MTX Audio XTHUNDER Series 500W RMS 4 Channel Amplifier - XT125.4

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  • Regular price $699.00

Continuing the Legacy that MTX Audio started almost 30 years ago with the development of the Thunder amplifier series, we introduce the next generation – XTHUNDER. These amplifiers are designed to deliver extreme power to the most demanding speaker system designs and are capable of driving subwoofers and full range speakers alike.

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


Class A/B Topology 2Ω Stable Bridgeable

Class A/B Topology Delivers Excellent Sound Quality
Low Profile Design Allows for Installation Anywhere
Cast Aluminum Top Cover Efficiently Dissipates Heat
Variable High Pass Crossover
Variable Butterworth Crossover 12dB/Oct
Fixed Bass Boost Is Ideal for Use with Subwoofers
Thermal, DC Offset, and Short Circuit Protection Circuitry
Tech Specs
4 Ohm RMS Power Output

90 Watts x 4

250 Watts x 2 Bridged 

Signal to Noise Ratio


2 Ohm RMS Power Output

125 Watts x 4

THD <0.2%
Frequency Response 20Hz - 20kHz
Maximum 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)