Kenwood KA-1500
A 30-watt integrated amplifier from the budget end of Kenwood's KA series.
Overview
The Kenwood KA-1500 is a plain integrated amplifier from the Japanese maker's big KA line. It was built for the buyer who wanted honest performance and didn't care about flagship power ratings. It is rated at 30 watts per channel into 8 ohms from 20Hz to 20kHz, which puts it in the budget tier of Kenwood's catalog. Budget here doesn't mean cheaply done. The design is solid-state and direct-coupled throughout, and the 0.5% total harmonic distortion at rated output is respectable for the class.
The front panel carries the essential tone controls - bass, treble, and balance - and nothing else cluttering the layout. It measures 400 x 130 x 300 mm and weighs 7.8 kg, so it's a compact, dense little box that feels more substantial than its price suggests. A large power transformer with an 8,800µF filter capacitor supplies the reserves. The all-silicon transistor complement reflects the era's move away from germanium devices.
Key Features
Direct-Coupled, All-Silicon Amplifier Stage
The output stage is direct-coupled. That eliminates the coupling capacitors that could roll off deep bass and muddy transients in earlier designs. Combined with the all-silicon transistors, the circuit keeps the 30W rating honest across the full 20Hz - 20kHz band. Frequency response is rated at 20Hz - 20kHz (±1dB).
Phono Stage for Moving Magnet Cartridges
The built-in phono preamp takes moving magnet cartridges. Input sensitivity is 2.5mV and load impedance is 47kΩ, which is what virtually every MM cartridge of the period was designed to see. For a budget integrated amp the phono section is competent and quiet, with a signal-to-noise ratio of 90dB. That keeps tape hiss and surface noise from being the limiting factor.
Power Supply with 8,800µF Reservoir
Kenwood didn't stint on the power supply. The large transformer feeds an 8,800µF filter capacitor bank, which gives the amplifier the current reserves to handle dynamic peaks without sagging.
Input and Output Flexibility
The rear panel has phono (MM), tuner, aux, and tape inputs, the standard sources of the era. Line input sensitivity is 150mV, so most tuners, tape decks, and CD players of the period will drive it to full output without strain. Two pairs of speaker terminals allow for bi-wiring or a second pair of speakers in another room. A headphone jack on the front panel covers private listening.
Historical Context
The KA-1500 was part of Kenwood's KA series of integrated amplifiers, marketed as a budget-oriented entry point into the brand. It was sold alongside the KT-1500 tuner as a matching component, giving buyers a visually consistent stack for a modest outlay. Kenwood, operating under the Trio name in some markets, built its reputation on serious engineering at accessible prices, and the KA-1500 fits that pattern. HiFi-Stereo (September 1990, p.133) noted in its advertising pages that high-end and hard-to-find components were increasingly the focus of the specialty market. That made straightforward budget amplifiers like the KA-1500 more appealing to people who just wanted to play records.
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.