Contents
Safety Information
2
Voltage Selection
2
Repairs
2
Fuses
2
Modifications
2
Contents
3
Overview
4
Features
6
Connections
7
Microphone Inputs (1-4)
7
Balanced Outputs – Overview
7
Driving Unbalanced Loads
8
Output Signal Levels
8
Direct Outputs (1-4)
8
Control Room Outputs (L&R)
8
Main Outputs (L&R)
8
AC Power Entry Connector
8
Fuse Holder
8
Preamp Section
9
Preamp Overview
9
Input Topology
9
Microphone Gain Controls
9
Blocking RF, EMI, and Noise
9
Phantom Power Switches
9
Input Protection
9
MirrorPan™ Pan Controls
11
20 dB Pads
11
Terminating Unused Inputs
11
40 Hz High-Pass Filters
11
LED Meters – Direct Outputs
11
Solo Bus
12
Solo Switches
12
Stereo/Mono Solo Switch
12
Control Room Outputs
13
Control Room Mute Switch
13
Driving Unbalanced Loads
13
Monitor Fader
13
HPA2™ Headphone Output
14
“0-Ohm” Output Impedance
14
Headphone Performance
14
Mix Outputs
15
Driving Unbalanced Loads
15
Main Fader
15
LED Meters – Mix Outputs
15
Rack Mounting
16
Mounting Near Other Equipment
16
Performance Graphs
17
Frequency Response
17
High-Pass Filter - Frequency Response 18
Inter-Channel Phase Response
19
THD+N vs. Frequency
20
Wideband THD+N vs. Frequency
21
Equivalent Input Noise vs. Gain
22
Noise Spectrum
23
THD Spectrum at 1 KHz
24
THD Spectrum at 10 KHz
25
Specifications
26
Microphone Preamps
26
Direct Outputs
27
Control Room and Main Outputs
27
MirrorPan™ Constant-Power Pan Circuit 28
HPA2™ Headphone Amplifier
28
LED Status Indicators and Meters
29
AC Power Requirements
29
Dimensions
30
Weight
30
Regulatory Compliance
31
FCC Notice
31
RoHS Compliant Information
31
CE Certificate of Conformity
32
Warranty Information
33
Benchmark Extended Warranty
34
Calibration
35
Required Equipment
35
+48V Adjustment
35
Microphone Gain and Metering
35
Monitor Gain Balance
35
Microphone Pan Balance
35
Main Gain Balance
36
Peak LED Adjust – Main Outputs
36
