Kenwood LS-406
The Kenwood LS-406 is a large floor-standing speaker from the mid-1970s, part of the LS series that Kenwood promoted heavily at the time. It's a 3-way, 4-speaker bass-reflex design, and the drivers tell you it was built to move some air: a pair of 25 cm cone woofers up front, an 8 cm horn-type midrange and a 2.5 cm horn tweeter. Crossover points are at 800 Hz and 6 kHz. The system is rated at 90 W maximum input, with a sensitivity of 90 dB/W/m and a nominal impedance of 8 ohms. Frequency response is quoted at 40 Hz to 20 kHz.
The cabinets are big - 470 mm wide, 800 mm tall, 350 mm deep, and 28 kg each. They were sold as a matched pair of speaker systems, and a crossover network (divider) was included with the unit. A period ad in High Fidelity (1976, p.30) touted the LS series' "Daphne Diaphragm" woofer material and lumber-core baffle construction. Another, in HiFI-Stereo (1977, p.13), claimed the line offered performance beyond its price point. That ad referred to a $325-class speaker selling for under $250, which may or may not describe the LS-406 specifically.
Beyond the specifications, the documentary record is thin. No production years, original price, or cabinet finish details are documented, and no period reviews measuring the LS-406's performance have surfaced.
**Known specifications:**
- Type: 3-way, 4-speaker bass-reflex
- Drivers: 25 cm cone woofer × 2, 8 cm horn midrange, 2.5 cm horn tweeter
- Frequency response: 40 Hz - 20 kHz
- Maximum input: 90 W
- Impedance: 8 Ω
- Sensitivity: 90 dB/W/m
- Crossover: 800 Hz, 6 kHz
- Dimensions: 470 × 800 × 350 mm (W×H×D)
- Weight: 28 kg
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