EasyManua.ls Logo

MTX Thunder TH90.4 User Manual

MTX Thunder TH90.4
8 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Page #1 background imageLoading...
Page #1 background image
TH90.4
4-Channel Class-AB Power Amplifier
Designed by MTX in the USA
www.mtx.com
Question and Answer IconNeed help?

Do you have a question about the MTX Thunder TH90.4 and is the answer not in the manual?

MTX Thunder TH90.4 Specifications

General IconGeneral
Channels4
RMS Power @ 4 Ohms90W x 4
RMS Power @ 2 Ohms135W x 4
Bridged RMS Power @ 4 Ohms270W x 2
Frequency Response20Hz - 20kHz
Damping Factor>200
Crossover Frequency40Hz - 400Hz
Fuse Rating30A x 2
CrossoverVariable
Crossover TypeVariable Low-Pass/High-Pass

Summary

Introduction

Specifications

Control Panel

Gain Control

Matches input sensitivity of amplifier to source unit. Operating range 100mV to 6V.

X-Over Switch

Selects active low pass (LP), high pass (HP), or turns off x-over.

High Pass X-Over Frequency Control

Selects desired high-pass frequency, adjustable from 40Hz to 400Hz.

Low Pass X-Over Frequency Control

Selects desired low-pass frequency, adjustable from 40Hz to 400Hz.

RCA Inputs

Used for source units with RCA or Line level outputs. Minimum 100mV output required.

Power LED

Indicates unit power status. Blinks when amplifier enters protect mode.

Speaker Level Inputs (HLI)

Allows operation from source units with speaker-level outputs. Requires remote turn-on wire.

Power Terminal (+BATT)

Main power input. Connect directly to the positive battery terminal. Use 4 AWG wire.

Remote Terminal (REM)

Turns amplifier on when supplied with 12 volts, usually from source unit.

Ground Terminal (GND)

Requires a proper ground connection to the vehicle chassis for peak performance.

Speaker Terminals

Connect speakers here. Observe polarity. Supports bridging for 4 ohm minimum.

Fuse (FUSE)

Protects the amplifier. Replace with same rating. Fuses are under the amp.

Installation & Mounting

Disconnect Battery

Crucial first step before installation. Disconnect the vehicle's negative battery cable.

Mounting Location

Determine mounting place considering airflow. Mark and drill holes safely.

Power Cable Installation

Route positive power cable through firewall using grommet. Connect to +BATT terminal.

Circuit Protection

Install circuit breaker/fuse near battery. Switch off or remove fuse until connections are made.

Grounding Connection

Connect ground wire to bare metal chassis point and amplifier GND terminal.

Remote Turn-on Wire

Connect source unit's remote-out to amplifier's REM terminal or power antenna lead.

Signal Cable Connection

Connect RCA cables or use high-level speaker terminals for signal input.

Speaker Wiring

Connect speakers to amplifier terminals using proper gauge wire. Bridged channels require 4 ohm minimum.

Final Checks

Double-check all wiring and connections. Reconnect battery and turn on circuit breaker.

Troubleshooting

No LED Indication

Addresses issues with no power or status LEDs. Check remote/power connections and ground.

Power LED On, No Output

Solutions for no sound with power. Check volume, speaker connections, and gain settings.

Output Distorted

Fixes for distorted audio. Adjust head unit volume and amplifier gain.

Balance Reversed

Corrects channel imbalance. Verify speaker wiring orientation and RCA input.

Bass is Weak

Troubleshoots weak bass. Ensure correct speaker phasing and consider MTX woofers.

Blowing Fuses

Addresses blown fuses. Lower output levels or check for amplifier defects.

Limited Warranty

Our Guarantee

Five-year limited warranty for Mitek Mobile products purchased in the USA after 1/1/2013.

Free Replacement Period

Products found defective within the first 2 years will be repaired or replaced.

Proration Period

After 2 years, defective products may be credited toward a new Mitek product purchase.

What Is Not Covered

Warranty excludes neglect, abuse, misuse, incorrect connection, or unauthorized alterations.

Obtain Warranty Service

Contact Mitek Warranty via website, email, or phone. Proof of purchase and RA number required.

Related product manuals