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RoadThunder RT250D 250W RMS Mono Block Class D Amplifier

250W RMS 2 Ohm Stable Mono Block Class D Amplifier

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Road Thunder amplifiers were designed with over 25 years of amplifier experience to exceed your expectations. Brushed aluminum top covers incorporate high end materials with convection cooling functionality. Each Road Thunder amplifier is designed to perform to the highest standard and have undergone rigorous quality testing to ensure this standard is met.

Key Features:

  • Patented Adaptive Class D Technology for Optimal Efficiency
  • Patented Smart Engage Auto Turn On
  • Surface Mount Design for Resistance to Vibration
  • Dual Sided Fiberglass Printed Circuit Board
  • Convection Cooled Design
  • Includes External Bass Control

The RT250D was designed for bulletproof reliability. This small chassis amplifier utilizes multiple MTX patented technologies to deliver exceptional sound quality and performance. Patented Adaptive Class D design, reduces radio frequency interference (RFI) that is generated in traditional class D designs by the MOSFET switching. Adaptive class D shifts generated frequencies away from the radio band ensuring superior sound quality. Patented Smart Engage auto turn on reduces installation time by allowing you to take signal from the rear deck speakers in your vehicle and connect them to the amplifier's input. When signal is sensed in the speakers, the amplifier will automatically turn on eliminating the need to run a remote wire.

Intelligent Surface Mount design reduces cross talk between amplifier component sections. Using smaller more vibration resistant parts, the sections of the amplifier can each be placed into their own "neighborhood" reducing cross talk interference and improving sound quality. The dual sided circuit board ensures maximum current and signal transfer across the board, making the amplifier extremely efficient in producing sound but also in dissipating heat from critical components.

No matter what type of bass you are looking for, big and boomy for rap or hip-hop or something with more precision for rock or country, the RT250D is sure to deliver an exceptional performance that is more than expected.

Dimensions & Details


  • Power Output: 125 Watts RMS x 1 Channel at 4 Ohms
  • Power Output: 250 Watts RMS x 1 Channel at 2 Ohms
  • THD: < 1%
  • Maximum Input Signal: 4v
  • Crossover: Variable Low @40Hz to 200Hz, 24dB/Oct
  • Subsonic Filter: 20Hz to 50Hz,12dB/Oct, Variable
  • Bass Boost: +12dB @ 40Hz
  • Height: 7 1/16" (17.94 cm)
  • Width: 10" (25.4 cm)
  • Depth: 2 1/8" (5.4 cm)

Returns & Warranty

30-Day Money-Back Guarantee

At MTX Audio, we are serious about sound®. Therefore, if you are not "blown away" with your purchase, for any reason, you can return any items purchased directly from that are complete and like new within 30 days. Products purchased from authorized MTX retailers must be returned through that same retailer. Products purchased through non-authorized MTX retailers may not be returned.

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Warranty Information

MTX products purchased in the USA from an authorized MTX dealer are guaranteed against defects in material and workmanship for the period of time specified below, the warranty period begins the day the product is purchased by the end user. This warranty is limited to the original retail purchaser of product and extends only to products purchased from authorized MTX resellers. Product found to be defective during that period will be repaired or replaced by MTX at no charge.

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