Diamond Audio DMD600.4D 4-Channel Full Range Class D Amplifier

Compact Power, Unbeatable Value. The Diamond Audio DMD600.4D is a 4-channel full-range Class D digital amplifier engineered to deliver clean, efficient power in a compact chassis. It is a strong fit for car, truck, and space-conscious audio builds that need four channels of dependable output without stepping up to a much larger amplifier.

The DMD600.4D produces 100 watts RMS x 4 at 4 ohms, 150 watts RMS x 4 at 2 ohms, and can be bridged for 320 watts RMS x 2 at 4 ohms. Balanced differential inputs, variable crossovers, bass boost, and multiple turn-on modes make it easy to integrate with both factory and aftermarket source units.

Power Output

• 100W RMS x 4 @ 4Ω
• 150W RMS x 4 @ 2Ω
• 320W RMS x 2 bridged @ 4Ω

Key Features

• 4-channel full-range Class D digital amplifier
• Compact, high-efficiency heat-sink design
• 4-layer FR4 PCB construction
• Advanced SMD circuitry
• Balanced differential inputs for cleaner, noise-resistant signal transfer
• Selectable 2-channel / 4-channel input modes
• REM, VOX, and DC auto turn-on options
• Variable high-pass and low-pass crossover controls
• Up to 18dB bass boost
• LED power / protection indication
• Built-in short-circuit, thermal, and voltage protection

Crossover & Tuning

• Variable High-Pass Filter: 35Hz–350Hz
• Variable Low-Pass Filter: 35Hz–350Hz
• Crossover Slope: 12dB/octave
• Bass Boost: up to 18dB

Technical Specifications

• Power Supply Threshold: 10.0V–17.0V DC
• Idle Current: 0.7A
• THD @ 1kHz / 4Ω: 0.05%
• S/N Ratio A-weighted @ 1W: -77.2dBA
• S/N Ratio A-weighted @ Full Power: -98.9dBA
• Low-Level Input Sensitivity: 0.2V–10.0V
• High-Level Input Capability: up to 25W RMS
• Low-Level Input Impedance: 22kΩ
• High-Level Input Impedance: 22kΩ
• Output Impedance: 0.047Ω
• Damping Factor @ 50Hz / 4Ω: >250
• Bandwidth (-3dB): 10Hz–350Hz
• Fuse Rating: 3 x 40A

Dimensions

7.6" L x 6.85" W x 1.9" H (193.1mm x 174mm x 48.4mm)

The DMD600.4D is designed as a practical, budget-conscious upgrade for full-range speaker systems, component sets, and bridged configurations where compact size, flexible tuning, and clean four-channel power are priorities.