The back of the picture is SC 403.

Commentary

This speaker system is the smallest model of the 400 series.

In the conventional design method of speaker systems, it is an orthodox method to raise the average sound pressure in the general mid-range by 2 to 5 dB. The shortage of the low-range has been compensated by the bass reflex effect. As a result, the sound quality was attractive when compared at the store, but sometimes it became audible when you brought it to your home for a long time.
The 400 Series is designed to provide rich and natural playback sound even if you listen to it for a long period of time by setting the average sound pressure to 3 to 4 dB lower than that of conventional orthodox speakers, in addition to making the low-frequency to high-frequency flat characteristics.
In addition, through a technical tie-up with bozak Co., Ltd., we have conducted repeated research on the materials and sound quality of bozak speaker corn paper. Based on the results of this research, we have adopted a speaker unit that uses a unique method and determined the degree of mixing and mass.

It has a 20 cm cone woofer in the low range and a 12 cm cone squaker in the middle range.
A horn type tweeter is installed in the high-frequency range.

A full-scale LC-type network is used in the network section.
In addition, it is equipped with a tone selector, and the sound quality can be adjusted in 4 stages.

Homogen material is used for the enclosure, the internal structure is hermetically sealed, and the exterior has a walnut urethane finish.
The speaker enclosure is designed to be separated from the base, so that it can be installed vertically or horizontally, and can also be used as a bookshelf without the base.

By combining the 400 Series and the Matching SR Series cabinets, you can use them with the same dimensions as a stereo set.

Model Rating

Method	3-way, 3-speaker, Sealed Type, Floor / Bookshelf Type
Unit	For low band : 20 cm cone type For Medium Range : 12 cm cone type For High Frequency : Horn Type
Playback frequency band	40 Hz to 20 kHz
Instantaneous maximum input	20W
Impedance	8 Ω
Crossover frequency	1.5 kHz, 5 kHz
Network	LC Type, 6dB/oct.
Tone control	4-step switching system Clear : Sound with a slight emphasis on the high range Normal : Ideal Hi-Fi sound Sweet : High-frequency attenuation Soft : Sound with a slight attenuation in the middle and high range
External dimensions	Body Only : Width 445x Height 645x Depth 445 mm With Stand : Width 445x Height 730x Depth 445 mm
Weight	20kg