Diamond Audio 5-Channel HEX Series Full Range Class D Amplifier - HX1200.5D

Diamond Audio 5-Channel HEX Series Full Range Class D Amplifier - HX1200.5D

Upgrade your entire audio system with the Diamond Audio HX1200.5D HEX Series 5-Channel Full Range Class D Amplifier, engineered for enthusiasts who demand clean power, efficiency, and total system control. This 5-channel car audio amplifier is designed to power front speakers, rear speakers, and a subwoofer from a single chassis, delivering dynamic, full-range sound with exceptional clarity.

Built with advanced Class D amplifier technology, the Diamond Audio HX1200.5D amplifier maximizes power output while minimizing heat and electrical strain. It delivers 100W x 4 + 480W x 1 at 4 ohms and 150W x 4 + 800W x 1 at 2 ohms, making it ideal for complete car audio system upgrades and custom installations. The dedicated subwoofer channel provides deep, controlled bass, while the full-range channels ensure crisp highs and detailed mids.

Engineered with audiophile-grade high-tolerance components, the HX1200.5D HEX Series amplifier features a 4-layer PCB board with balanced differential inputs, ensuring clean, noise-free signal transmission. Premium SNAP capacitors and advanced circuitry deliver accurate sound reproduction and long-term reliability.

For advanced tuning, the Diamond Audio HX1200.5D Class D amplifier includes variable high-pass crossovers (40Hz–400Hz) for channels 1–4, a low-pass crossover (30Hz–300Hz) for the subwoofer channel, and a subsonic filter (10Hz–55Hz). These controls allow precise system optimization for balanced sound staging and powerful bass response.

The amplifier features an anodized extruded aluminum heat sink for superior thermal performance, while the compact yet powerful design allows easy installation in cars, trucks, and SUVs. Additional features such as output clip indicators, top-mounted controls, and an included bass remote control make setup simple and precise.

The Diamond Audio HX1200.5D HEX Series Amplifier delivers powerful, clean, and perfectly balanced sound, making it the ultimate solution for high-end, all-in-one car audio systems.

Features

• 5-channel full range Class D amplifier
• 100W x 4 + 480W x 1 @ 4Ω / 150W x 4 + 800W x 1 @ 2Ω
• All-in-one system amplifier for speakers and subwoofer
• Audiophile-grade high-tolerance components
• 4-layer PCB with balanced differential inputs
• Variable crossovers and subsonic filter
• Output clip indicators for precise tuning
• Anodized aluminum heat sink for efficient cooling
• Includes bass remote control

What our Experts Think

   
Q&A    

Q: What is the Diamond Audio HX1200.5D designed for?
A: It is a 5-channel full-range Class D amplifier designed to power complete car audio systems with speakers and subwoofers.

Q: What are the benefits of a 5-channel amplifier?
A: It lets you run multiple speakers and a subwoofer from one amplifier, simplifying installation and system setup.

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

Q: Can the HX1200.5D improve factory audio systems?
A: Yes. It delivers cleaner power, increased volume, and improved overall sound performance for aftermarket upgrades.

Q: Is this amplifier suitable for custom audio builds?
A: Yes. Its versatile 5-channel design makes it ideal for custom car, truck, and powersports audio installations.

Maintenance Tips    

• Clean the amplifier with a soft, dry microfiber cloth to remove dust and debris.
• Keep cooling fins and ventilation areas clear to prevent overheating.
• Inspect power, ground, RCA, and speaker connections regularly for tight, corrosion-free contacts.
• Ensure the amplifier is securely mounted to reduce vibration and connection stress.
• Set gain, crossover, and bass controls correctly to prevent clipping and protect connected speakers.
• Avoid prolonged operation at maximum output to extend amplifier lifespan.
• Check fuses, terminals, and wiring periodically for wear, overheating, or loose connections.
• Keep the amplifier protected from excessive heat, moisture, and direct sunlight.