DIATONE DS-57HRV

Commentary

A bookshelf type speaker system that pursues the concept of high rigidity.

A 22 cm cone type woofer is installed in the low range.
R. I. (radial injection) carbon cone is used for the diaphragm of this unit, and the ideal diaphragm shape is realized by radial molding of high rigidity carbon fiber mixed resin.

A 3 cm dome type skoker is installed in the middle area.
Boron diaphragm is used as diaphragm material, and D. U. D structure integrating diaphragm and voice coil bobbin improves rise response, input resistance, and frequency characteristics.
In addition, the D. M. (direct mount) system has been adopted for the frame structure. The plate part of the magnetic circuit is made into a mount plate for an integrated structure with the frame, and the magnetic circuit is mounted directly in the enclosure.

A 1.6 cm dome type tweeter is installed in the high range.
This unit uses an S. R. titanium diaphragm, and surface hardening treatment of the titanium suppresses the natural sound which makes the sound muddy.

Full-scale large input terminal is adopted.

The enclosure uses a rear bass reflex system.
In addition, the 4-side round baffle with the four corners of the front baffle in a round shape suppresses the diffraction phenomenon of sound waves in the front baffle.

There was a special speaker stand sold separately.

Model Rating

Method	3-Way, 3-Speaker, Bass reflex system, Bookshelf Type Magnetic Shielding Design (EIAJ)
Units Used	For low band : 22 cm cone type For Middle Area : 3 cm Dome Type For high-pass : 1.6 cm dome type
Nominal impedance	6 Ω
Playback frequency band	42 Hz to 30 kHz
Output sound pressure level	90dB/W/m
Crossover frequency	1.5 kHz, 10 kHz
Max Input	150W(EIAJ)
External dimensions	Width 285x Height 520x Depth 258 mm
Weight	12.0kg
Attachment	OFC speaker cable
Speaker Stand DK-55 (WN) (2 in 1 set, ¥ 18,000) (sold separately)
External dimensions	Width 270x Height 300x Depth 290 mm
Weight	4.0kg