Sony APM 550AV
A compact bookshelf speaker system from Sony, designed for high-fidelity audio with anti-magnetic construction and built-in protection circuitry.
Overview
The Sony APM 550AV is a bookshelf-type speaker system manufactured by Sony. Identified across multiple sources by its exact model name, it was originally priced at ¥19,500 around 1986. Designed as a 2-way, 2-speaker bass reflex system, it features anti-magnetic construction to reduce interference in audio and video environments. The system includes a built-in automatic recovery type protection circuit to safeguard against overload.
Specifications
| Model Rating Method | 2-Way, 2-Speaker, Bass Reflex System, Bookshelf Type, Anti-Magnetic Type |
| Unit For low band | 144 cm² Plane type |
| Unit For high pass | 6 cm cone type |
| Playback frequency band | 50 Hz to 20000 Hz |
| Output sound pressure level | 89dB/W/m |
| Maximum instantaneous input level | 100W |
| Rated input level | 50W |
| External dimensions | Width 250x Height 410x Depth 220 mm |
| Weight | 6.2kg (audio-database.com) vs 11kg (Instagram post by blantik_antik) |
Design
The APM 550AV uses a 2-way speaker configuration with an anti-magnetic type APM unit. It incorporates a built-in automatic recovery type protection circuit to prevent damage during high-power operation.
Market
Recent listings from September 2025 and January 2026 indicate current market prices of 1.8 million and 3.8 million Indonesian Rupiah, respectively. One unit was described as "Full original" with normal operation and clean condition. A YouTube repair video highlights potential woofer voice coil issues, suggesting this may be a known maintenance point for aging units.
eBay Listings
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