AMS NEVE 8051 User Manual
8051 5.1 Compressor User Guide
AMS
NEVE
8051
5.1 Compressor
User Guide
527-357
Issue 2
© 2005 AMS Neve Ltd own the copyright of all
information and drawings contained in this manual which
are not to be copied or reproduced by any means or
disclosed in part or whole to any third party without
written permission.
As part of our policy of continual product improvement,
we reserve the right to alter specifications without notice
but with due regard to all current legislation.
Disclaimer: The information in this manual has been
carefully checked and is believed to be accurate at the
time of publication. However, no responsibility is taken by
us for inaccuracies, errors or omissions nor any liability
assumed for any loss or damage resulting either directly or
indirectly from use of the information contained within it.
Issue 2
AMS NEVE LTD • BILLINGTON ROAD • BURNLEY
TELEPHONE: +44 (0) 1282 457011 • FAX: +44 (0)1282 417282
TELEPHONE: +44 (0) 20 7916 2828 • FAX: +44 (0)20 79162827
HEAD OFFICE
LANCS BB11 5UB • ENGLAND
LONDON OFFICE
NORTH AMERICAN OFFICES
AMS NEVE INC., NEW YORK
TEL: +1 (212) 965 1400 • FAX: +1 (212)965 9306
AMS NEVE INC., HOLLYWOOD
TEL: +1 (818) 753 8789 • FAX: +1 (818)623 4839
e-mail: info@ams-neve.com
http://www.ams-neve.com
8051 5.1 Compressor User Guide
Contents
Introduction 1
Dimensions 2
Rack Mounting and Cooling 2
Power Requirements 2
Mains Supply 2
Rear Panel Connectors 3
Compressor Controls 4
LFE Filter (Filter to Channel) 4
Bypass 5
Sidechain Link 6
Sidechain Filter 6
Control Link 7
SC Trims and Threshold 8
EXT Control 9
Threshold 10
Gain Makeup 10
Ratio 10
Attack 11
Recovery 11
Gain Reduction Meters 11
Key Input 12
Key Filter 12
Bias Control 12
Output Level 12
Power 12
Mastering Compressor Controls (AM5292) 13
8051 Compressor - 88R(S) Console mounted 14
I/O Wiring (AM5052 & AM5265) 15
Specifications 16
8051 Block Diagram 17
Issue 2 Page ii
8051 5.1 Compressor User Guide
Introduction
The 8051 is an analogue compressor that provides six transformer balanced audio paths
complemented by two sidechains and a key input. Input and output to the sidechains is assignable
to and from the six channels. Assignable LFE filters on the input and sidechains along with the key
input provide integrated bass management.
Flexible sidechain routing, trimming and filtering make this a powerful and responsive tool for
surround mixing.
The 8051 uses the same feedback topology as the 33609 compressor and includes the same
transformers, diode-bridge gain control and discrete power amplifiers in the audio path.
8051 5.1 Compressor
Issue 2 Page 1
8051 5.1 Compressor User Guide
Dimensions
Units U Depth
8051 Compressor
(AM4851 and AM5292)
not including mains plug
3 500 (20) 135 (5.25) 10.5 (23)
Rack Mounting and Cooling
The rack units should be installed in a 19" cabinet with access to the front and rear.
No specific air conditioning is required for the racks, provided that there is a free flow of air through
the rack from front to back, and that the ambient air is maintained below 30 degrees centigrade.
Therefore the racks may be stacked.
Power Requirements
8051 Units
Rated Voltage 100-250V AC
Rated Frequency 47-63 Hz
Rated Current .25A at 250V
mm (inches)
Height
mm (inches)
Approx. Weight
kg (lbs)
Mains Supply
The power supply unit is a universal input type therefore no mains operating voltage setting is
required.
The CH (chassis) and 0V are linked externally.
See the rear panel layout for AM4851 & AM5292.
Primary Protection Fuse:
Operating Voltage 250/110V
Fuse Rating and Type T1.6A/T1.6A A/S Ceramic
Location Rear Panel IEC Mains Connector
Issue 2 Page 2
8051 5.1 Compressor User Guide
Rear Panel Connectors
Mating connectors are not supplied with these units.
-
CONTROL
VOLTAGE I/O
WARNING
DISCONNECT MAINSLEAD
TO ISOLATEUNIT.
NO USERSERVICEABLE
PARTSINSIDE
HAZARDOUS VOLTAGES INSIDE
REFER TOMANUALS
CHASSIS INTERNAL
0V
PLEASE SEE
MANUAL
FUSE 1.6AA/S CERAMIC
INPUT VOLTAGE 100-250V AC
INPUT FREQUENCY47-63Hz
INPUT 2INPUT 3INPUT 4INPUT 5INPUT 6KEY INPUT
INPUT 1
OUTPUT 1OUTPUT 2OUTPUT 3OUTPUT 4OUTPUT 5OUTPUT 6
PUSHPUSHPUSHPUSHPUSHPUSHPUSH
CONTROL VOLTAGE I/O - 15 Pin D-Type
KEY INPUT - XLR Socket
INPUT 1-6 - XLR Socket
OUTPUT 1-6 - XLR Plug
-
These connectors apply to both the Standard and Mastering Compressor (AM4851 &
AM5292).
-
For I/O wiring on 88R(S) console mounted compressors (AM5052 &AM5265) see page 15 .
Issue 2 Page 3
8051 5.1 Compressor User Guide
0-5.5
0
8
dB
4
0
12
16
20
8
dB
4
0
12
16
20
A
B
-10
-10
+20
+20
2ms
2ms
4ms
4ms
6ms
6ms
8ms
8ms
16ms
16ms
-20
-20
-20
+16
+16
+16
1.5:1
1.5:1
2:1
2:1
8
8
8
8
8
8
8
8
8
8
12
12
12
12
12
12
12
12
16
16
16
16
16
4
4
4
4
4
4
4
4
4
4
0
0
0
0
0
3:1
3:1
4:1
4:1
6:1
6:1
max
max
.1s
.1s
.2s
.2s
.4s
.4s
.8s
.8s
1.5s
1.5s
3s
3s
DISCRETE
0-5.5
0
8
dB
4
0
12
16
20
8
dB
4
0
12
16
20
A
B
-10
-10
+20
+20
2ms
2ms
4ms
4ms
6ms
6ms
8ms
8ms
16ms
16ms
-20
-20
-20
+16
+16
+16
1.5:1
1.5:1
2:1
2:1
8
8
8
8
8
8
8
8
8
8
12
12
12
12
12
12
12
12
16
16
16
16
16
4
4
4
4
4
4
4
4
4
4
0
0
0
0
0
3:1
3:1
4:1
4:1
6:1
6:1
max
max
.1s
.1s
.2s
.2s
.4s
.4s
.8s
.8s
1.5s
1.5s
3s
3s
DISCRETE
0-5.5
0
8
dB
4
0
12
16
20
8
dB
4
0
12
16
20
A
B
-10
-10
+20
+20
2ms
2ms
4ms
4ms
6ms
6ms
8ms
8ms
16ms
16ms
-20
-20
-20
+16
+16
+16
1.5:1
1.5:1
2:1
2:1
8
8
8
8
8
8
8
8
8
8
12
12
12
12
12
12
12
12
16
16
16
16
16
4
4
4
4
4
4
4
4
4
4
0
0
0
0
0
3:1
3:1
4:1
4:1
6:1
6:1
max
max
.1s
.1s
.2s
.2s
.4s
.4s
.8s
.8s
1.5s
1.5s
3s
3s
DISCRETE
0-5.5
0
8
dB
4
0
12
16
20
8
dB
4
0
12
16
20
A
B
-10
-10
+20
+20
2ms
2ms
4ms
4ms
6ms
6ms
8ms
8ms
16ms
16ms
-20
-20
-20
+16
+16
+16
1.5:1
1.5:1
2:1
2:1
8
8
8
8
8
8
8
8
8
8
12
12
12
12
12
12
12
12
16
16
16
16
16
4
4
4
4
4
4
4
4
4
4
0
0
0
0
0
3:1
3:1
4:1
4:1
6:1
6:1
max
max
.1s
.1s
.2s
.2s
.4s
.4s
.8s
.8s
1.5s
1.5s
3s
3s
DISCRETE
0-5.5
0
8
dB
4
0
12
16
20
8
dB
4
0
12
16
20
A
B
-10
-10
+20
+20
2ms
2ms
4ms
4ms
6ms
6ms
8ms
8ms
16ms
16ms
-20
-20
-20
+16
+16
+16
1.5:1
1.5:1
2:1
2:1
8
8
8
8
8
8
8
8
8
8
12
12
12
12
12
12
12
12
16
16
16
16
16
4
4
4
4
4
4
4
4
4
4
0
0
0
0
0
3:1
3:1
4:1
4:1
6:1
6:1
max
max
.1s
.1s
.2s
.2s
.4s
.4s
.8s
.8s
1.5s
1.5s
3s
3s
DISCRETE
0-5.5
0
8
dB
4
0
12
16
20
8
dB
4
0
12
16
20
A
B
-10
-10
+20
+20
2ms
2ms
4ms
4ms
6ms
6ms
8ms
8ms
16ms
16ms
-20
-20
-20
+16
+16
+16
1.5:1
1.5:1
2:1
2:1
8
8
8
8
8
8
8
8
8
8
12
12
12
12
12
12
12
12
16
16
16
16
16
4
4
4
4
4
4
4
4
4
4
0
0
0
0
0
3:1
3:1
4:1
4:1
6:1
6:1
max
max
.1s
.1s
.2s
.2s
.4s
.4s
.8s
.8s
1.5s
1.5s
3s
3s
DISCRETE
Neve
+16
8
8
12
4
4
0
DISCRETE
8
dB
4
0
12
16
20
4ms
6ms
8ms
16ms
-20
+16
8
8
12
12
16
4
4
0
..2s
.4s
.8s
1.5s
0
8
dB
4
0
12
16
20
8
dB
4
0
12
16
20
4ms
4ms
6ms
6ms
8ms
8ms
16ms
16ms
-20
+16
8
8
12
12
16
4
4
0
max
.1s
.2s
..2s
.4s
.4s
.8s
.8s
1.5s
1.5s
3s
DISCRETE
8
dB
4
0
12
16
20
16ms
-20
+16
8
8
12
12
16
4
4
0
.4s
.8s
1..5s
3s
0
8
dB
4
0
12
16
20
8
dB
4
0
12
16
20
16ms
16ms
-20
+16
8
8
12
12
16
4
4
0
.4s
.4s
.8s
.8s
1.5s
1..5s
3s
3s
DISCRETE
8
dB
4
0
12
16
20
2ms
4ms
6ms
8ms
16ms
-20
+16
8
8
12
12
16
4
4
0
3:1
4:1
6::1
max
.1s
.2s
.4s
.8s
1.5s
3s
0
8
dB
4
0
12
16
20
8
dB
4
0
12
16
20
2ms
2ms
4ms
4ms
6ms
6ms
8ms
8ms
16ms
16ms
-20
+16
8
8
12
12
16
4
4
0
3:1
3:1
4:1
4:1
6:1
6::1
max
max
.1s
.1s
.2s
.2s
.4s
.4s
.8s
.8s
1.5s
1.5s
3s
3s
DISCRETE
8
dB
4
0
12
16
20
+20
2ms
4ms
6ms
8ms
16ms
-20
+16
2:1
8
8
8
112
12
12
16
16
4
4
4
0
0
3:1
4:1
6:1
.2s
.4s
.8s
1.5s
0
8
dB
4
0
12
16
20
8
dB
4
0
12
16
20
+20
+20
2ms
2ms
4ms
4ms
6ms
6ms
8ms
8ms
16ms
16ms
-20
+16
1.5:1
2:1
2:1
8
8
8
8
8
12
112
12
12
12
16
16
16
4
4
4
4
0
0
0
3:1
3:1
4:1
4:1
6:1
6:1
max
.1s
.2s
.2s
.4s
.4s
.8s
.8s
1.5s
1.5s
3s
DISCRETE
8
dB
4
0
12
16
20
-10
+20
2ms
4ms
6ms
8ms
16ms
-20
+116
+16
1.5:1
2:1
8
8
8
8
8
8
12
12
12
12
16
16
4
4
4
4
4
4
0
0
0
3:1
4:1
6:1
max
.1s
.2s
.4s
.8s
1.5s
3s
0
8
dB
4
0
12
16
20
8
dB
4
0
12
16
20
-10
-10
+20
+20
2ms
2ms
4ms
4ms
6ms
6ms
8ms
8ms
16ms
16ms
-20
+16
+116
+16
1.5:1
1.5:1
2:1
2:1
8
8
8
8
8
8
8
8
8
8
12
12
12
12
12
12
16
16
16
4
4
4
4
4
4
4
4
4
4
0
0
0
0
0
3:1
3:1
4:1
4:1
6:1
6:1
max
max
.1s
.1s
.2s
.2s
.4s
.4s
.8s
.8s
1.5s
1.5s
3s
3s
DISCRETE
+116
8
8
12
4
4
0
Neve
Compressor Controls
100
120
Hz
Hz
15
15
0
1/2
0
3
SC TRIMS dB
100
IN/OUT
0
15
15
15
5/6
0
15
15
15
4
IN/OUT
1208080
EXT
A
CTRL
EXT
B
CTRL
FILTER TO CHANNEL
5
3
1
2
4
BYPASS
1
2
MST
M
SIDECHAIN LINK
123456
A
A
123456
B
B
SIDECHAIN FILTER
1
2
123456
A
A
123456
B
B
3
A
B
3
CONTROL LINK
A
B
5
4
A
B
5
4
A
B
6
6
A
A
B
B
6
A
A
B
B
LFE Filter (Filter to Channel)
A 12dB/octave low-pass filter can be assigned to
any one channel. This filter is applied directly to the
input before the relay-bypass point, and its -3dB
frequency is selectable from 80, 100 or 120Hz.
A
4
8
12
16
-20
THRESHOLD dBu
B
4
8
12
16
-20
THRESHOLD dBu
RATIO
RATIO
6ms
4ms
8ms
2ms
4:1
6:1
2ms
4:1
6:1
16ms
.4s
.2s
ATTAC K
.1s
max
RECOVERY
6ms
4ms
8ms
16ms
.4s
.2s
ATTAC K
.1s
max
GAIN REDUCTION
.8s
1.5s
dB
3s
8
12
4
0
GAIN REDUCTION
8
12
4
0
.8s
1.5s
dB
3s
KEY I/P
SIDE
CHAIN
16
SEL
20
IN/OUT
A
B
16
20
POWER
RECOVERY
100
120
80
Hz
15
15
80
Hz
0
1/2
0
3
SC TRIMS dB
100
IN/OUT
1
0
1
MST
15
15
15
15
120
M
15
5/6
0
123456
123456
15
4
IN/OUT
1
EXT
123456
A
CTRL
EXT
123456
B
CTRL
A
B
100Hz
A/B
0
BIAS
2
2
A
B
2
A
B
4
0
8
12
16
-20
THRESHOLD dBu
8051
DISCRETE
MULTI-CHANNEL
COMPRESSOR
OUTPUT LEVEL dB
FILTER TO CHANNEL
3
4
BYPASS
3
4
SIDECHAIN LINK
A
A
B
B
SIDECHAIN FILTER
3
4
CONTROL LINK
A
A
B
B
4
8
12
+16
0-5.5
5
6
5
6
A
A
A
B
B
B
5
6
A
A
A
B
B
B
4
8
0
12
4
8
0
-10
4
+16
4
8
0
-10
4
+16
8
12
8
12
0
MAKE-UP
GAIN dB
4
MAKE-UP
GAIN dB
16
3:1
+20
2:1
1.5:1
8
12
16
3:1
+20
2:1
1.5:1
Issue 2 Page 4
Loading...