Diamond Audio MICRO88U 8-Channel Full Range Class D Amplifier

Eight channels of clean, controlled power in a chassis small enough to hide almost anywhere. The Diamond Audio MICRO88U is a full range Class D amplifier engineered for complex, multi-speaker systems — active builds, multi-zone setups, motorcycles, marine installs, UTVs, and any application where you need precise channel-by-channel control without stacking multiple amps.

The power numbers back it up: 75W x 8 at 4 ohms, 100W x 8 at 2 ohms, and 200W x 2 bridged at 4 ohms. Run it full 8-channel for a complete active system, or bridge pairs for more punch where you need it. The Class D topology keeps efficiency high and thermal load low — critical when you're mounting in a tight fairing, under a seat, or inside a marine console.

The MICRO8U is built to survive the environments where most amplifiers give up. A conformal-coated circuit board protects against moisture, salt air, dust, and vibration — making this a genuine all-weather amplifier for boats, motorcycles, ATVs, and outdoor installs. It's not a splash-resistant afterthought; it's engineered from the ground up for demanding conditions.

Selectable 2-channel or 8-channel input modes let you integrate with virtually any source unit — factory or aftermarket. The compact footprint means you're not fighting for real estate in the install, and the uniform MICRO-series platform keeps your build looking intentional.

Crossover control is split by channel group: a fixed 70Hz HPF on channels 1–4 handles your full-range speakers, while a variable 40–400Hz crossover on channels 5–8 gives you flexible sub or mid-bass tuning. Adjustable input sensitivity (0.2–10V) and a 10Hz–33kHz frequency response round out a tuning suite that works with real-world system builds.

Key Features

• 8-channel full range Class D amplifier
• 75W x 8 @ 4Ω / 100W x 8 @ 2Ω / 200W x 2 bridged @ 4Ω
• Conformal-coated PCB — all-weather rated for marine & powersports
• Selectable 2CH / 8CH input modes
• Fixed 70Hz HPF (CH1–4) + variable 40–400Hz crossover (CH5–8)
• Adjustable input sensitivity: 0.2–10V
• Compact chassis — 1.6" mounting depth
• RCA input & speaker output harness kits included