Audio Database

The

DIATONE DS-25B
28,000yen(one set, the 1976 release)

Description
 
A die-casting frame with a weight of about 1kg which made wall thickness thick enough is adopted as a Woofer. Resolution was raised except for the natural frequency of a frame. Moreover, a voice coil is equipped with the dumpling made of the special synthetic rubber, a mechanical filter is worked, and the high region characteristic is improved. The inside sound omission is prevented.

In order to make internal reverberation small and to abolish the heterogeneity of reverberation time, the sub-frame which prepared the orifice in the chamber was attached to the chamber of a tweeter, and sound braking is applied to it.
Moreover, the effective oscillating radius of the corn was 2cm, and the diaphragm made from titanium which was excellent in composition is adopted as a center cap.

In an edgeless cabinet, a spread of directional characteristics and sound and the normal position are improved. Moreover, a reinforcement is distributed unevenly and vibration mode is decentralized. Resonance phenomena are prevented.


Rating of a mode
System A 2 way 2 speaker bass-reflex system and a book shelf type
Use unit For low-pitched sound: 25cm corn type
For loud sounds: 5cm corn type
Nominal impedance 6ohms
Play frequency band 45Hz - 20000Hz
Crossover frequency 1500Hz
Output sound pressure level 90dB/W
The maximum input 60W
Level control Loud sound: Three positions (1500Hz - 20000Hz)
Dimensions Width 320x height 570x depth of 292mm
Weight 13.5kg