25 -5
-30 0
DRIVE
dB
-15
0
+15
THRESHOLD
dB
-40
-30
-20 0
0
-
-10
+
+10
+20
CONTOUR BYPASSSC ENABLE
RATIO
1:1
1.2:1
1.5:1 2:1 3:1
6:1
∞:1
ATTACK
dB/mSec
3
1
.35
.04
.15
OverEasy
RELEASE
dB/Sec
250
125 12.5
50
5
UNLINK
AUTO
LEVEL
dB
-15
0
+15
PeakPlus
THRESHOLD
dB
0
+5
+10
Off
+20
+15
SC MON
LIMIT
PEAK
COMPRESSOR
2010 75303+
-
¨
DECIBELS
-15
-20 -10
-25 -5
-30 0
GAIN
REDUCTION
METER SOURCE
DRIVE LEVEL OUTPUT
LEVEL
¨
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.
The premium 12AU7 vacuum tubes are hand selected for ideal triode gain matching, distortion, micro-
phonics 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.

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
LINE INPUTS
Connectors: Female XLR Pin 2 hot and TRS 1/4Ó
Type: Electronically balanced/unbalanced
Impedance: 20.1 k½ nominal, or 470 k½ with rear-panel
INST switch engaged
Maximum Input Level: > +30 dBu, or +22 dBu with rear-panel
INST switch engaged
OUTPUTS
Connectors: Male XLR Pin 2 hot and TRS 1/4Ó
Type: Servo-balanced/unbalanced, RF filtered
Impedance: Balanced 120½, unbalanced 60½
Maximum Output Level: +21.5 dBu, balanced or unbalanced
INSERT
Connectors: TRS 1/4Ó
Type: Impedance balanced/unbalanced (SEND),
electronically balanced/unbalanced
(RETURN)
Impedance: 100½ bal./50½ unbal. (SEND), 20k½
(RETURN)
Nominal Send Level: +4 dBu
Nominal Return Level: +4 dBu
EQUALIZER
LOW Frequency: 80 Hz, shelving filter
HIGH Frequency: 12 kHz, shelving filter
MID Frequency: Sweepable from 100 Hz to 8 kHz,
bandwidth 1.5 octaves (WIDE) or 0.5
octaves (NARROW)
Gain (all bands): Sweepable from -15 to +15 dB.
COMPRESSOR
Treshold range: -40dBu to +20dBu
Ratio: 1:1 to °:1
Threshold Characteristic: Selectable OverEasy¨ or hard knee curves
Attack/Release Characteristic: AutoDynamicª
Attack/Release Modes: Selectable Manual or Auto
Manual Attack Time: Scalable program-dependent. Typically
3dB/ms to .04dB/sec
Manual Release Time: Scalable program-dependent. Typically
250dB/sec to 5dB/sec
Auto Attack Time: Program-dependent. Typically 15ms for
10dB, 5ms for 20dB, and 3ms for 30dB
Auto Release Time: Program-dependent. Typically 125dB/sec
Output Gain: -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
SYSTEM PERFORMANCE
DRIVE Control Range: +10 dB to +60 dB
LEVEL Control Range: -15 dB to +15 dB
0.5 dB Bandwidth: 15 Hz to > 90 kHz +0/-0.5 dB
Frequency Response: <10 Hz to >200 kHz +0/-3.0 dB
EIN: Typically -126 dBu, 150½ source
impedance, unweighted, 20 Hz to 20 kHz
measurement bandwidth
THD + Noise: 0.04% typical at +0 dBu out, 1kHz, 33 dB
gain
3.5% typical at +21 dBu out, 1kHz, 35 dB
gain
Deviation From Linear Phase: < 20 degrees, 20 Hz to 20 kHz.
Interchannel Crosstalk: Typically -98 dB, 20 Hz to 20 kHz.
POWER SUPPLY
Operating Voltage: 100V, 120V, or 220-240VAC 50/60 Hz.
Power Consumption: 30 Watts maximum.
Fuse: 100V: 315mA 250V Slow Blow 5mm X
20mm
120V: 315mA 250V Slow Blow 5mm X
20mm
220-240V: T160 mA 250V 5mm X 20mm
Mains Connection: IEC 320 Receptacle
PHYSICAL
Dimensions: 3.5" H X 19" W X 8" D
Weight: 12 lbs (5.5 kg)
Shipping Weight: 13 lbs (5.9 kg)
Note: 0 dBu = 0.775V RMS.
VACUUM TUBE PREAMP / COMPRESSOR
576
SHAPEDITHER
576
Vacuum Tube
Preamp
Compressor
DRIVE
dB
-10
+15
+25
(LINE 0dB)
+60
+30
LOW
dB
-15
0
+15
PHASE LOW CUT+48V
MID
dB
-15
0
+15
FREQUENCY
dB
100
200
1k
8k
4k
NARROW
HIGH
dB
-15
0
+15
LINE
INSERT EQ
LEVEL
dB
-15
0
+15
PeakPlus
THRESHOLD
dB
0
+5
+10
Off
+20
+15
PAD
Off: None Off: None
Green: TPDF Green: Shape 1
Red: SNR
2
Red: Shape 2
TYPE IV
CONVERSION SYSTEM
INSERT
LEVEL
METER SOURCE
DRIVE
LEVEL OUTPUT LEVEL INSERT LEVEL
METER SOURCE
DRIVE
LEVEL OUTPUT LEVEL
LIMIT
PEAK
PREAMP
2010 75303+
-
¨
DECIBELS
-15
-20 -10
-25 -5
-30 0
DRIVE
dB
-15
0
+15
THRESHOLD
dB
-40
-30
-20 0
0
-
-10
+
+10
+20
CONTOUR BYPASSSC ENABLE
RATIO
1:1
1.2:1
1.5:1 2:1 3:1
6:1
∞:1
ATTACK
dB/mSec
3
1
.35
.04
.15
OverEasy
RELEASE
dB/Sec
250
125 12.5
50
5
UNLINK
AUTO
LEVEL
dB
-15
0
+15
PeakPlus
THRESHOLD
dB
0
+5
+10
Off
+20
+15
SC MON
LIMIT
PEAK
COMPRESSOR
2010 75303+
-
¨
DECIBELS
-15
-20 -10
-25 -5
-30 0
GAIN
REDUCTION
METER SOURCE
DRIVE
LEVEL OUTPUT LEVEL
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 [phone]
Fax [phone]
IntÕl Fax [phone]
[email protected]
http://www.dbxpro.com