The Yamaha EMX66M is a 6-channel powered mixer that combines amplification, mixing, and effects processing in a single unit. Designed for live sound reinforcement and recording, it delivers 600 W total output power through dual 300 W (4-ohm) amplifiers configurable for main stereo, mono plus auxiliary, dual auxiliary, or mono bridge operation. The mixer accommodates balanced XLR and 1/4″ inputs on channels 1-4 with switchable phantom power and pads, plus unbalanced inputs on channels 5-6. Each input channel provides 3-band parametric EQ. Two independent 7-band graphic equalizers (125 Hz to 8 kHz) serve the main and monitor outputs. Eight digital effects presets—comprising two echo and six reverb algorithms—employ digital signal processing for on-board effects treatment. An internal limiter protects against amplifier overload and clipping. LED metering displays signal levels at main and monitor outputs, with dedicated limiter indication. Record outputs via RCA connectors and a 2-track input for external sources are standard. Speaker outputs accommodate 1/4″ TS connectors for direct loudspeaker integration.
Technical Specifications
• Input Channels: 6 total—channels 1-4 feature balanced XLR with switchable +15 V phantom power and pads, plus balanced 1/4″ jacks; channels 5-6 accept two unbalanced 1/4″ inputs each
• Equalization: 3-band per-channel EQ (100 Hz shelving, 2.5 kHz peak, 1 kHz shelving); dual 7-band graphic EQ (125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz) assignable to main and monitor outputs
• Power Output: 600 W total; dual 300 W (4-ohm) amplifiers with four switching modes—MAIN-MAIN, MONO + AUX, AUX1 + AUX2, or MONO BRIDGE
• Digital Effects: Eight presets (2 echo, 6 reverb) via digital signal processing
• Output Connectors: Speaker outputs (1/4″ TS), RCA record outputs, 2-track input
• Protection: Internal limiter with LED indicator; phantom power switchable per channel
• Metering: LED level indicators for MAIN OUT and MONITOR OUT; LIMITER indicator
• Power Requirements: 120 V AC; incorporates EEEngine technology for efficient operation
– Key Features
• Configurable power amplifier modes for flexible system topologies
• Per-channel phantom power switching for condenser microphone support
• Dual graphic EQ sections for independent main and monitor output shaping
• Built-in limiting prevents amplifier damage from overload conditions
– Typical Applications
• Live band reinforcement and venue sound systems
• Solo performer amplification with monitor capability
• Recording applications with integrated mixing and effects
• Subwoofer-driven systems via mono bridge configuration
– Compatibility & Integration
Balanced and unbalanced inputs accommodate standard microphone and line-level sources. RCA record outputs interface with external recording equipment. Speaker outputs drive passive loudspeaker systems via 1/4″ connections. Dual power amplifier topology permits independent main and auxiliary speaker feeds.
