Martin Audio MA5.2K – Lightweight 1U Dual-Channel Class‑D Amplifier

A high-efficiency, dual-channel amplifier delivering substantial output in a compact, rack-friendly format. Ideal for live sound reinforcement and fixed installation with remote control capabilities.

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Power Output

• 4 Ω: 2,600 W per channel
• 2 Ω: 2,800 W per channel
• 8 Ω: 1,400 W per channel
• Operates at approximately 95% power supply efficiency, minimizing heat and maximizing reliability

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Audio & Interface

• Interactive LCD matrix display with multi-function LED bargraphs
• Digital push-button menu navigation with smart card slot for saving/restoring amplifier settings
• Network-ready remote control and diagnostics via PC interface
• Front-panel selection for gain attenuation and max output/current limits

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Protection & Cooling

• Comprehensive protection: clip limiter, thermal sensing, overload, short-circuit, DC fault
• Temperature-controlled air cooling system with intelligent fan speed control
• Soft-start sequence to prevent speaker turn-on transients

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Technical Specifications

Parameter	Value
Channels	2 (bridgeable)
Output Power (4 Ω)	2,600 W / channel
Output Power (2 Ω)	2,800 W
Output Power (8 Ω)	1,400 W
THD	< 0.05% typical
S/N Ratio	> 112 dBA
Damping Factor	> 5,000 (20–200 Hz at 8 Ω)
Slew Rate	~50 V/µs
Gain Settings	26 / 29 / 32 / 35 dB selectable
Input Connectors	Dual XLR analog (link via XLR)
Output Connectors	Two Speakon outputs
Control/Data Interface	RS‑485 via RJ45; smart card slot
Power Supply	95–265 VAC, power factor corrected
Rack Size / Weight	1U format, ~8 kg

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Typical Use Cases

• High-output point-source or line-array systems using Martin Audio CDD, WS, or niche loudspeakers
• Live touring and fixed installations needing compact power with DSP or external controllers
• Applications requiring remote monitoring and preset recall across multiple units
• Environments valuing high headroom, reliable speaker protection, and low idle heat