Sony APM-500 (1984–1985)
A compact bookshelf loudspeaker from Sony’s APM series, featuring planar drivers with aluminum honeycomb diaphragms.
Overview
The Sony APM-500 is a bookshelf loudspeaker system produced from 1984 to 1985. It was developed as a sister model to the APM-700, sharing design elements within Sony's APM speaker line. This two-way, two-driver system uses a bass-reflex enclosure and features unique planar-type drivers: a flat woofer and a planar tweeter, both employing aluminum honeycomb diaphragms. The speaker was manufactured in Japan and targeted listeners seeking high-fidelity sound in a compact form factor.
Specifications
| Type | 2-way, 2-driver, bass-reflex, bookshelf speaker |
| Frequency Response | 50 Hz to 20,000 Hz |
| Power Handling | 30 W (nominal) / 50 W (music) |
| Impedance | 6 Ω |
| Efficiency | 88 dB/W/m |
| Crossover Frequency | 2.2 kHz |
| Dimensions | 215 x 360 x 215 mm |
| Weight | 5.1 kg |
| Made in | Japan |
Design
The APM-500 features a bass-reflex enclosure and is equipped with a planar woofer and a planar tweeter, both using aluminum honeycomb diaphragms. It was developed as a sister machine to the APM-700, sharing core driver technology within the APM series.
Context
The APM-500 was part of a model line that included the APM-700, positioned as an accessible entry into Sony’s flat-membrane speaker technology. Described by users as a great budget option, it offered a way to experience the distinctive “Sony APM sound” in a compact bookshelf format.
Market
One unit was listed for sale at £47.50, and replacement foam edge rings are available from third-party suppliers. A service manual is also available, indicating ongoing collector and user interest.
eBay Listings
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