The Yamaha PM4000 is an analog console for professional live sound environments, with a modular architecture that allows configurations of 24, 32, 40 or 48 mono inputs plus optional stereo channels. It offers up to 48 mono channels and 8 stereo channels, 8 mono and 2 stereo auxiliary buses that can be used as dual mono, 8 subgroups, a main stereo bus and an 11 x 8 matrix for independent, customizable sends. Each channel has a fully parametric 4-band equalizer and a variable high-pass filter. It incorporates 8 VCA groups with mute and assignment functions, as well as 8 programmable master mute groups. It includes dedicated VU meters for outputs and auxiliary buses, per-channel gain LED indicators, and a built-in test oscillator and pink noise generator. Its construction is rugged, with a reinforced metal chassis, easily serviced interchangeable modules and an active ventilation system with multiple rear fans. It also offers LED illumination on buttons and indicators, flexible assignment of inputs to buses and manual non-motorized control faders. The frequency response is 20 Hz to 20 kHz, with total harmonic distortion below 0.1% at the main outputs, ensuring high fidelity and signal quality throughout the audio path.