Audio Database

The

DIATONE DS-40C
68,000yen(one set, the 1976 release)

Description
 
The low distorted magnetism circuit adopted also as DS-90C is adopted as a Woofer. The nonlinear distortion of the drive system generated from a magnetic circuit is improved, and resolution is raised.
A strong die-casting frame is adopted as a frame, and it is being firmly fixed to the baffle plate with eight bolts, and is a carved corn with loose on corn paper entering corrugation,The high region characteristic of a Woofer is improved with a kind of mechanical filter which equipped the voice coil with the dumpling made of the special synthetic rubber.
Moreover, linearity adopted the exotic material which was well excellent in permeability, and edge mixed thermosetting resin and visco-elasticity resin to the Spider (damper), used the crossing edge coated in several steps for it, and has performed special dumping processing to it from it.

The effective oscillating radius of corn paper makes the tweeter as small as possible in order to acquire the directivity which was excellent to the highest compass. Moreover, a piston vibration region is also lengthened as much as possible, division vibration is lessened, distorted generating is suppressed, and Tran Gent is improved. In order to enlarge an allowable input simultaneously with it, the diameter of a voice coil is enlarged.
The center dome was made into the cone, has improved the characteristic, and also suppressed the natural frequency of the diaphragm.
Furthermore, the reverberation in a chamber was controlled and Tran Gent's aggravation is prevented.


Rating of a mode
System 2 ways, 2 speaker bass-reflex system, and a floor type
Use unit For low-pitched sound: 30cm corn type
For loud sounds: 5cm semi dome shape
Rated impedance 8ohms
Play frequency band 30Hz - 20000Hz
Output sound pressure level 92dB/W/m
Crossover frequency 1500Hz
Level control Loud sound: Three positions (1500Hz - 20000Hz)
The maximum input 80W(EIAJ)
Dimensions Width 395x height 840x depth of 405mm
Weight 32kg