Audiovox Phase Linear UPA224 User Manual (English)

Questions and Answers:

S
Sherry Bailey DDSJul 30, 2025
What to do if my Audiovox Phase Linear UPA224 does not turn on?
- J
  James ThompsonJul 30, 2025
  If your Audiovox Amplifier isn't turning on, there are several potential causes. First, check the fuse(s) because there might be no power to the +12V terminal. Also, check the head unit fuse(s) and wiring, as there might be no power to the REM terminal. Replace the fuse and identify the cause of failure if the main fuse at the battery or the fuse at the amplifier is blown. Lastly, reground the main power ground to a bare metal chassis in case of a faulty ground.
C
Cindy GonzalezAug 6, 2025
Why is there engine noise or alternator whine in my Audiovox Phase Linear UPA224?
- B
  Bryan LambAug 6, 2025
  Engine noise or alternator whine in your Audiovox Amplifier can stem from several issues. It could be due to ground loop(s), so using good quality shielded RCA cables is advisable. A faulty ground at the amp or head unit can also cause this, so reground both to a clean, bare metal chassis. Inductive coupling might be the problem, requiring you to reroute RCA and/or speaker wires away from factory harnesses. Lastly, readjust the input level, as the input level on the amp might be set too high.
R
Richard Weaver DDSAug 15, 2025
What to do if my Audiovox Phase Linear UPA224 Amplifier blows fuse(s)?
- R
  rickeymullinsAug 15, 2025
  If your Audiovox Amplifier is blowing fuse(s), it could be due to power wires connected backwards; reconnect them properly. Alternatively, there might be an internal problem with the amp, in which case you should take the unit for service.
D
dcunninghamAug 21, 2025
Why is the volume control too sensitive on my Audiovox Amplifier?
- C
  Corey JacksonAug 21, 2025
  If the volume control on your Audiovox Amplifier is too sensitive, it's likely that the input level control is adjusted too high. Readjust the input level to decrease the sensitivity.

Audiovox Phase Linear UPA224 Specifications

General

Brand	Audiovox
Model	Phase Linear UPA224
Category	Amplifier
Language	English

Summary

INTRODUCTION

Amplifier System Compatibility Warning

Warns about connecting the amplifier to incorrect electrical systems.

Installation Assistance Information

Provides contact details for installation support.

Warranty Service Requirements

Explains requirements for warranty service, including proof of purchase.

Hearing Safety Advisory

Advises responsible listening at moderate volumes to prevent hearing damage.

INSTALLATION

Installation Supplies and Tools Needed

Lists necessary tools and supplies for amplifier installation.

Critical Safety: Battery Disconnection

Instructs to disconnect the battery negative cable before starting installation.

Amplifier Location and Mounting Guidelines

Guides on selecting a suitable location and securely mounting the amplifier.

Wire Routing Best Practices

Emphasizes the importance of correct wiring for proper operation and avoiding damage.

POWER WIRING

Power Indicator and Fuse Type

Describes the power indicator light and specifies fuse replacement types.

Main Power (+12V) Connection

Details connecting the main power wire to the battery, including fuse placement.

Remote (REM) Turn-On Connection

Explains connecting the remote turn-on lead from the receiver to the amplifier.

Ground (GND) Connection Procedure

Guides on making a secure ground connection to the vehicle chassis.

SPEAKER WIRING

Speaker Wire Gauge Requirements

Stresses using the correct gauge speaker wire for connections.

Speaker Polarity and Wiring Diagrams

Emphasizes observing proper speaker polarity and refers to wiring diagrams.

INPUT WIRING & CONTROLS

Low Level (RCA) Input Connection

Explains connecting RCA cables from the receiver to the amplifier's low-level input.

Input Level Adjustment Procedure

Details how to adjust the input level control to match the receiver's output.

High Level Input Usage

Describes using the high-level input when RCA outputs are unavailable.

High Level Input Wiring Color Codes

Provides wiring color codes for the high-level input harness wires.

Exclusive Input Connection Warning

Warns against connecting both RCA and high-level inputs simultaneously.

TESTING AND TROUBLESHOOTING

Reconnecting the Battery

Instructs to reconnect the battery negative terminal after wiring is complete.

Testing Amplifier Power Wiring

Guides on testing power wiring to ensure the amplifier turns on.

Testing Speaker Connections

Guides on testing speaker connections to verify they are properly connected.

Common Amplifier Problems and Solutions

Provides a table of common issues, their causes, and corrective actions.

SPECIFICATIONS

CEA Compliant Power Ratings

Lists power output, signal-to-noise ratio, and dynamic power based on CEA standards.

UPA224 Model Specifications

Details specific technical specifications for the UPA224 model, including dimensions.

UPA424 Model Specifications

Details specific technical specifications for the UPA424 model, including dimensions.

General Amplifier Performance Specs

Lists channel separation, input sensitivity, and power supply details.

90 DAY LIMITED WARRANTY

Warranty Terms and Limitations of Liability

Outlines the warranty terms, limitations on liability, and exclusions.

Legal Disclaimers and State Law Rights

Clarifies warranty replacement, legal disclaimers, and consumer rights by state.

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