DIATONE DS-40C

Commentary

A floor-type speaker system with low distortion and improved resolution.

A 30 cm cone type woofer is installed in the low range.
The cone paper uses a loose curved cone with corrugation. A kind of mechanical filter with a special synthetic rubber damping attached to the voice coil improves the high-frequency characteristics and prevents the mid-frequency range from falling out.
The damper is made of a new material with good linearity and excellent breathability, and the edge is made of Cross Edge. Thermosetting and viscoelastic resins are mixed and coated several times, and a special damping treatment is applied on top of that.
A low-distortion magnetic circuit is adopted for the magnetic circuit, and resolution is improved by improving non-linear distortion of the drive system generated from the magnetic circuit.
Solid die-cast frame is used for the frame part, and it is firmly fixed to the baffle plate with 8 bolts.

A 5 cm semi-dome type tweeter is installed in the high range.
In order to obtain excellent directional characteristics up to the maximum sound range, the effective vibration radius of the cone paper is designed to be as small as possible. In addition, the piston vibration range is also extended as much as possible to suppress distortion and improve transients. The voice coil diameter is designed to be large to increase the allowable input.
The center dome has a conical shape to improve the characteristics and suppress the natural vibration of the diaphragm. The elliptical shape of the chamber controls the reverberation in the chamber and prevents the deterioration of transients.
A die-cast frame with precision machining accuracy is adopted for the frame, and harmful natural vibration is removed.

The enclosure uses a bass reflex system. The bass reflex duct uses a rectangular wooden duct, which is firmly assembled with baffle plates to reduce noise pollution caused by resonance of the duct.
The interior of the enclosure is reinforced with a distributed resonance structure, an airtight structure with special attention to air leakage, and an arrangement of sound absorbing materials.

Model Rating

Method	2-Way, 2-Speaker, Bass Reflex System, Floor Type
Units Used	For low band : 30 cm cone type For High Range : 5 cm Semi-dome Type
Rated impedance	8 Ω
Playback frequency band	30 Hz to 20 kHz
Output sound pressure level	92dB/W/m
Crossover frequency	1.5kHz
Level control	High Frequency : 3 positions (1.5 kHz to 20 kHz)
Max Input	80W(EIAJ)
External dimensions	Width 395x Height 840x Depth 405 mm
Weight	32kg