Martin Audio MA12K

Martin Audio MA12K – Dual-Channel High-Power Class‑D Amplifier

The Martin Audio MA12K is a powerful, lightweight 2-channel amplifier engineered for professional touring and fixed sound installations. It delivers exceptional power density, audio clarity, and reliability in a compact 1U rackmount format.

Power Output

• 2 × 6,000 W @ 2 Ω
• 2 × 4,000 W @ 4 Ω
• 2 × 2,000 W @ 8 Ω
• Bridged mono:
  • 12,000 W @ 4 Ω
  • 8,000 W @ 8 Ω
  • 4,000 W @ 16 Ω

Performance & Design

• Class‑D PWM topology with over 95% efficiency
• THD+N: < 0.05% at full rated power
• Slew rate: 50 V/μs
• Signal-to-noise ratio: > 110 dB (A-weighted)
• Damping factor: > 5,000 (20 Hz–200 Hz at 8 Ω)

Control & Interface

• LCD matrix display with menu-driven interface
• Selectable gain: 26 / 29 / 32 / 35 dB
• Smart card slot for storage and transfer of settings
• Network-ready via RS-485 (remote monitoring and control)
• Front-panel indicators for signal, clip, thermal, protect, and power status

Protection & Reliability

• Comprehensive protection circuitry:
  • Over-temperature
  • Short circuit
  • DC output
  • Clip limiter
  • Power-on/off muting
• Intelligent fan cooling with temperature-dependent variable speed
• Soft-start power-up sequence
• Universal power supply with active power factor correction (PFC)

Physical Specs

• Rack Size: 1U
• Dimensions: 483 mm (W) × 44 mm (H) × 475 mm (D)
• Weight: Approx. 12 kg
• Power Input: 95–265 VAC, 47–63 Hz

Applications

• High-powered touring systems
• Subwoofer amplification
• Large-scale sound reinforcement
• Clubs, arenas, outdoor festivals
• Integration with Martin Audio line arrays and full-range systems