• Sinister-SDX4 | 4 Channel Marine Amplifier
  • Sinister-SDX4 | 4 Channel Marine Amplifier
  • Sinister-SDX4 | 4 Channel Marine Amplifier
  • Sinister-SDX4 | 4 Channel Marine Amplifier
  • Sinister-SDX4 | 4 Channel Marine Amplifier
  • Sinister-SDX4 | 4 Channel Marine Amplifier
  • Sinister-SDX4 | 4 Channel Marine Amplifier
  • Sinister-SDX4 | 4 Channel Marine Amplifier
  • Sinister-SDX4 | 4 Channel Marine Amplifier
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Wet Sounds

Sinister-SDX4 | 4 Channel Marine Amplifier

Sinister-SDX4 | 4 Channel Marine Amplifier

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$1,799.99
$1,799.99
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Important: Always read the entire product description, including Features, Important Notes, Specifications, and Fitment data, before making a purchase. Components contained in images and descriptions may change based upon your selections.

The Wet Sounds Sinister-SDX4 4 Channel Marine Amplifier is engineered for high-efficiency, high-output performance in marine and powersports audio systems. Built with Wet Sounds exclusive Class D architecture and MAXED power supply technology, the SDX4 delivers strong, clean power while minimizing strain on the electrical system.

Designed for versatile system integration, the SDX4 provides flexible 4-channel output for full-range speaker systems or multi-zone audio configurations. Its high-efficiency design reduces current draw and heat generation, supporting longer play time and consistent performance in demanding environments.

The amplifier features a full cast aluminum chassis shared across the Sinister Series, ensuring consistent sizing across models for simplified installation and a clean, uniform system layout. Internal layered PCB construction and advanced microprocessor control provide stable performance and system protection under load.

The SDX4 includes remote level control, removable speaker plugs, and high-level speaker inputs for flexible installation and tuning. A backlit LED badge adds a refined visual detail for custom marine installations.

Built for harsh marine environments, the Sinister-SDX4 is backed by a Wet Sounds 2-year limited warranty and designed for reliable multi-channel system performance.

Applications

  • Marine full-range speaker systems
  • Powersports vehicles (UTV, ATV, SxS)
  • Motorcycle audio systems
  • Jeep and off-road audio builds
  • Golf cart audio systems
  • Custom marine and outdoor audio installations

Features

  • Wet Sounds exclusive Class D power supply architecture
  • MAXED high-efficiency power supply technology
  • 4-channel high-output marine amplifier design
  • Reduced current draw and heat for improved efficiency
  • Full cast aluminum chassis shared across Sinister Series
  • Layered PCB and advanced microprocessor control
  • Remote level control included
  • High-level inputs and removable speaker plugs
  • LED-illuminated badge design
  • Marine-grade construction for harsh environments
  • 2-year limited warranty