Technics SB-400

Commentary

A speaker system designed to improve directional and transient characteristics under the theme of multi-seller horn.

A 25 cm cone woofer of high compliance type is installed in the low range.
The edge of this unit is non-directional and has the advantage of light weight. It is made of urethane with discontinuous bubbles. Moreover, it is formed into a convex shape opposite to the conventional concave edge to improve input resistance and linearity.

The middle area is equipped with a horn type squaker.
The horn section is an 8-cell type multi-seller horn. By dividing the inside of the horn into upper, lower, left and right cells, the directivity, which is a problem with horn types, is improved.
In addition, a hard duralumin diaphragm is used for the diaphragm to achieve low distortion and improved transient characteristics.

A horn type tweeter using a 6-cell multi-seller horn is installed in the high frequency range.

Equipped with independent attenuators for each of the mid-range and high-range regions, it can be switched to 3 stages.

The enclosure is hermetically sealed and has a Oceania cheeks oil finish on the exterior.

Equipped with a multi-amplifier terminal, 2-way / 3-way multi-amplifier drive is possible by switching the mode switch.

Model Rating

Method	3-Way, 3-Speaker, Airtight Type, Bookshelf Type
Units Used	For low band : 25 cm cone type For Middle Range : Horn Type For High Frequency : Horn Type
Playback frequency band	35 Hz to 20000 Hz
Impedance	8 Ω
Output sound pressure level	93dB/W/m
Allowable input	38W
Crossover frequency	650 Hz, 6000 Hz
Level control	For Middle Range : + 3 ~ 0 ~ -3dB (Equipped with OFF Switch) For High Frequency : + 3 ~ 0 ~ -3dB (with OFF switch)
External dimensions	Width 316x Height 590x Depth 300 mm
Weight	12kg