The Yamaha MX-35 is a vintage multi-channel power amplifier from Yamaha's well-known Natural Sound series. This model was produced in the late 80s and early 90s and is known for its flexible design, where you can switch between a 2-channel (stereo) or 4-channel configuration. Originally, the amplifier was often used to control surround or 'presence' speakers in early home cinema setups (such as the legendary Yamaha DSP-1 processor). Today it is a popular and compact model for stereo use or multiroom systems. Key specifications * Channels: Switchable between 2 channels or 4 channels. Power (at 8 Ohm): * 2-channel mode: approx. 40 to 43 watts per channel. * 4-channel mode: approx. 20 to 22 watts per channel. * Total harmonic distortion (THD): Extreme low with 0.008% in 2-channel mode (0.015% in 4-channel mode). * Signal-to-noise ratio: 120 dB (very quiet background). * Color: black. Tested and operational! Pictures are original and part of description what you see is what you get !