DIATONE DS-25B

Commentary

A bookshelf speaker system equipped with an orifice structure and mechanical filter.

A 25 cm cone type woofer is installed in the low range.
The frame of this unit uses a die-cast frame of approximately 1 kg with sufficient wall thickness to eliminate natural vibration of the frame and improve resolution.
The voice coil is equipped with a equipped with a damping ring made of special synthetic rubber, which works as a mechanical filter to improve the high-frequency characteristics and prevent mid-range loss.

A 5 cm cone type tweeter is installed in the high range.
A sub-frame with an orifice is installed in the chamber of this unit to provide acoustic braking, thereby eliminating transient deterioration due to reverberation and achieving clear sound quality with good resolution.
In addition, the cone has an effective vibration radius of 2 cm in order to maintain stable performance up to high frequencies, and a titanium diaphragm with excellent rigidity is adopted for the center cap, which improves high-end elongation, luster and realism.

Heat-resistant voice coils are used for the voice coil of each unit to improve the input resistance and increase the output sound pressure level.

It is equipped with 3-position switching type level control for high frequency.

The bass reflex system is used for the enclosure and the rectangular wooden duct is used for the bass reflex duct to reduce distortion. The edgeless structure removes the protruding edge around the baffle plate found in conventional speakers to improve directional characteristics, sound spread, and localization.
The internal structure is of a distributed resonance type. By arranging reinforcing bars in a non-uniform distributed manner, vibration of the enclosure itself is suppressed and resonance mode is dispersed to prevent box ringing.

Model Rating

Method	2-way, 2-speaker, Bass reflex, bookshelf type
Units Used	For low band : 25 cm cone type For high-pass : 5 cm cone type
Nominal impedance	6 Ω
Playback frequency band	45 Hz to 20 kHz
Crossover frequency	1.5kHz
Output sound pressure level	90dB/W
Max Input	60W
Level control	High Frequency : 3 positions (1.5 kHz to 20 kHz)
External dimensions	Width 320x Height 570x Depth 292 mm
Weight	13.5kg