Technics SB-310

Commentary

A dome unit speaker system with a European design.

A 25 cm cone woofer of high compliance type is installed in the low range.
This unit uses a soft urethane foam roll edge at the edge to improve linearity.

A 3.2 cm dome type tweeter is installed in the high range.
The diaphragm is made of corrosion-resistant aluminum alloy (50 μ thick, weight 0.1g) with high rigidity and light mass. It is driven by a large magnet (90 φ x37 φ x13mm) made of barium ferrite. Polyester is used as the insulating paint for the voice coil, and polyamide and phenol resin are used as the adhesive. By preventing the adhesive from softening due to the temperature rise of the voice coil, insulation is more complete.
In addition, a non-flammable plastic film is used for the voice coil bobbin to prevent deformation and burnout due to heat and greatly improve input resistance.

Equipped with 3-step switching type level control.
When this level control is set to the ATT-OFF position, the insertion impedance becomes 0.

The enclosure is hermetically sealed.

It is equipped with a connection terminal for multi-amplifier and can be driven by 2-way multi-amplifier system by switching the mode select switch.

Model Rating

Method	2-Way, 2-Speaker, Airtight Type, Bookshelf Type
Units Used	For low band : 25 cm cone type For High Range : 3.2 cm Dome Type (Unit Diameter 3.2 cm)
Playback frequency band	35 Hz to 20 kHz
Impedance	8 Ω
Output sound pressure level	90dB/W/m
Maximum allowable input	38W
Crossover frequency	1.3kHz
Level control	+ 3 db, Normal, -3dB Switching Type (With Off Switch)
External dimensions	Width 322x Height 568x Depth 302 mm
Weight	13.5kg