Kenwood LS-770A (ca. 1986)

A magnetically shielded bookshelf speaker with a double voice coil woofer and an ion-plated titanium tweeter

Overview

The Kenwood LS-770A is a 3-way, 3-speaker bass-reflex bookshelf system made around 1986. It is magnetically shielded, so it can sit near video displays. Kenwood built it for extended low-frequency response and high-resolution sound, using engineering from its LS series.

Specifications

Playback frequency band	33 Hz to 40 kHz
Max Input	150W (EIAJ)
Impedance	6 Ω
Output sound pressure level	approximately 92dB/W/m
Crossover frequency	approximately 900 Hz, 4 kHz
External dimensions	Width 280 x Height 510 x Depth 261 mm
Weight	11.5kg
Woofer	22 cm cone type with double voice coil
Midrange	approximately 7.5 cm Semi-dome Type
Tweeter	2.5 cm dome type with ion-plated titanium diaphragm

Design

The woofer uses double voice coil technology. Two-stage magnets of opposite polarity and a reversed current connection give it strong, controlled drive and lower distortion. It reportedly has a new HR carbon diaphragm and class A suspension, for better durability and linearity. The woofer edge is a push-pull tangential design, which helps under dynamic loads. The midrange unit is reportedly magnetically shielded, and an acoustic level control adjusts the tone.

Product Family

The LS-770A is a compact speaker system that uses technologies from the broader Kenwood LS series in a bookshelf format.

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