XTHUNDER125.4 500W RMS 4-Channel Class A/B Amplifier

Car Amplifiers:


Designed to Be Heard Even With the Top Down

Availability: In stock
Customers rate this product:
Share this product:

The XTHUNDER125.4 is the latest evolution of the Thunder amplifier series that MTX Audio made famous almost 20 years ago. These amplifiers are designed to deliver extreme power to the most demanding systems whether they be subwoofers or full range speakers. Using high end materials and a dedication to precision workmanship, the XTHUNDER Series deliver exceptional sound quality and performance.

Key Features:

  • Class A/B Topology
  • Low Profile Design
  • Variable High Pass Filter
  • Extruded Aluminum Top Cover

The XTHUNDER125.4 utilizes class A/B amplifier topology to deliver the highest sound quality possible. Capable of delivering 125W RMS power per channel into a 2Ω load, the XTHUNDER125.4 is ideally suited to power MTX Signature Series and THUNDER series speakers.

The unit features a dual sided circuit board wiith increased copper traces that maximize electrical transfer and minimize power lost before it gets to your speakers. The surface mount technology, is incredibly durable and vibration resistant, allowing them to be damage resistant even when deployed in big systems. The entire top cover functions as a heat sink with a lot of surface area to effectively dissipate heat so that it can play louder and longer. The top cover includes removable side covers that allow for easy access to connections and settings even after installation.

The feature set on the XTHUNDER125.4 is loaded and enables full customization to ensure the best possible sound quality without distortion. Customization includes variable high and low pass filters and the unit can be connected using either high or low level connectors.

Remember, you cannot install an amplifier without an amplifier kit. MTX recommends using a ZN5K-04 or ZN5K-08 to power the XTHUNDER125.4.

StreetWires 20% Off

Class A/B Topology Delivers Excellent Sound Quality
Low Profile Design Allows for Installation Anywhere
Extruded Aluminum Top Cover Efficiently Dissipates Heat
Variable High Pass Crossover
Fixed Bass Boost Is Ideal for Use with Subwoofers
4 Ohm RMS Power Output 90 Watts
Signal-to-noise Ratio (1Watt) >70dB
2 Ohm RMS Power Output 125 Watts
THD+N (Distortion) (1 Watt) <0.2%
Frequency Response 20Hz - 20kHz
Max Input Signal 5V
Max Sensitivity 100mV
High Pass Filter Variable, 40Hz - 250Hz, 12dB/Oct Front/Rear
Bass Boost 12dB @ 45Hz
Topology Class A/B
Depth 8.9" (226.7mm)
Length 14.2" (359.9mm)
Height 2.03" (51.5mm)

How to Set Your Amplifier Gain Using Ohm's Law

Join Us!