Heathkit AS-101 (1960s)
A 1960s kit speaker system housing Altec Valencia 846-A components, known for high sensitivity and horn-loaded efficiency.
Overview
The Heathkit AS-101 is a speaker system from the 1960s, sold as a kit with the same core components as the Altec Lansing Valencia 846-A. It uses Altec 811B horns and 401-105 drivers in a horn-loaded design. Frequency range is 40-22,000 Hz, sensitivity is 90 dB, and nominal impedance is 4 ohm. One owner noted that later versions may have used 8 ohm 416-8A drivers, so there was possibly a change during production. It was marketed as a high-performance, build-it-yourself alternative to the factory-built Valencia. Users report excellent sound when a unit is maintained or restored to original condition.
Design
The AS-101 puts Altec Lansing Valencia 846-A internals in a Heathkit-branded enclosure, assembled by the user from a kit. It has a bi-amp crossover network. Modifications to that circuit have been reported to affect impedance and performance. Some units include stiff L-pads, which become a problem over time. Owners have restored modified crossovers or replaced drivers to get back to the original sound.
Market
Heathkit AS-101 speakers are considered rare today. Recent asking prices run from $300 to $1,500, and one example was listed at $1,499 in May 2026. Common issues are degraded crossovers and stiff L-pads, and some units have been altered from their original configuration. Original documentation is scarce. Service manuals and parts lists have not been located.
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