Kenwood LS-403
Little is documented about the Kenwood LS-403. The record is thin enough that even the product type isn't confirmed in surviving research materials. The model name shows up in period references, but without the context that would say whether it was a speaker, an amplifier, or something else.
What the record does show: the LS-403 belonged to Kenwood's LS series of the mid-1970s. High Fidelity (1976, p.27) called the line "speaker systems way ahead of their time," and advertised the series' Daphne diaphragm material, lumber-core baffle boards, and bass-reflex design. A period spec listing in HiFI-Stereo (1977, p.140) describes an LS-series model in that range with a 10" Flexair woofer, 3" cone midrange, and 1½" dome tweeter, rated at 100 W power capacity with a frequency range of 27-25,000 Hz. That entry appears to describe a sibling model (likely the LS-540). No equivalent spec sheet for the LS-403 has survived.
No production years, original price, or technical specifications for the LS-403 have been confirmed. If you own one, the grille badge and driver complement would help pin down which variant this is. Documentation is welcome.
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