PIONEER Brand Introduction: Pioneer Corporation is a renowned Japanese electronics brand, founded in 1938 and headquartered in Tokyo. The company is famous for producing high-quality audio equipment, covering home audio, car audio, and DJ equipment, and is one of the pioneers in the audio technology field. Product Description Brand and Model: Pioneer SE-305 Headphones (Japan) Year of Production: 1974 Country of Origin: Made in Japan Condition: Excellent overall condition Type: Closed-back dynamic headphone Driver: 45mm Frequency Response: 20 Hz – 20,000 Hz Impedance: 8 ohms Maximum Input Power: 500 milliwatts Sensitivity: Approx. 108 dB Distortion: Less than 1% Connector: 6.3mm stereo plug Cable: 5-meter spiral cable Weight: Approx. 435 grams