DIATONE DS-73D

Commentary

This is a speaker system that is compatible with digital sources by introducing unique new technology into each unit.

A 32 cm cone type woofer is installed in the low range.
The diaphragm is made of a Polykraft honeycomb construction cone. A skin material made by impregnating a special resin into paper pulp and a resin-impregnated Polykraft honeycomb core are joined together with a polyamide adhesive. As a result, the diaphragm has a high specific elastic modulus of 4 times that of paper and 11 times that of polypropylene. It also has a 20% higher internal loss than that of paper. In addition, the strain caused by split vibration is greatly reduced.
A low-distortion magnetic circuit is adopted for the magnetic circuit, and the distortion generated from the drive system is eliminated by installing a low-distortion ring.

The mid-range is equipped with a 10 cm cone type squaker.
The diaphragm is made of C. F. P. Cone, an acoustic material developed by Diatone using its proprietary technology. At C. F. P., polypropylene with high internal loss is reinforced with highly rigid carbon fiber, and the material is injection-molded using its proprietary molding technology to achieve a diaphragm with particularly high material uniformity.
In addition, the center cap is made of low-mass, high-hardness ω - titanium to improve high-frequency characteristics.

A 2.5 cm dome type tweeter is installed in the high range.
A D. U. D. ω - titanium diaphragm is used for the diaphragm. The surface of the titanium diaphragm is hardened in a special atmosphere to increase the specific elastic modulus. The ω - titanium diaphragm is made into a D. U. D structure that integrates the voice coil bobbin with the diaphragm to improve various characteristics such as wide band, reduction of transmission loss, high-frequency attenuation characteristics, good linearity, and input resistance.

The network circuit is designed to reduce distortion by examining the materials. In addition, the crimping wiring method using OFC with low DC resistance is adopted for all connections.

The mid-range and high-range are equipped with level controls.
This level control uses a circuit configuration that enables direct connection at 0 points.

The front baffle has a symmetrical unit arrangement to improve sound image localization.
The enclosure uses a distributed resonance structure to disperse for the enclosure, and the box ringing phenomenon is prevented by dispersing the resonance mode.

Model Rating

Method	3-Way, 3-Speaker, Airtight Type, Bookshelf Type
Units Used	For low band : 32 cm cone type For Medium Range : 10 cm Cone Type For high-pass : 2.5 cm dome type
Nominal impedance	6 Ω
Playback frequency band	35 Hz to 30 kHz
Output sound pressure level	91dB/W/m
Crossover frequency	600 Hz, 5 kHz
Level control	Mid-range : 3 positions (600 Hz to 5 kHz) High frequency : 3 positions (5 kHz to 30 kHz)
Max Input	80W
External dimensions	Width 370x Height 680x Depth 330 mm
Weight	21kg