Technical Specifications

• Power Output:

  • 550W x 1 @ 4 ohms

  • 1000W x 1 @ 2 ohms

  • 1500W x 1 @ 1 ohm

• Amplifier Class: Class D (high efficiency, ideal for subwoofers)

• Frequency Response: 20 Hz to 250 Hz

• Crossover Range:

  • Low-pass: 40 Hz to 250 Hz

  • Subsonic: 15 Hz to 40 Hz

• Damping Factor: 100 (helps control speaker movement for tighter bass)

• THD (Total Harmonic Distortion): 0.03% — very clean signal

⚙️ Build & Design

• Dimensions: 2.5" x 10.5" x 18.25"

• Fuse Rating: 3 x 30A

• Voltage Range: 12V–16V

• Weight: ~14 lbs

• Connectivity:

  • Platinum-plated RCA inputs

  • Wide input sensitivity range (compatible with most head units)

  • True line output and auto-bridge feature

🛡️ Protection & Features

• Short circuit protection

• Active constant current bias tracking circuit

• High-speed, audio-grade components

• MOSFET output stages for durability and performance

🏁 Legacy & Use

The MD2D was part of the respected Merlin MD Series by US Amps, known for delivering serious power in a compact footprint. Though discontinued, it's still sought after by enthusiasts for its reliability and clean bass output — especially in subwoofer-heavy setups.

If you're considering buying one secondhand or already own it, it's a solid choice for a single-channel subwoofer amp.