Pioneer SE 505 (1973–1980)
A two-way dynamic stereo headphone from the 1970s with separate woofers and tweeters.
Overview
The Pioneer SE-505 is a two-way dynamic stereo headphone released between 1973 and 1980. Unlike conventional headphones of its era, it features dual drivers per earcup: 45mm woofers and 32mm tweeters, designed to deliver extended frequency response from 20 Hz to 20 kHz. It has an impedance of 8 Ω and a sensitivity of 108 dB at 0.3V, indicating high efficiency. The unit connects via a stereo jack and weighs 600 grams.
Specifications
| Type | Dynamic two-way |
| Driver size | 45 mm / 32 mm |
| Impedance | 8 Ω |
| Frequency response | 20 Hz to 20 kHz |
| Sensitivity | 108 dB / 0.3V |
| Weight | 600 g |
| Connections | Stereo jack |
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