Yamaha NS-M325 (2005)
The Yamaha NS-M325 is a compact two-way bookshelf speaker introduced in 2005 as part of the company's 325 series of home theater and stereo speakers. It sold individually for ¥15,000 at launch. The enclosure is sealed (acoustic suspension) and has anti-magnetic shielding, so it can sit near a television or other video display.
Each cabinet pairs a 10 cm cone woofer with a 3 cm dome tweeter made from an aluminum-magnesium alloy. Yamaha put real engineering into the drivers. The woofer uses a PMD (Polymer Injected Mica) diaphragm with a foamed EPDM surround and a hybrid spiral voice coil. The tweeter combines its diaphragm and voice coil bobbin into a single DC diaphragm system, which cuts moving mass. The crossover uses a metalized PP capacitor from Solen and a large-capacity coil with a 1 mm winding diameter. The internal wiring is tuned separately for the woofer and tweeter paths. The cabinet is finished in real mahogany veneer. A black finish was added after the initial cherry-only release. Input connections are large gold-plated brass terminals.
The rated specs are modest: 6 Ω impedance, 86 dB/2.83V/m sensitivity, 30 W allowable input (120 W maximum), and a frequency range of 65 Hz to 50 kHz (-10 dB), extending to 100 kHz at -30 dB. The crossover is set at 2.5 kHz. Each speaker measures 150 × 275 × 175 mm and weighs 3.8 kg. A 10-meter speaker cable came in the box.
The manual says these are magnetically shielded and meant for shelf or wall mounting. They were marketed for both stereo and multi-channel setups. The historical record is thin after that - no formal period reviews or detailed reception data have surfaced. Marketplace listings from recent years show widely varying used prices, from roughly DKK 200 in Denmark to ₽70,000 in Russia, which likely reflects regional scarcity rather than any established collectible value.
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