AXTON A480-250 - User Manual

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POWER AMPLIFIERS

Einbau- und Bedienungsanleitung

Installation & Operating Instructions

A1390

A2090

A2190

A490

A480-250

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Table of Contents

Questions and Answers

R
Ryan Key PhDAug 9, 2025
What to do if there is no music signal on loudspeakers from my AXTON A480-250 Amplifier?
- S
  Susan GillAug 9, 2025
  If there is no music signal from your AXTON Amplifier loudspeakers, several issues could be the cause. First, check the +12V, GND/0V, and "Remote" line connections. A blown fuse on the amplifier or the main fuse on the car battery side could also be the problem, so replace them if necessary. Additionally, a short-circuit on any of the speaker outputs or DC voltage at the speaker outputs might be the cause, so address these issues. Overload or overheating can also cause this, so reduce the load or allow the amplifier to cool down.
E
ericathorntonAug 15, 2025
Why is my AXTON Amplifier making a high-pitched buzzing sound?
- M
  Michael HerreraAug 15, 2025
  A high-pitched buzzing sound in your AXTON Amplifier could be due to a bad ground (GND) contact of the amplifier or head unit. Check the ground connections to ensure they are properly connected. It could also be caused by insufficiently shielded RCA interconnects or bad RCA cable routing, leading to inductive interference. In this case, improving the shielding and routing of your RCA cables might resolve the issue.
Z
Zachary ChambersAug 23, 2025
How to fix humming sound from AXTON Amplifier?
- J
  John GreenAug 23, 2025
  Humming from your AXTON Amplifier is often a sign of ground loop(s), which means there are multiple ground connections in your car audio installation. To resolve this, check the ground connections of all audio components to ensure there is only one ground connection point.
E
Edward PerryAug 31, 2025
What to do if my AXTON Amplifier is making a crackling sound?
- C
  Carlos RiveraAug 31, 2025
  A crackling sound in your AXTON Amplifier could be due to insufficient interference elimination of the ignition circuitry with engine speed. Improving the interference elimination might resolve this issue.

Summary

Introduction

General Features of AXTON Amplifiers

Details key features like PWM MOSFET power supply, A/B amplification, and adjustable filters.

A1390 Connections and Controls

A1390 Power Connections (GND, +12 V)

Details the GROUND/GND and +12V power input terminals.

A1390 Speaker Outputs

Specifies speaker output terminals and minimum impedance for the A1390.

A1390 Control Features

Covers remote, LPF, subsonic filters, and amplification mode controls.

A2090;A2190 Connections and Controls

A2090;A2190 Power and Remote Connections

Details the GROUND/GND, +12V power, and remote terminals.

A2090;A2190 Speaker Outputs and Protection

Specifies speaker outputs, minimum impedance, and protection LED.

A2090;A2190 Crossover and Mode Controls

A490 Connections and Controls

A490 Power, Remote, and Fuse Details

A490 Speaker Outputs and Indicators

A490 Crossover and Mode Selection

A480-250 Connections and Controls

A480-250 Power, Remote, and Fuse Details

A480-250 Speaker Outputs and Indicators

A480-250 Filter and Mode Controls

Installation and Wiring Guide

Amplifier Location and Mounting

Wiring Tips for Signal and Power Cables

Connecting Guide

Recommended Power Cable and Fuse Values

Connection Sequence and Safety Precautions

Controls and Adjustments

Adjustment Sequence and Filtering Modes

Crossover Frequency Configuration

Sensitivity and Gain Matching Procedure

Step-by-step guide to setting input sensitivity and matching gain levels.

Troubleshooting Guide

Troubleshooting: No Music or Protection Mode

Addresses issues with no sound on speakers or the protection LED being red/off.

Troubleshooting: Noise and Interference

Diagnoses and resolves buzzing, crackling, and humming sounds.

AXTON A480-250 Specifications

General

Brand	AXTON
Model	A480-250
Category	Amplifier
Language	English

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