KLH Model Five (1968)

A compact two-way bookshelf speaker using acoustic suspension technology, introduced in 1968.

Overview

The KLH Model Five is a compact two-way bookshelf speaker introduced in 1968 by KLH of Cambridge, Massachusetts. It features an 8-inch woofer and an acoustic suspension cabinet, delivering surprising bass extension and clarity for its size. Designed for high-fidelity audio performance in a space-efficient format, the Model Five became one of the best-selling hi-fi speakers of its era—and later, of all time. Its combination of affordability and sound quality made high-fidelity audio accessible to a generation of music lovers.

Specifications

Product type	compact two-way bookshelf speaker
Woofer	8-inch woofer
Cabinet type	acoustic suspension cabinet
Bass control settings	-1.5dB and -3.0dB

Design

The Model Five uses an acoustic suspension cabinet and a two-way driver configuration with a built-in crossover. The enclosure is compact, optimized for bookshelf placement, and includes a bass control with selectable -1.5dB and -3.0dB settings. Owners have reported recapping the crossovers during restoration, confirming their presence and serviceability.

Context

The Model Five was part of KLH’s lineup of legendary products, alongside the Model Six (1960) and Model Eight (1963). It became one of the best-selling hi-fi speakers of its era due to its balance of performance and affordability. Its success helped expand access to high-fidelity sound during a pivotal period in consumer audio.

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