Pioneer PT-R7
¥ 38,000 (around 1974)
¥ 41,800 (around 1978)
Commentary
A tweeter that uses a ribbon shape.
It uses a ribbon-type structure that vibrates by supplying current directly to a vibrating foil placed in a magnetic flux.
The entire 9 μ m ultra-thin vibrating foil is driven to achieve flat and smooth frequency characteristics up to 100 kHz.
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Model Rating
| Type | Ribbon type tweeter |
| Impedance | 8 Ω |
| Frequency band | 4.5 kHz to 100 kHz |
| Max Input | 40W |
| Rated input | 20W |
| Output sound pressure level | 95dB/W/m |
| Crossover frequency | 4.5 kHz or more |
| Harmonic distortion factor | 1% or Less (1W, 4 kHz or More) |
| External dimensions | 94 mm wide x 77 mm high x 161 mm deep |
| Weight | 2.8kg |