Audio Database

The

DIATONE DS-90C
190,000yen(one set, the 1977 release)

Description
 
It is the high-class floor type speaker system which concentrated the know-how accumulated by the technology of those days and old production of a speaker of the Diatone, and was completed.

tThe Woofer of DS-90C sandwiched the honeycomb core made to the large caliber Woofer of 40cm with the thin board of aluminum with the skin of GFRP, and the honey cam corn fabricated as a diaphragm is used for it.
An air layer occupies about 90% of the whole diaphragm, weight versus an intensity ratio and a weight pair rigidity ratio are large, are suitable for the diaphragm of the Woofer, and heavy low-pitched sound with the elongation which suppressed distortion is reproduced.

To the squawker, each units, such as a voice coil which was excellent in the corn paper from which it kept choosing examination in piles at crossing edge with moderate visco-elasticity and input-proof nature, and a strong die-casting frame of structure, are developing detailed measurement and listening comprehension test in piles.

By making an effective oscillating radius small as much as possible, a tweeter lengthens the diaphragm of a piston, lessens division vibration, and is pressing down distorted generating.

The low distorted magnetism circuit which equipped the Woofer and the squawker with the low distorted ring (FN ring) at the magnetic pole cavity part, and suppressed a nonlinear distortion is adopted.

It fixed to the strong 10-mm-thick baffle plate made from die casting firmly, and the squawker and the tweeter have prevented the harmful cavernous vibration.

Distributed vibration type reinforcement structure was given and the large-sized enclosure of the content volume 206L stubbornly fixed with elaborate woodwork technology is adopted as a joint. Moreover, the bass-reflex duct adopted the triangle duct and has prevented the vibration inside a duct, and generating of the standing-wave inside a cabinet.


Rating of a mode
System 3 ways, 3 speaker bass-reflex system, and a floor type
Use unit For low-pitched sound: 40cm honey cam corn type
For inside sound: 16cm corn type
For loud sounds: 5cm corn type
Rated impedance 8ohms
Play frequency band 20Hz - 20000Hz
Output sound pressure level 95dB/W/m
Crossover frequency 350Hz, 3500Hz
The maximum input 100W(EIAJ)
Level control Inside sound: Five positions (350Hz - 3500Hz)
Loud sound: Five positions (3500Hz - 20000Hz)
Dimensions Width 570x height 1075x depth of 480mm
Weight 75kg