Audio Database

The

DIATONE DS-70C
130,000yen(one set, the 1978 release)

Description
 
The first honey cam corn to put in practical use with 4S-4002P type in a 33cm Woofer is adopted as low-pass.
An air layer occupies the whole 90% of diaphragm order, and is rich in rigidity by the low-mass. Especially, since weight versus an intensity ratio and the weight pair rigidity ratio are very large compared with other diaphragms, it excels as a diaphragm material of a Woofer.

A squawker adopts the corn type of 12cm designed newly. Strong fabrication is given so that a bass-reflex system may be matched.

GFRP of a conical dome is adopted as the diaphragm of a tweeter, and the piston vibration region is lengthened.

Moreover, the low distorted magnetism circuit was adopted as the Woofer and the squawker, and nonlinear distortion is improved.
And it carried out by having repeated the physical test and the listening comprehension test, and the network circuit which fully developed examination in piles is adopted as a network from the material of a coil and a capacitor to the composition of winding wire or a circuit.

The twin triangle duct which divided the rectangular port aslant and prevented generating of standing-wave is used for a bass-reflex duct. The resonance of the port is pressed down.


Rating of a mode
System 3 ways, 3 speaker bass-reflex system, and a floor type
Use unit For low-pitched sound: 33cm honey cam corn type
For inside sound: 12cm corn type
For loud sounds: 4cm semi dome shape
Rated impedance 8ohms
Play frequency band 25Hz - 20000Hz
Output sound pressure level 92dB/W/m
Crossover frequency 500Hz, 5000Hz
The maximum input 80W(EIAJ)
Level control Inside sound: Four positions (500Hz - 5000Hz)
Loud sound: Four positions (5000Hz - 20000Hz)
Dimensions Width 470x height 930x depth of 397mm
Weight 49kg