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Diamond Audio

Diamond Audio 1-Channel HXM Series Class D Monoblock Amplifier - HXM1200.1D

Diamond Audio 1-Channel HXM Series Class D Monoblock Amplifier - HXM1200.1D

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Diamond Audio 1-Channel HXM Series Class D Monoblock Amplifier - HXM1200.1D

Unleash extreme bass performance with the Diamond Audio MOTORSPORT Series 1-Channel Class D Monoblock Amplifier, engineered for high-output systems that demand power, precision, and durability. Designed for marine audio, motorcycles, UTVs, ATVs, and powersports applications, this high power monoblock amplifier delivers exceptional performance in the toughest environments.

Built with advanced full-range Class D digital technology, the Diamond Audio MOTORSPORT monoblock amplifier produces massive output with 1200W RMS at 1 ohm, 850W at 2 ohms, and 550W at 4 ohms, making it ideal for driving high-performance subwoofers. Whether you're upgrading your marine subwoofer system or building a powerful off-road audio setup, this subwoofer amplifier delivers deep, tight, and controlled bass.

Designed for durability, this water-resistant amplifier features conformal-coated multi-layer circuit boards, protecting against moisture, dust, and harsh outdoor conditions. The anodized extruded aluminum heat sink ensures superior thermal performance, keeping the amplifier cool even under heavy load.

The Diamond Audio MOTORSPORT amplifier also includes balanced differential inputs for noise-free signal transmission and a DirectFET power MOSFET output stage for efficient, high-quality performance. With a variable low-pass crossover (30Hz–300Hz), subsonic filter (10Hz–55Hz), and phase control, this versatile monoblock amplifier allows precise tuning for optimal bass response.

Installation is seamless with selectable REM, VOX, and DC turn-on modes, ensuring compatibility with factory and aftermarket systems. Additional features such as output clip indicators, top-mounted controls, and an included bass remote control provide convenience and real-time system adjustment.

The Diamond Audio MOTORSPORT Monoblock Amplifier delivers powerful, reliable, and precision-tuned bass, making it the ultimate solution for high-performance outdoor and marine audio systems.

Features

• 1-channel Class D monoblock amplifier
• 1200W @ 1Ω / 850W @ 2Ω / 550W @ 4Ω RMS power
• Water-resistant design for marine and powersports use
• Conformal-coated circuit boards for durability
• Variable LPF, subsonic filter, and phase control
• Balanced differential inputs for clean signal
• Anodized aluminum heat sink for efficient cooling
• Output clip indicators for precise setup
• Includes bass remote control

What our Experts Think
  • High-power bass solution – The HXM1200.1D HXM Series monoblock amplifier is designed to deliver strong, controlled bass for marine, motorcycle, UTV, ATV, and powersports audio systems.
  • Massive Class D output – Produces 1200W RMS @ 1Ί, 850W RMS @ 2Ί, and 550W RMS @ 4Ί, making it a powerful match for high-performance subwoofers.
  • Efficient amplifier technology – Full-range Class D design provides high output with reduced heat and improved power efficiency for demanding audio builds.
  • Built for rugged environments – Features conformal-coated circuitry and durable aluminum heat-sink construction to help handle moisture, vibration, and outdoor conditions.
  • Precision bass tuning – Adjustable low-pass crossover, subsonic filter, phase control, and clip indicators allow accurate system setup.
  • Clean signal performance – Balanced differential inputs help reduce noise and maintain clear bass response in custom audio installations.
  • Expert choice for serious builds – Ideal for enthusiasts wanting deep, powerful bass from a compact amplifier designed for premium mobile audio systems.
   
Q&A    

Q: What is the Diamond Audio HXM1200.1D designed for?
A: It is a 1-channel Class D monoblock amplifier built to power subwoofers with strong, efficient bass performance.

Q: What are the benefits of Class D amplification?
A: Class D technology provides high efficiency, powerful output, reduced heat, and a compact design.

Q: Is the HXM1200.1D suitable for marine and powersports use?
A: Yes. The HXM Series is designed for boats, motorcycles, UTVs, and other outdoor audio applications.

Q: Can this amplifier power a subwoofer system?
A: Yes. Its monoblock design is optimized for driving compatible subwoofers with deep, controlled bass.

Q: Does it include bass tuning controls?
A: Yes. It features adjustable controls to help customize bass output and optimize system performance.


Maintenance Tips    
  • Clean the amplifier with a soft, dry microfiber cloth to remove dust and debris.
  • Keep cooling fins and ventilation areas clear for proper heat dissipation.
  • Inspect power, ground, and speaker connections regularly for tight, corrosion-free contacts.
  • Ensure the amplifier is securely mounted to minimize vibration-related damage.
  • Set gain and bass controls correctly to prevent clipping and protect connected subwoofers.
  • Avoid prolonged operation at maximum output to extend amplifier lifespan.
  • Check fuse holders, terminals, and wiring periodically for wear or overheating.
  • Keep the amplifier protected from excessive heat, moisture, and direct sunlight.