KEF Speakers 1979
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12-page brochure from KEF Electronics distributed in Japan by BSR Japan, the full 1979 line-up. Reference Series headed by Model 105 series II (3-way with separate top heads for tweeter and mid following the Listening Window concept), plus Model 104aB and Model 101, then the more affordable Model 304 and 303 on stands, a dedicated page with KEF drivers T27, B110, B200, B139 and DIY kits Cantata and 104aB. The middle of the booklet (“The KEF Story” and “The KEF Philosophy” spreads) is about the BBC LS3/5A and LS5/1A monitor heritage, 100% computer-selected units on the production line, and built-in electronic protection circuit against driver overload.
P.S. Tucked inside the brochure were four pages from a Japanese audio magazine carrying Tetsuo Nagaoka’s reviews - a clipping from the previous owner’s collection, written up as a separate exhibit.
- リスニングウィンド (Listening Window) - Listening Window - a uniform-directivity zone of 40° horizontally and 10° vertically around the main axis, giving stable tonal balance from any reasonable seating position.
- 100%精度ユニット - 100% selected units - every Reference Series driver is computer-tested on the production line, each unit matching the reference spec without batch culling.
- エレクトロニク・プロテクション・サーキット - Electronic Protection Circuit - built-in electronic protection against driver overload, the Model 101 trips a relay and warning lamp on overcurrent and survives amplifiers up to 300W.
- BBCモニター・スピーカー LS3/5A・LS5/1A - BBC Monitor Loudspeakers LS3/5A and LS5/1A - British BBC studio monitors built on KEF drivers, the foundation for the Reference Series.
- ベキストレン (Bextrene) - Bextrene - cone material (a polystyrene composite), used by KEF since the late 60s to remove the colouration in the bass range.
| Model | Type | Price |
|---|---|---|
| KEF Model 105 series II | speaker system | |
| KEF Model 104aB | speaker system | |
| KEF Model 101 | speaker system | |
| KEF Model 304 | speaker system | |
| KEF Model 303 | speaker system | |
| KEF T27 (SP1032) | speaker driver | |
| KEF B110 (SP1003) | speaker driver | |
| KEF B200 (SP1014) | speaker driver | |
| KEF B139 (SP1044) | speaker driver | |
| KEF Kit Cantata | speaker system | |
| KEF Kit 104aB | speaker system |
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