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CONTRACTOR SERIES
VA SERIES AMPLIFIERS
MODELS VA2120 AND VA4120
VA
2120
2 CHANNEL POWER AMPLIFIER
POWER
1
2
PROTECT
CLIP
SIGNAL
POWER
VA
4120
4 CHANNEL POWER AMPLIFIER
POWER
1
2
3
4
PROTECT
CLIP
SIGNAL
POWER

INSTALLATION GUIDE

VA Series Installation Guide V1.0

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Table of Contents
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Summarization of Contents

Safety Warnings and Cautions
Shock Hazard Symbols
Explains symbols for electric shock risk and operational warnings.
Important Safety Instructions
General Safety Guidelines
Covers 14 essential safety precautions for installation and use.
Appliance Placement and Mains Connection
Details on avoiding moisture, ensuring plug accessibility, and earthing.
Additional Safety and Compliance Information
Installation and Operational Safety Notes
Notes on unit exposure, ventilation, temperature, and servicing.
Product Conformity and Electrical Safety
Lists European standards and CE marking, plus high voltage warnings.
Mains Fuse Replacement
Specifies fuse type and rating for mains over-current protection.
Product Introduction and Setup
Pre-connection Voltage Verification
Crucial step to check and set the mains voltage selector before powering on.
VA Series Amplifier Overview
Introduces models VA2120/VA4120, features, outputs, and cooling.
Rear Panel Connections and Controls
Input and Output Terminals
Describes line inputs, low-impedance outputs, and CV outputs.
Level Controls and High-Pass Filter
Explains channel level adjustments and the 65 Hz HPF function.
Power Input and Cooling Fans
Details the AC mains connection, fuse, and airflow requirements for fans.
Internal Configuration
Output Configuration Options
Explains how to configure channels for low-impedance or 25/70/100V-line systems.
Procedure for Low-Impedance Conversion
Step-by-step guide for changing output configuration.
Front Panel Indicators
Signal, Clip, and Protect LEDs
Explains the status indicators for each channel's signal, clipping, and protection.
Power Button and Air Intakes
Describes the power switch operation and the importance of front-panel air vents.
Technical Specifications
Input/Output and Performance Specs
Covers frequency response, impedance, output power, and THD+N.
General, Power, and Cooling Details
Includes protection, power input, fuse, operating temperature, and cooling system.
Physical Dimensions and Weight
Provides net and shipping dimensions and weights for both models.

Table of Contents