National/Technics SB-45

Commentary

This floor type speaker system was announced as the top-of-the-line model of a thin floor type.

A 30 cm cone type woofer is installed in the low range.
The cone paper uses a material with high internal loss and high Young's modulus. In addition, low distortion is achieved by using a roll edge molded with special cloth.

Equipped with 12 cm cone type skoker in the middle area.
A large magnet is used for the magnetic circuit, and low distortion is achieved by using a high efficiency unit at a lower level.

A horn type tweeter is installed in the high frequency range.
A lightweight and rigid polyester film is used for the diaphragm to reduce the weight of the vibration system.

Equipped with 3 levels of skoker and 2 levels of tweeter tap-type level control.

The enclosure is hermetically sealed.

Model Rating

Method	3-Way, 3-Speaker, Airtight System, Floor Type
Units Used	For low band : 30 cm cone type For Medium Range : 12 cm cone type For High Frequency : 5 cm Horn Type
Playback frequency band	30 Hz to 20 kHz
Impedance	8 Ω
Output sound pressure level	100dB(1kHz)
Max Input	30W
Crossover frequency	1 kHz, 5 kHz
External dimensions	Width 583x Height 670x Depth 230 mm
Weight	15.5kg