Pioneer PT-150
¥ 25,000 (around 1974)
¥ 27,500 (around 1978)
Commentary
Dome type tweeter which adopted beryllium diaphragm.
Newly developed beryllium diaphragm is used for the diaphragm.
Beryllium is a material that is extremely light and highly rigid. By using beryllium in the diaphragm, split vibration is suppressed, and flat characteristics up to 55 kHz, which greatly exceeds the audible band, and excellent transient characteristics are realized.
Model Rating
Type | Dome type tweeter |
Impedance | 8 Ω |
Frequency band | 2.5 kHz to 55 kHz |
Max Input | 40W |
Rated input | 20W |
Output sound pressure level | 91dB/W/m |
Crossover frequency | 2.5 kHz or More (at 12dB/oct.) 4 kHz or More (at 6dB/oct.) |
Air gap total flux | 26,500maxwell |
Air gap magnetic flux density | 13,300gauss |