Kenwood LSF-333 (c. 1997)

The Kenwood LSF-333 is a compact 2-way bookshelf speaker from the late 1990s. It sold as a pair for ¥34,000. It's passive and bass-reflex, with a 13 cm cone woofer and a 2.5 cm soft dome tweeter, crossed over at 3.5 kHz. Rated input is 30W with a 60W maximum. Sensitivity is a modest 86 dB/W/m and impedance is 6Ω. Frequency response is spec'd from 55 Hz to 30 kHz. Each speaker measures 206 × 362 × 267.5 mm and weighs 6.5 kg.

Kenwood built the LSF-333 around a "point source" concept, aiming for coherent, natural imaging from a compact footprint. The crossover network includes a conductor length compensation element - a non-inductive winding resistance that equalizes the signal path lengths to the two drivers. Per Kenwood's own documentation, the intent was to make the connection between woofer and tweeter "natural" and the sound image three-dimensional. The speaker terminals are gold-plated banana jacks.

The cabinet is magnetically shielded (anti-magnetic design, EIAJ), so it can sit near a CRT television. That was a common concern for Japanese domestic-market speakers of this era.

Documentation on the LSF-333 is thin. There's no confirmed production run, no official lineup positioning, and no professional reviews in the Western audio press that could be found. Japanese database listings place it around 1997. One Russian marketplace seller describes a pair as "sounding great, fully working, requiring a little maintenance due to age" - which is about as close to a user review as exists publicly.

One database claims the LSF-333 has a built-in amplifier and Bluetooth. That is almost certainly wrong. It contradicts the passive design documented by the more detailed Japanese source, and the same site makes other claims (remote control, "premium price tag") that don't fit a modest 1990s bookshelf speaker. That source is disregarded here.

Known specs:

• Type: 2-way, 2-speaker, bass-reflex, bookshelf
• Woofer: 13 cm cone
• Tweeter: 2.5 cm soft dome
• Frequency response: 55 Hz – 30 kHz
• Rated / max input: 30W / 60W
• Impedance: 6 Ω
• Sensitivity: 86 dB/W/m
• Crossover: 3.5 kHz
• Dimensions (W×H×D): 206 × 362 × 267.5 mm
• Weight: 6.5 kg
• Original price: ¥34,000 per pair (c. 1997)

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