Audio Database

The

DIATONE DS-251mkII
28,500yen(one set, the 1973 release)

Description
 
It is the speaker system which added improvement based on DS-251 and was made.

A 25cm [ which adopted the aluminum die-casting frame with a wall thickness of 4mm as low-pass, and raised intensity ] corn type unit is adopted.
Corn paper is using the tough thing so that the internal sound pressure of an acoustic air suspension may be borne.

A 5cm corn type unit is adopted as a high region.

A 3cm corn type unit is adopted as the super-high region.
This unit has adopted 70micro in thickness of hard aluminum at effective oscillating 1.2cm in radius, and is finished with a precision press.

The cabinet has adopted the full-scale acoustic air suspension system which uses a strong cabinet, and has improved a low-pass transient and distortion.
Moreover, directivity is also improving by considering it as the edgeless cabinet which took the edge of the baffle-plate circumference.
Moreover, the stainless steel pipe is used for a saran network.

The thing of a stepper type is adopted as a level control, and three-stage up-and-down 3dB in width arranges a high region of 2000Hz or more.
Moreover, ON/OFF of a super tweeter is possible.

Internal

Rating of a mode
System 3 ways and 3 speaker acoustic air suspension system
- Book shelf type
Use unit etc. For low-pass: 25cm corn type
For high regions: 5cm corn type
For high [ super-] regions: 3cm corn type
Rated impedance 8ohms
Play frequency band 40Hz - 25000Hz
Output sound pressure level 91dB/W
Crossover frequency 2000Hz, 10000Hz
Level control Step type 3 position (3dB)
The maximum input 40W
Dimensions Width 315x height 525x depth of 240mm
Weight 12kg