Pioneer AS-252
¥ 18,000 (1 unit, around 1975)
Commentary
A 3-way speaker system kit that combines 25 cm woofer, mid-range dome and tweeter.
A 25 cm cone type woofer is used for the low range.
This unit uses a 110 φ mm ferrite magnet for the magnetic circuit, a copper cap for the pole to reduce distortion, and a heat-resistant aluminum plate for the voice coil bobbin to improve input resistance.
The mid-range uses a 4.8 cm dome type mid-range.
Hard duralumin of 40 μ thickness is used for the diaphragm, and the compliance of the vibration system is increased by holding it with polyurethane foam.
A 2.6 cm dome type tweeter is used for the high range.
A dome type diaphragm using 50 μ m thick aluminum evaporated foil is adopted for the diaphragm, and directional characteristics in the high frequency range are improved by the shape of the dome and the effect of special fins.
A network with level control for middle and high frequencies is included.
The AS 252 can be used as a speaker system by combining the Enclosure Kit AE 250 and the dedicated baffle EB 252.
Model Rating
Type | 3-way speaker system kit |
Kit part | 25 cm Cone Woofer 4.8 cm Dome Mid Range 2.6 cm Dome Type Tweeter Network with Level Control Other |
<Characteristics of AS-252 + AE-250 + EB-252> | |
Cabinet type | Closed type |
Impedance | 8 Ω |
Frequency characteristic | 40 Hz to 20 kHz |
Output sound pressure level | 89dB/W |
Max Input | 40W |
Crossover frequency | 900 Hz, 6 kHz |
Weight | 15.8kg |