Audiovox BTR120 User manual

Model AXT-120

120 Watt 2-Channel

Amplifier

OWNER'S

MANUAL

Specifications...........................................................................1

Precautions.............................................................................. 2

Installation Instructions............................................................ 3

Wiring Instructions.............................................................. 4 - 5

Input Wiring Diagram............................................................... 6

Output Wiring Diagram............................................................ 7

Operation................................................................................. 8

Warranty.................................................................................. 9

INDEX

Input Sensitivity: Low-level 200 mV. - 2 V.

High-level 2V - 10 V.

Supply Voltage: 12 volts, negative ground

Fuse Rating: 5 amps.

Dimensions (W X H X D): 8-5/8" X 2-1/8" X 3-15/16”

219 mm X 54.3 mm X 100 mm

Maximum Output Power: 120 Watts

30 watts RMS @ 4 Ohms

Output Impedance: 4-8 Ohms

Frequency Response: 20- 25,000Hz +/-1 dB

Channel Separation: 60 dB

Signal / Noise Ratio: 90 dB

Input Impedance: Low-level 10K Ohms

high-level 100 Ohms

* Due to continuing improvement, Audiovox reserves the right to change features and design without notice.

-1-

This power amplifier has been designed to provide high Quality performance with a

minimum of maintenance. However, it's performance will only be as good as the care

and quality of components with which it is installed. We therefore advise that you

read these instructions very carefully to familiarize yourself with the product and it's

features.

Should you require assistance with the installation or wiring so this unit, please call

our toll-free "HELP" line at 1-800-645-4994 during the days/hours shown.

HELP!

1-800-645-4994

Monday-Friday 8:30am - 7:00pm Eastern

Saturday 9:00am - 5:00pm Eastern

SPECIFICATIONS

HIGH PERFORMANCE STEREO AMPLIFIER

1. Although this unit is designed with built-in self-protection circuits, there may be a possibility of damage if it is not wired

correctly. Please follow the wiring instructions carefully for the type of system being used.

2. The last lead to be connected is the wire to the positive( ) terminal of the battery. Connect this wire only after having

completed and checked all other connections to the amplifier.

3. By nature of its design, a power amplifier generates heat and requires good air circulation around it to dissipate that

heat. Do not install the amplifier in an enclosed area which does not permit adequate air circulation. Should the

temperature of the unit rise too high, the internal thermal sensors will shut off operation until it has cooled down

sufficiently.

4. If fuse replacement is necessary, use only fuses of the same ampere rating as originally supplied with the unit. The

use of fuses with incorrect ratings may cause serious damage to the amplifier. If fuses blow consistently, carefully

check all electrical connections to the unit.

5. Supply of adequate battery voltage is critical to the proper operation of the power amplifier. The leads to the battery

and chassis ground must be of a thick enough gauge to provide this voltage to the amplifier. We recommend #16 gauge

wire or thicker (smaller gauge #) for the battery and ground leads.

6. Make certain that the speakers to be used with this amplifier are capable of handing the output power (wattage) of

the unit. Use of speakers not rated for the output of this amplifier may cause damage to or failure of the speakers

for which Audiovox will not be liable.

-2-

PRECAUTIONS

-3-

1. Select a mounting area where the amplifier will

have sufficient air circulation for proper cooling.

Inadequate air circulation will cause the temperature

of the amplifier to rise and will trigger the thermal

protection mode.

2. Place the amplifier on the mounting surface and

mark the locations of the four mounting holes as

shown in the illustration.

3. Remove the amplifier and drill a 1/8" hole at

each of the four locations.

CAUTION: Before drilling the holes, look at the

underside of the mounting surface. Always check

carefully to avoid drilling into wiring, braces, fuel

or brake lines.

CHECK BEFORE YOU DRILL!

4. Secure the amplifier to the mounting surface using

The self-tapping screws provided.

INSTALLATION INSTRUCTIONS

MOUNTING SURFACE

DRILL 1/8" HOLE

SCREW

INSTALLATION DIAGRAM

The wiring of your amplifier will depend on the system and speakers you are using but will either be a 4-Channel,

3-channel, 2-channel, or mixed-mono application. The following pages illustrate the input and output wiring for these

types. Please refer to the appropriate diagrams for the system configuration you are using.

The power and speaker wire connections for this amplifier are made via screw tightened terminal blocks. Loosen

the screw for the connection to be made and fully insert the wire (strip 1/2" of insulation from the end) under the

respective screw on the side panel (crimp-on "U" terminals are provided to simplify wiring and we recommend their

use.). Tighten the screw down to secure the wire.

1. Power Connection

The battery terminal (BATT) must be connected directly to the positive terminal of the vehicle battery to provide an

adequate voltage source and minimize noise. Connecting the battery terminal lead to any other point (such as the fuse

block) will reduce the power output and may cause noise and distortion. Use only #16 gauge or thicker (smaller gauge

#) wire for this lead and connect it to the terminal of the battery after all other wiring is completed.

2. Ground Connection

The ground terminal (GND) connection is also critical to the correct operation of the amplifier. Use a wire of the same

gauge as the power connection (#16 or thicker) and connect it between the ground terminal (GND) of the amplifier and

a metal part of the vehicle close to the mounting location. This wire should be as short as possible and any paint or rust

at the grounding point should be scraped away to provide a clean metal surface to which the end of the ground wire can

be screwed or bolted.

3. Remote Turn-On Connection

The amplifier is turned on by applying +12 volts to the remote turn-on terminal (REM). The wire lead to this terminal

should be connected to the "Auto-Antenna" lead from the car stereo which will provide the +12 volts only when the car

stereo is turned on. If the car stereo does not provide an Auto-Antenna lead, the remote turn-on lead may be wired to

an "Accessory" or "Radio" terminal in the car's fuse block. This will turn the amplifier on and off with the ignition key,

regardless of whether the car stereo is on or off. The remote turn-on lead does not carry large currents, so #20 gauge

wire may be used for this application.

#16

-4-

WIRING INSTRUCTIONS

4. Speaker Connections

Depending on the type and number of speakers used with the amplifier, wire them to the speaker terminals as per the

appropriate wiring diagram. For most applications, #18 gauge wire should be used for the speaker leads but in no case

thinner than #20 gauge. For leads in excess of 10 feet, #16 gauge is recommended. When wiring the speakers, pay

careful attention to the polarity of the terminals on the speakers and make certain they correspond to the polarity of the

corresponding terminals on the amplifier. DO NOT ground any speaker leads to the chassis of the vehicle.

5. Input Connections

This amplifier features both high and low-level input capability. Use either the low-level or high-level inputs, not both.

If low-level outputs are provided from the car stereo, it is recommended that the low-level inputs be used for lowest

distortion and best performance. Use good quality shielded audio cables with RCA plugs at both ends to connect

the stereo to the amplifier and keep the cable lengths to a minimum to avoid noise.

If the car stereo does not provide low-level outputs, the amplifier may be connected via the speaker (high-level)

outputs from the stereo. Wire the speaker leads from the car stereo to the 5-pin adaptor harnesses as shown in the

diagram (shielded cable is not required for this application) and plug the connectors into the mating High-Level Input

socket on the amplifier. Carefully splice and insulate all wire connections.

CAUTION: Use either the low-level or the high-level inputs on the amplifier.

DO NOT use both input levels at the same time.

-5-

WIRING INSTRUCTIONS

-6-

INPUT WIRING DIAGRAM

IMPORTANT

USE EITHER HIGH-LEVEL OR

LOW-LEVEL INPUT, NOT BOTH.

CAR STEREO

HIGH-LEVEL (SPEAKER) INPUT

(WIRE SIDE VIEW) LOW-LEVEL INPUT

RCA TYPE SHIELDED

EXTENSION CABLES

(NOT INCLUDED)

Gray

Brown

Black

Green

White

HI-INPUTHI-INPUT

GNDGND

L +L + R +R +

LLRR

MINMIN MAXMAX

GAINGAIN

PWRPWR

Left

Right

-7-

LEFT SPEAKER

CAR STEREO

GROUND

FUSEFUSE

REMBATT GND

LEFTRIGHT

BATTERY

FOR 12 VOLT USE ONLY AUTO-ANTENNA LEAD

USE # 16 GAUGE WIRE

RIGHT SPEAKER

GROUND METAL

SECTION OF VEHICLE

EXISTING SCREW OR BOLT CLEAN PAINT, RUST, DIRT

OR GREASE FROM AREA FOR GOOD CONNECTION.

OUTPUT WIRING DIAGRAM

WARNING!

NEVER COMBINE (BRIDGE ) OUTPUTS FOR USE WITH 2 SPEAKER.

NEVER GROUND NEGATIVE SPEAKER LEADS TO CHASSIS GROUND.

FAILURE TO WIRE CORRECTLY MAY CAUSE DAMAGE TO THE AMPLIFIER.

-8-

Power Indicator Lamps

The Power Indicator Lamps will light to indicate that the

unit is connected to the battery and that the Remote

Turn-On terminal is receiving +12 volts, thus turning

on the amplifier.

After initial set-up, the amplifier should not require any

further adjustment unless there is a change in the car

stereo or speaker system with which it is used.

Level (Gain) Controls

The amplifier is capable of operating from sources

supplying a wide range of input levels. The Level controls

should initially be set to the mid-rotation position.

If it is found that there is not enough output even when

the volume control on the car stereo is at its maximum

setting, adjust the Level control to increase the output

from the system.If, however, there is still output from

the amplifier when the car stereo volume control is at

its minimum setting, orthe output level increases too

fast with a small rotation ofthe volume control, adjust

the Level control to decrease the output from the

system. Once the correct setting is found, these

controls should not require any further adjustment.

Fuses

The circuitry of the amplifier is protected from damage by

an automotive-type fast-blow fuse. If fuse replacement

is necessary, use only fuses of the of the same ampere

rating as originally supplied with the unit. The use of fuses

with incorrect ratings may cause serious damage to the

amplifier. If fuses blow consistently, carefully check all

electrical connections to the unit.

OPERATION

HI-INPUTHI-INPUT

GNDGND

L +L + R +R+

MINMIN MAXMAX

GAINGAIN

PWRPWR

FUSEFUSE

REMBATT GND

LEFTRIGHT

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