Yamaha R-50 Natural Sound Stereo Receiver (1983-1985) General Description The Yamaha R-50 is a sophisticated "Natural Sound" stereo receiver from the early 1980s, a period when Yamaha dominated the market with its ultra-low distortion circuitry and minimalist aesthetic. This model is highly regarded for its clean, transparent audio reproduction and its innovative digital quartz-locked tuning system. Technical Specifications • Power Output: 35 watts per canal into \bm{8 \Omega} (stereo) • Frequency Response: \bm{10Hz} to \bm{30kHz} • Total Harmonic Distortion (THD): \bm{0.015\%} (providing exceptional sonic clarity) • Damping Factor: 50 • Input Sensitivity: \bm{2.5mV} (MM Phono), \bm{120mV} (Line) • Signal to Noise Ratio: \bm{88dB} (MM), \bm{100dB} (Line) • Channel Separation: \bm{55dB} • Dimensions: \bm{435 \times 105 \times 330} mm • Weight: \bm{6.3} kg Key Features & Connectivity • Variable Loudness Control: Yamaha’s signature feature that allows you to maintain a full-frequency balance even at low listening volumes. • Inputs: Phono (Turntable), CD/Aux, Video/Tape 1, and Tape 2 (Monitor). • Speaker Outputs: Terminals for two pairs of speakers (A, B, or A+B). • Digital Tuner: Quartz-locked synthesizer tuning for FM/AM with 10 programmable presets. • Display: Clear digital frequency readout with a multi-segment LED signal strength meter. The Yamaha R-50 is a perfect choice for audiophiles looking for the "Natural Sound" heritage in a compact and reliable format. Its low THD and high signal-to-noise ratio make it stand out among other receivers in its class. The unit is in excellent working condition, all lights and buttons function correctly. Minor traces of use, please see photos for a detailed impression.