This is a fantastic opportunity to own a beautifully preserved Yamaha EQ-550 graphic equalizer in outstanding cosmetic and working condition. Built during Yamaha’s golden era of hi-fi, this unit delivers clean, musical sound and precise tonal control — a true classic for any serious audio enthusiast. With its 10-band stereo equalization, you can finely tune your system to match your room, speakers, and personal taste. All sliders move smoothly, all buttons respond perfectly, and every input and output has been tested. This unit has been carefully maintained and comes from a smoke-free environment. Technical Specifications: Type: Stereo graphic equalizer Bands: 10 band per channel Frequency response: 10 Hz – 50 kHz Signal-to-noise ratio: approx. 100 dB Total harmonic distortion: ≤ 0.005% Connections: RCA line in/out Power supply: AC 220–240V (EU) Manufacturing period: Early 1990s Condition: Excellent Functionality: Fully tested and working Cosmetics: Very clean with minor scratches on chassi