Diamond Audio 5-Channel MICRO8U Series Full Range Class D Amplifier - MICRO85U

Diamond Audio 5-Channel MICRO8U Series Full Range Class D Amplifier - MICRO85U

Take total control of your sound system with the Diamond Audio MICRO8U 5-Channel Full Range Class D Amplifier, engineered for enthusiasts who want full-system power in one compact amplifier. Designed for car audio, marine, motorcycle, and powersports applications, this 5-channel amplifier delivers clean, efficient performance with the durability needed for all-weather environments.

Part of the advanced Diamond Audio MICRO8U amplifier series, this Class D 5-channel amplifier provides the perfect solution for powering front speakers, rear speakers, and a subwoofer from a single unit. With 150W x 4 + 350W x 1 at 2 ohms and 80W x 4 + 200W x 1 at 4 ohms, the MICRO8U 5-channel amplifier delivers powerful, balanced sound across your entire system, making it ideal for complete audio upgrades and custom installations.

Built for harsh conditions, the Diamond Audio MICRO8U amplifier features a conformal-coated circuit board, ensuring reliable performance in marine audio systems, motorcycles, boats, ATVs, and UTVs. This all-weather amplifier resists moisture, dust, and environmental exposure, making it perfect for outdoor and powersports use.

The compact design allows for easy installation in tight spaces, while the uniform MICRO8U platform maintains a clean, professional look. With independent front, rear, and subwoofer inputs, along with selectable REM, VOX, and DC turn-on modes, this versatile car audio amplifier integrates seamlessly into both factory and aftermarket systems.

Advanced tuning features include a fixed 70Hz high-pass filter for channels 1–4, a variable 40–400Hz crossover for the subwoofer channel, wide frequency response (10Hz–33kHz), and adjustable input sensitivity (0.2–10V) for precise system tuning.

The Diamond Audio MICRO8U 5-Channel Amplifier delivers powerful, clean, and efficient performance in a compact chassis, making it the ultimate solution for complete high-performance audio systems in any environment.

Features

• 5-channel full range Class D amplifier
• 150W x 4 + 350W x 1 @ 2Ω
• 80W x 4 + 200W x 1 @ 4Ω
• Compact all-in-one amplifier design
• Conformal-coated for all-weather durability
• Independent front, rear, and sub inputs
• Selectable REM / VOX / DC turn-on modes
• Advanced crossover and tuning controls
• Includes RCA input & speaker output harness kits

What our Experts Think  

• Compact 5-channel Class D amplifier designed for complete front/rear + subwoofer system integration in tight spaces.
• Delivers clean, efficient full-range power with low heat output and strong reliability under load.
• Part of the MICRO8U platform, enabling advanced tuning and system optimization when paired with compatible DSP control.
• Flexible channel layout supports multi-speaker setups with dedicated subwoofer power handling.
• High signal clarity ensures distortion-free performance at higher listening levels.
• Rugged, vibration-resistant construction makes it ideal for motorcycles, powersports, and custom installs.
• Best suited for users wanting a compact all-in-one amplification solution for a full system upgrade.

 
Q&A    

Q: What is the Diamond Audio MICRO85U?
A: Diamond Audio MICRO85U 5-Channel MICRO8U Series Class D Amplifier is a compact high-efficiency 5-channel Class D amplifier designed for full-system audio setups in cars, motorcycles, marine, and powersports applications.

Q: How much power does it deliver?
A: It produces approximately 80W x 4 @ 4Ω plus 200W–350W x 1 for the sub channel, or up to ~1000W+ total RMS depending on impedance and configuration.

Q: What makes the MICRO85U different from standard amplifiers?
A: It combines four full-range channels plus a dedicated subwoofer channel in a single ultra-compact chassis, using Class D efficiency for low heat and low current draw.

Q: Is it suitable for motorcycles and powersports use?
A: Yes. It is conformal-coated and designed for vibration, moisture, and temperature extremes, making it ideal for Harley-Davidson and off-road builds.

Q: Can it run a full audio system?
A: Yes. It can power front and rear speakers plus a subwoofer, making it a complete all-in-one amplifier solution for most basic to mid-level systems.

Q: What is the main benefit of this amplifier?
A: It delivers a full 5-channel system in a micro footprint, reducing installation space while maintaining strong, clean output and system flexibility.

Maintenance Tips    

• Install in a dry, well-ventilated location to ensure proper heat dissipation.
• Regularly check all power, ground, and speaker connections for tight, corrosion-free contact.
• Inspect RCA, signal, and input cables for secure fit and wear or damage.
• Keep amplifier free from dust using a soft, dry cloth or low-pressure air.
• Avoid blocking heatsinks or ventilation fins during operation.
• Ensure stable voltage supply to prevent clipping, distortion, or shutdowns.
• Properly set gain, crossover, and channel balance to protect speakers.
• Avoid exposure to moisture, high humidity, or direct water spray.
• Always power off the system before adjusting wiring or settings.
• Periodically check for vibration-related loosening in motorcycle or mobile installations.