Table of Contents

Page Sect. Title

Section 1. Introduction

Section 2. Brief Operating Instructions

2-1
2.1
PM4000 Front Panel Features
2-1
2.1.1 The Standard Monaural Input Module
2-7
2.1.2 The Stereo Input Module
2-12
2.1.3 The Master Module (1 - 8)
2-17
2.1.4 The Stereo Master Module
2-19
2.1.5 The TB (Talkback) Module
2-22
2.1.6 The Monitor Module
2-25
2.1.7 The Meter Bridge
2-27
2.2
PM4000 Rear Panel Features
2-34 2.4 The PW4000 Power Supply

Section 3. Specifications

3-1
PM4000 Mixing Console General Specifications
3-2
PW4000 Power Supply Specifications
3-3
PM4000 Input Characteristics
3-3
PM4000 Output Characteristics
3-4
Dimensional Drawings
3-7
Block Diagrams

Section 4. Installation Notes

4-1
4.1
Planning An Installation
4-1
4.2 Power Mains
4-1
4.2.1 Verify The Correct Mains Voltage
4-1
4.2.2 Ensure There is a Good Earth Ground
4-2
4.2.3 How To Obtain a Safety Ground When
Using a 2-wire Outlet
4-3
4.2.4 Improperly Wired AC Outlets: Lifted
Grounds
4-3
4.2.5 Improperly Wired AC Outlets: Lifted
Neutral
4-4
4.2.6 AC Safety Tips
4-4
4.2.7 Power Source Integrity
4-4
4.2.8 Turn-On Sequencing
4-5
4.3 Theory of Grounding
4-5
4.3.1 Why Is Proper Grounding Important?
4-6
4.3.2 Ground Loops
4-7
4.3.3 Basic Grounding Techniques
4-8
4.3.4 Balanced Lines and Ground Lift Switches
4-9
4.4 Audio Connectors and Cables
4-10
4.4.1 Types of Cable To Use
4-10
4.4.2 Cable Layout
4-10
4.4.3 Balanced versus Unbalanced Wiring
4-13
4.4.4 The Pro’s And Con’s of Input Transformers
4-14
4.4.5 Noise And Losses In Low and High
Impedance Lines
4-15 4.5 Direct Boxes

Page Sect. Title

4-15
4.5.1 Passive Guitar Direct Box
4-17
4.5.2 Active Guitar Direct Box
4-17 4.6 Configuring Equipment Racks

Section 5. Gain Structure and Levels

5-1
5.1 Standard Operating Levels
5-2
5.2 Dynamic Range and Headroom
5-2
5.2.1 What Is Dynamic Range?
5-2
5.2.2 The Relationship Between Sound Levels and
Signal Levels
5-2
5.2.3 A Discussion Of Headroom
5-2
5.2.4 What Happens When The Program Source
Has Wider Dynamics Than The Sound
Equipment?
5-4
5.2.5 A General Approach To Setting Levels In a
Sound System
5-4
5.2.6 How To Select a Headroom Value and
Adjust Levels Accordingly
5-6
5.3 Gain Overlap And Headroom

Section 6. Optional Functions

6-2
6.1 Removing and Installing A Module
6-3
6.2 Mono Input Direct Out Jack:
Pre-Fader or Post-Fader (switch)
Pre-ON or Post-ON Switch (jumper)
6-4
6.3 Mono Input Aux Sends: Pre Fader & EQ or
Pre Fader/post EQ
6-5 6.4 Mono Input Cue/Solo Switch: Pre-Fader or
Follow MT PRE Switch
6-6
6.5
Stereo Input Cue/Solo Switch: Pre-Fader or
Follow MT PRE Switch
6-7
6.6
Mono & Stereo Input Channel MT PRE
Switch: Pre- or Post-ON Switch
6-8
6.7
Stereo Input Channel Insert In/Out Jacks:
Pre-EQ or Post-EQ
6-9
6.8 Stereo Input Channel Aux Sends:
Pre Fader & EQ or Pre Fader/Post EQ
6-10 6.9 Stereo Input Channel Aux Sends 1-8:
L+R Blend or Stereo Pairs
6-11 Stereo Input Channel Stereo
6.10
Aux Sends 1 & 2: L+R Blend or Stereo Pairs
6-12 6.11 Stereo Input Channel Feed to Monitor
Module ST IN 3 or ST IN 4
6-13 6.12 Phase Switch Function: Change Polarity of
Both L and R inputs, or of L Only
6-14 6.13 Stereo Input Module: Output Enable
Jumpers to Group, Stereo and Aux Busses
6-15 6.14 Master Module: Group-to-Matrix Assigned
Pre or Post Group Master Fader
Page TC-1