Audio Database

The

DIATONE DS-31CmkII 48,000yen(one set, the 1970 release)
58,000yen(one-set, around the 1976 time)

Description
 
It is the floor type speaker system which adopted the dabbled live system.

It is a unique design [ say / making reproducing characteristics equalize ] by carrying out the parallel drive of the aperture of 30cm, and the 20cm corn type unit low-pass, and raising radiant efficiency, and also changing an aperture.
The heavy low-pitched sound play is enabled by adjusting tuning of two Woofers.

The corn type unit (30cm and 20cm) is adopted as low-pass. The characteristic improvement is aimed at by the thing which will raise radiant efficiency by carrying out the parallel drive of these units, and also will carry out two kinds of sizes and to do.
Two of these have been arranged perpendicularly and a spread in stereophonic reproduction is improved.

The 3cm corn type unit which uses an aluminum alloy molding board is adopted as a super-high region.

The level control of the step type which can change a level to a three-stage in 2000Hz - 25000Hz is carried in the front.

Internal

Rating of a mode
System 3 ways, 5 speakers, a sealing system, and a floor type
Use unit etc.
For low-pass : 30cm corn type
20cm corn type
For high regions: 5cm corn type x2
For high [ super-] regions: 3cm corn type
Rated impedance 4ohms
Play frequency band 30Hz - 25000Hz
The maximum input 40W
Crossover frequency 2000Hz, 10000Hz
Output sound pressure level 94 dB/W (new JIS)
Level control Three positions
Dimensions Width 490x height 800x depth of 340mm
Weight 24.8kg