JBL VMA1240 User Manual

VMA160
VMA1120
VMA1240
VMA260
VMA2120
Commercial Series
1 Channel & 2 Channel Mixer-Amplifier
Operation Manual
1
VMA 160
1 2 3 4 MUSIC
USB
MASTER
1
USB
4
VMA 260
1 2 3 MUSIC 1 4 5 6 MUSIC 2
MASTER 2MASTER 1
VMA Series

JBL VMA1240 Specifications

General

Channels	4
Frequency Response	20 Hz - 20 kHz
Input Impedance	20 kOhms
Input Sensitivity	1V
Signal-to-Noise Ratio	> 100 dB
Damping Factor	>200 (8 ohms, 20Hz-20kHz)

Summary

Important Safety Information

Electrical Safety Instructions

Guidance on mains lead wiring, grounding, and plug safety.

General Product Operation Warnings

Key warnings for safe operation including exposure, ventilation, and maintenance.

Electromagnetic Compatibility

EC Declaration of Conformity

Front Panel Controls and Indicators

Rear Panel Controls and Connectors (VMA160-1240)

Rear Panel Controls and Connectors (VMA260-2120)

Amplifier Setup Procedures

Installation Guidelines

Rack Mounting Procedure

Cooling and Ventilation Requirements

Output Wiring and Speaker Connections

Complete Audio System Wiring

Connecting to AC Power

Initial Startup Procedure

Operation Precautions

Input Routing Configuration

Output Configuration Settings

70V/100V Output Selection

Enabling high impedance output modes and associated high-pass filter.

Voice Activated Ducking (VOX)

Priority Muting Functionality

Remote Volume Control Setup

Media Player Operations

Firmware Upgrade Procedure

Troubleshooting Common Issues

Performance Specifications