Technics SB-F1
Technics SB-F2
Technics SB-F3
(1978 - 1984)

High-end audio in small sizes - a dream, isn't it ?
Not really high-end but, in 1978, really advanced bookshelf (literally this time) loudspeaker design.

High power handling, diecast alumium enclosures, rubber coating damping, aluminium voice coils, polyamide adhesives, polyester insulation, aluminium film caps (SB-F1 and SB-F2), high rigidity woofers, anti-resonant center cap (SB-F1), 10,000 Gauss magnetic flux, linear phase driver placement, linear phase (very linear for the SB-F1), copper-clad aluminium voice coil 2 or 3-piece horn tweeters, polyurethane free edge woofers - and good looks, too.

Basically using the same driver technology tricks as in the well remembered SB-7000A.
Upgraded in the mid 1980s as SB-F1mkII and SB-F2mkII.

I really wonder how these would compare today next to present offerings competing in "small size - big sound".