We tackled a theme on how good quality low range could be reproduced from our new small system sized 32D x 35W x 63H cm. For that, we adopted a different conception for driver unit. Diameter was determined to be 18cm, magnetic circuit was improved, voice coil was made on KSL idea, and paper diaphragm was reinforced. Enclosure was assumed by Tatematsu Onko. All these turned to an outstanding performance in sound quality as well as frequency response.

M18 full range driver
An enclosure structured of a musical instrument has been prepared for dynamic speakers and system which are just like live fossils coelacanths. A completely different idea has been brought to apparently orthodox looking speakers. For example the voice coil is made to KSL configuration, which drastically improved to 'real' sounds with 'relaxing low frequencies' and much less distortion.

The key in magnetic circuit of the M-18 driver is in how 'ferrous' portion is reduced. 99.99% pure iron minimally used is hydrogen anyl processed after precisely lathed. Magnetic pole is a - very costly Fe-Co alloy Permendure to prevent from magnetic saturation around the center pole and achieve reproduction of 'relaxing sounds'. Further, alnico magnets are used for the center and exterior for the first time in the world, as it has 5 times higher permeability than ferrite magnet and its u. linearity within small magnetic field is better than iron. This results in reductions of sound worsening factors derived from reversed power generation.

SPECIFICATIONS 18cm Full Range Driver + KSL-M1 dome tweeter fo=35Hz 18000 gauss weight: approx. 20kg Size: 32D x 35W x 63H c.m.

The English has been retained from the original Japanese English web site.

What are the charms of a full range speaker? Can it express every sort of instrument with a single diaphragm? Engineers long challenged this theme throughout the history of speakers. Once they knew it was impossible, they apparently developed discrete speakers for bass, mid and treble, but at the same time created a new problem. That was unnaturalness in synthesis of wave forms due to disordered electrical phase around crossover frequency. In other words, 'sound changed.' Then, when they avoided such and returned to full range configuration, they could not find speakers that could satisfy 'sound' factors.

A full range type has been a product of compromise for structure and production reasons, and has been introduced as beginners' rig spending less cost therein. People with positive thinking who always pursue something cannot be satisfied with it.

We have therefore transplanted our technologies long cultivated through engineering of horn speakers and know-how to have developed from amplifiers to MC phono cartridges to the 20SP driver. The 20SP proudly features not only conventional technique using gigantic Alnico magnet and Permendure material but also concealed unique diaphragm structure, which is not just 'paper' made but relies on other factor than paper rigidity. This new invention has entirely changed the sound of conventional full range type, to satisfy audio gourmet, too.

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SPECIFICATIONS Drivers 20SP 20cm full range 5T 5cm tweeter Frequency 40Hz ~ 20,000Hz Power Output Music power 30W Silver voice coil and silver capacitor Size 450W x 550H x 350D mm

The English has been retained from the original Japanese English web site.