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XTHUNDER125.4

$544.55

Thunder Speaker Power

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.

The XTHUNDER125.4 four channel amplifier powers high wattage speaker systems with room to spare, and without added distortion or over-heating during long hours of loud play.


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.

Using high end materials and a dedication to precision workmanship, the XTHUNDER Series deliver exceptional sound quality and performance.

XTHUNDER 125 Key Features:

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

Built To Drive Powerful Speaker Systems

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.