DIATONE DS-31CmkII
¥ 48,000 (1 unit, released in 1970)
¥ 58,000 (1 unit, around 1976)
Commentary
A floor-type speaker system that employs a double-drive system using two units.
A 30 cm cone type woofer and a 20 cm cone type woofer are installed in the low range.
These units use a double-drive system, which improves radiation efficiency by driving them in parallel, and achieves uniform playback characteristics by varying the aperture. In addition, by adjusting the tuning of two woofers, it is possible to play back low-pitched sound with good damping and smooth medium / low-pitched sound.
Two 5 cm cone type tweeters are installed in the high range.
This unit is a mechanical load type and is mechanically braked by a special synthetic rubber suspension to obtain good sound quality.
In addition, by arranging two tweeter units vertically, sound spread in stereo playback is improved.
A 3 cm cone type super tweeter is installed in the super high range.
Aluminum alloy molded plate is used for the diaphragm, and it is responsible for the ultra-high frequency range of 10 khz or more.
The front baffle has a level control that can change the level from 2 kHz to 25 kHz in three levels.
The enclosure is hermetically sealed.
The exterior is a walnut finish, the front baffle is also made of wood pattern veneer, and the front grill is made of double shear RUNNET, giving it a classy look.
Model Rating
Method | 3-Way, 5-Speaker, Sealed System, Floor Type |
Units used, etc. | For low band : 30 cm cone type 20 cm corn mold For High Pass : 5 cm cone x2 For Super High Range : 3 cm Cone Type |
Rated impedance | 4 Ω |
Playback frequency band | 30 Hz to 25 kHz |
Max Input | 40W |
Crossover frequency | 2 kHz, 10 kHz |
Network | Low frequency : -12dB/oct. High frequency : 12dB/oct Very High Frequency : 6dB/oct |
Output sound pressure level | 94dB/W (New JIS) 100dB/VA |
Level control | 2 kHz to 25 kHz, 3 positions |
External dimensions | Width 490x Height 800x Depth 340 mm |
Weight | 24.8kg |