Diamond Audio MICRO85U 5-Channel Full Range Class D Amplifier

One amplifier. Every speaker in your system. The Diamond Audio MICRO85U is a 5-channel full range Class D amplifier built for enthusiasts who refuse to compromise — delivering clean, high-efficiency power to front speakers, rear speakers, and a subwoofer from a single compact chassis. Whether you're building out a car, boat, motorcycle, UTV, or ATV, the MICRO85U handles it all.

Power output is serious: 150W x 4 + 350W x 1 at 2 ohms, or 80W x 4 + 200W x 1 at 4 ohms. That's enough headroom to run a full active system without breaking a sweat. The Class D design keeps heat low and efficiency high, so you're not robbing your electrical system to get great sound.

Built for real-world conditions, the MICRO5U features a conformal-coated circuit board that shrugs off moisture, dust, and vibration — making it a legitimate all-weather amplifier for marine and powersports installs where lesser amps fail. This isn't a marketing claim; it's a design decision baked into every unit.

Installation flexibility is built in. Independent front, rear, and subwoofer inputs give you precise control over each zone, while selectable REM, VOX, and DC turn-on modes mean it plays nice with factory head units, aftermarket decks, and everything in between. The slim 1.4" mounting depth opens up install locations that a standard amp simply won't fit.

Tuning is dialed in with a fixed 70Hz HPF on channels 1–4 and a variable 40–400Hz crossover on the sub channel, plus adjustable input sensitivity (0.2–10V) and a 10Hz–33kHz frequency response that covers the full audible range and then some.

Key Features

• 5-channel full range Class D amplifier
• 150W x 4 + 350W x 1 @ 2Ω / 80W x 4 + 200W x 1 @ 4Ω
• Conformal-coated PCB — all-weather rated for marine & powersports
• Independent front, rear & sub inputs
• Selectable REM / VOX / DC turn-on modes
• Selectable 2CH / 5CH input modes
• 1.4" mounting depth — fits tight installs
• RCA input & speaker output harness kits included