Bitone 610 No further information known.
VITAVOX Bitone 6201: I believe the early versions may have been fitted with a Type B compression unit but later models came with the GP1. Also featured a 12 inch bass unit and a CN126 horn.
Bitone Reproducer Series 3200 frequency response 50 to 15,000Hz
From an original Vitavox brochure:
"Not Magic Ö itís the result of intensive engineering research.
Thereís no magic in the design of Vitavox loudspeakers, there are no short cuts to perfection. The magicianís approach to loudspeaker design has produced many a red herring out of the hat by mistake and the years of steady development work which we have undertaken show that itís not all done by mirrors. A typical example of Vitavox design for sound. Bitone Reproducers are intended for quality reproduction in small halls in conjunction with sound film projectors, for speech reinforcement systems or for musical reproduction, the use of multicell horns in the high frequency channel ensuring maximum fidelity over a wide area."
See the original advert here: Bitone advert
Some pictures of a Bitone here
Black Night: 3 way active system with a frequency response of 50 to 18,000 using 15 inch bass, 10 inch mid and S5 HF. Can also be use with the Thunderbolt to make a 4 way system.