MTX Thunder TA4252 User Manual

TA4252 Owner’s Manual
Introduction
Thank you for choosing MTX to help reach the ultimate goal with your vehicle. Adding MTX amplifiers and
matching MTX speakers and subwoofers with StreetWires connections will put you in a better position to
hear, feel, and experience all of the music the artist intended.
Specifications
Primary Ratings:
Power Output: 63 watts RMS x 2-channels at 4 ohm and ≤ 1% THD+N
Signal-to-Noise Ratio (1 watt): 77dB
Secondary Ratings
Power Output: 125 watts RMS x 2-channels at 2 ohm and ≤ 1% THD+N
Power Output: 250 watts RMS x 1 bridged at 4 ohm and ≤ 1% THD+N
THD+Noise (Distortion) (1 watt): ≤ .1%
Frequency Response (-3dB): 20Hz-20kHz
Maximum Input Signal: 10V
Maximum Sensitivity: 100mV
Dimensions: 9-5/8” x 16-11/16” x 2-1/2” (245mm x 425mm x 65mm)
Smart Engage™ Auto-Turn-On (Patent No: US06556683)
Patented Pure N-Channel Technology (Patent No: US05631608, US05783970)
Patented Power Supply (US05598325)
Input Sensitivity Switch: 100mV-1V/1V-10V
Crossover: Hi, 12dB / Low, 24dB Mono @ 85Hz, Defeat
ThunderEQ Boost: 0-18dB, Freq. 40Hz
Remote Subwoofer Level Control
Features
1. Prizm EFX – All MTX amplifiers include backlit adjustment controls on the top surface of the product.
• Color – The backlit controls offer unlimited colors on the display -- from RED, GREEN, and BLUE to any color
in between.
• EFX – You can switch Prizm EFX lighting to “pulsate” with the beat of the music.
2. Xtant Technology Cooling (XTC) – A thermal-regulated turbo-charged intercooler supplies fan forced cool air
evenly and constantly through tightly packed bonded fins. Fan speed is continuously varying and controlled
by the amplifier’s output, temperature of heatsink, and transformers. Exhaust from the internal heatsink is
strategically positioned to cool the transformers to maintain maximum performance at all volumes.
3. Bi-Level Inputs with Smart Engage™ – All MTX amplifiers feature RCA type input connections.
• Low Level Input – Source units with an output signal level of 100mV–10V may be used. See “Input
Sensitivity” for proper voltage level setting.
• High Level Inputs with Smart Engage™ – All MTX amplifiers allow high level inputs through RCA type
input connections using provided high level adapters. Source units with an output signal level of 100mV–10V
may be used. See “Input Sensitivity” for proper voltage level setting.
• Smart-Engage™ Auto-Turn-On - An auto-turn circuit is included within the amplifier. A remote turn-on
wire is not necessary when connecting the amplifier’s high-level input to a high-powered source unit (car
stereo). The amplifier will automatically turn on when music is received through this type of connection.
4. Input Sensitivity – The Input Sensitivity is used to set the proper input voltage range:
X1 POSITION: 100mV–1V (Typically for RCA Input)
X10 POSITION: 1V–10V (Typically for Speaker Level Input)

MTX Thunder TA4252 Specifications

General

Channels	4
THD at Rated Power	< 0.05%
Signal to Noise Ratio	> 100 dB
Input Sensitivity	200 mV - 6 V
Crossover Frequency	50 Hz - 250 Hz
Frequency Response	20 Hz - 20 kHz
Bass Boost	0 - 12 dB
Fuse Rating	25A

Summary

Audio Specifications

Primary Ratings

Key performance metrics like RMS power output and signal-to-noise ratio.

Secondary Ratings

Details on power output at different impedances and distortion levels.

Product Features

Prizm EFX Lighting

Backlit adjustment controls with customizable colors and beat synchronization.

Xtant Technology Cooling (XTC)

Thermal-regulated intercooler system for efficient cooling and consistent performance.

Bi-Level Inputs with Smart Engage

Supports both low and high-level RCA inputs with auto turn-on functionality.

Input Sensitivity Settings

Settings for adjusting the amplifier's input voltage range, supporting 100mV-1V or 1V-10V.

Installation and Connections

Mounting Procedures

Instructions for marking, drilling, and securing the amplifier to a mounting surface.

Wiring Connections

Detailed guidance on connecting power, ground, remote, and speaker wires.

Setup and Adjustments

Selecting Input Sensitivity Range

Guide to setting the input sensitivity based on the source unit's output voltage.

Adjusting Gain Controls

Steps to set amplifier gain to match source unit volume without distortion.

Crossover Frequency Controls

How to set the Hi/Low pass crossover points for subwoofers or speakers.

Variable ThunderEQ Bass Boost

How to use the variable bass boost feature to enhance low frequencies.

Troubleshooting Guide

No LED Indication

Identifies causes and solutions for the amplifier not showing any power indication.

LED On, No Output

Addresses issues where the amplifier powers on but produces no sound.

Distorted Audio Output

Explains why audio output may be distorted and how to fix it.

Reversed Balance or Phase

Solutions for incorrect channel wiring or phase issues affecting sound.

Weak Bass Response

Troubleshooting steps for perceived lack of low-frequency response.

Blown Fuses

Diagnosing and resolving issues that cause the amplifier's fuses to blow.