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Proficient M4 is a 4-zone, 6-source multi-zone audio amplifier/controller from Proficient Audio Systems, designed for whole-home or multi-room audio distribution.In excellent condition, it would appear nearly new with minimal to no visible wear: a clean black chassis, pristine front panel with clear labeling and functional buttons/LED indicators, unscratched display or controls if present, and a rear panel with all connectors intact and dust-free. Internally, it would show no signs of heavy use, with original components in good working order, reliable power supply, and full functionality for switching and amplification.Key Features- **4 independent stereo zones** with individual control for volume, source selection, and power.- **6 audio source inputs** for switching between different audio components (e.g., tuners, CD players, streaming devices, etc.).- Built-in IR control capabilities (source and zone IR outs) for integrating with other AV equipment.- Keypad support via CAT5 (up to 1000' runs), with options for master keypads, numeric/function keypads, and expandability.- Party mode and other linking features for multi-zone synchronization.- Pre-outs for each zone to connect external amplifiers if more power is needed.- Rack-mountable design suitable for custom installations.### Specifications (from manufacturer documentation)**Audio Performance:**- **Rated Power/Channel**: 30 Watts RMS into 8Ω.- **Power/Channel (1kHz)**: 45 Watts RMS into 4Ω.- **THD (at rated power)**: < 0.7%.- **Frequency Response**: 20Hz–20kHz ±1.5dB (at 1 watt into 8Ω).- **Signal-to-Noise Ratio**: >95dB (IEC A-weighted, re: rated output, source inputs shorted).- **Input Sensitivity**: 300 mV (for rated power at max volume control).- **Input Impedance**: >22 kΩ.- **Input Overload**: 2.5 V.- **Bass/Treble Control**: ±10dB @ 100Hz / ±10dB @ 10kHz.- **Crosstalk Between Sources**: >65dB @ 10kHz.- **Channel Separation**: >50dB @ 10kHz.- **Pre-Outs**: Output voltage up to ~1.7V (VC max) or 810mV (NVC), impedance <300Ω.**Power and General:**- **Power Consumption**: ~50W idle (no signal); ~110W at 1/8 rated power.- **AC Power**: 120V AC version (1.8A, fuse T5AL 250V) or 230V version.- **Dimensions (H x W x D)**: Approximately 5 3/16" x 17 1/8" x 15 1/2" (148mm x 435mm x 394mm).- **Weight**: ~20 lbs (9.1 kg).**Control and Connectivity:**- Supports various keypads and IR integration.- Contact closures, status outputs, doorbell/page inputs, etc.- Expandable in multi-unit setups (up to certain zone limits when daisy-chained or linked with compatible models).
Generating expert take…
Proficient Audio is a U.S. brand best known in custom-install and whole-house audio, with roots going back to the mid-1990s; the company says it was founded in 1994. It was built for audio-video integrators rather than the traditional specialty-retail hi-fi channel, and its identity has long centered on practical, system-friendly products for homes, patios, and outdoor spaces. I could not verify a widely cited founder name from the available information.
Its lineup focuses on installed-audio essentials: architectural and outdoor speakers, subwoofers, whole-home audio solutions, and related electronics and accessories such as volume controls. The brand’s offerings are geared more toward complete system building than standalone audiophile source components, with an emphasis on reliability, weather resistance, and flexible deployment across rooms and zones. Recent marketing also highlights its Signature subwoofer line and other performance-oriented speaker products.
In the market, Proficient sits in the custom-install and mid-tier performance segment rather than the ultra-high-end or collector sphere. Its reputation is based on dependable sound, broad application, and value for integrators, not luxury cachet or exotic engineering. For buyers, it is a practical, established choice when the priority is getting solid, consistent distributed audio rather than chasing audiophile prestige.
See all Proficient Audio listings on RADAR.
