The KEF Reference Series Model 101 is a bit of a cult classic in the audiophile world. Produced between 1979 and 1986, it was KEF’s answer to the legendary LS3/5a BBC monitor—essentially taking that same compact, high-performance DNA and refining it for the domestic high-end market.

Here is an overview of why this "bookshelf" speaker still commands respect today.

Design & Philosophy

The Model 101 was designed to provide accurate, full-range sound (within the laws of physics) from a tiny enclosure. KEF used their Target Function design approach, utilizing computer-aided modeling—which was cutting-edge at the time—to ensure the drive units and crossover worked in perfect synergy.

Enclosure: A heavily braced, 6.7-liter sealed box (acoustic suspension).

Driver Complement: It features the iconic T33 high-frequency tweeter (SMR) and the B110 low-frequency bass/midrange driver (the same driver used in the LS3/5a).

Crossover: A complex, high-order network designed to keep the frequency response exceptionally flat.