Sansui, Technics,even NEC had horn hybrid speakers in the late 1970s, smaller horn speakers with a conventional cone bass speaker were practical as bass horn speakers needed a mouth six feet square and...
EMI 'thirteen and a half by eight' were elliptical speakers unpopular in the USA. Sound waves are round not elliptical! Made in England by KEF, rarer everywhere than hen's teeth, DECCA did a 'me too'in...
GLL Imagio IC 120, a wacky small Dual Concentric 3-way from England has 89dB SPL at 6 ohms, rubber suspension, poly cone and tweeter horn lens reminiscent of Lowther speaker s' old sound dispursment cones. GLL...