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RoadThunder RT500D 1000W Peak Mono Block Class D Amplifier

The perfect amplifier for any enthusiast looking to add subwoofers to their vehicles system whether it is factory or aftermarket. The RT500D is designed to deliver nothing but power for driving extreme bass!

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The Road Thunder RT500D car audio amplifier is a masterpiece of power, efficiency, and sound quality packaged in a form that is easily mounted and displayed or hidden anywhere in your vehicle. The RT500D includes a ton of technology that has been perfected over 25 years industry experience in manufacturing unbeatable car audio amplifiers. It can output up to 500-watts RMS power into a 2Ω impedance load making it perfect for driving dual 12" subwoofers.

Patented Class D

The RT500D uses a patented circuit, Adapative Class D, that reduces interference caused by rogue frequencies generated by the internal MOSFETs during use. This ensures that your bass notes are clear and defined, delivering the bone rattling bass you want from your subwoofers without any unwanted noise. Additionally, this circuit effectively manages heat build up in the amplifier and dissipates it across the heat sink ensuring long play times with no interruptions. The circuit board is dual layer with twice as many copper traces as competitive amplifiers ensuring reliability.

System Engaged

Connecting the RT500D to a factory system is very easy using its integrated Smart Engage technology. This technology allows you to tap directly into your vehicle's factory speakers to get signal to the amplifier as well as to turn it on. This means you dont even need to take the radio out of the dashboard in order get everything working using the included low to high level adapter cables.

The RT500D includes a wired external bass control allowing you to control the bass level from the driver's seat.

Dimensions & Details


  • 2Ω RMS Power Output: 500W x 1 Channel
  • 4Ω RMS Power Output: 250W x 1 Channel
  • THD: < 1%
  • 1Ω RMS Power Output: N/A
  • 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: 11 3/8" (28.89 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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