KLH Model Twenty (1965)

A portable stereo hi-fi system combining phonograph, AM, and FM functionality, introduced in 1965

Overview

The KLH Model Twenty is a stereo music system manufactured in the United States and introduced in 1965. It integrates a phonograph, AM, and FM tuner into a single portable unit. The system features an all-transistor, direct-coupled amplifier conservatively rated at 40 watts IHF stereophonic music power. A variant, the KLH Model 20 Plus, is a 3-piece console consisting of a stereo record player with tuner, amplifier, and separate speakers, also released in 1965. The base Model Twenty was described as a newly developed, high-performance system at launch.

Specifications

Product type	stereo music system; portable stereo hi-fi system
Combined functionality	phonograph, AM and FM tuner
Amplifier type	all-transistor, direct-coupled
Rated power output	40 watts IHF stereophonic music power
Speaker design	two-way acoustic suspension
Woofer size	10″
Tweeter type	phenolic ring tweeter
Impedance	4 ohms

Design

The KLH Model Twenty uses a two-way acoustic suspension speaker design with a 10″ woofer and a phenolic ring tweeter. The amplifier is an all-transistor, direct-coupled design, integrated into the main unit.

Context

The KLH Model Twenty was marketed as a new, high-performance portable stereo system at its 1965 launch. It combined phonograph, AM, and FM functionality in a single unit, targeting listeners seeking a self-contained hi-fi experience. A user reported receiving a Model 20 new in 1968, indicating availability at least through the late 1960s.

Market

A KLH Model 20 Plus set sold for $825 in a July 2016 web auction, including Saarinen tulip stands. The system has appeared on eBay with descriptions noting rarity and working condition, and has been noted as a $20 marketplace find, reflecting variability in condition and completeness.