For sale: Pioneer SE-550 headphones. 1980s, Japan. Foam is selected to match the original in sound and comfort. Cups are a combination of aluminum and plastic. 6.3 jack. Technical specifications: 22 Ohm, 103dB, 230 grams, 38 micron polyester film, 50mm dome type speaker, max input 1000 mW (per driver), frequency response 20-20,000, 3 meter cable. Sound: Flat tone with light bass and sub-boost. Well suited for working with a turntable and today. Or just enjoy the music