Tannoy ICT (Inductive Coupling Technology) speakers. These were brilliant and sounded wonderful but they didn't enjoy widespread popularity. Thought I might bring it up for your viewing pleasure. If you come across a pair, I highly recommend them for anyone wanting a very simple way to implement a 3-way front stage by using just 4 channels of signal and amplification. Link at the bottom. Some marketing text:
The point-source configuration of the TANNOY ICT driver’s mid-bass and tweeter sections ensures a wide and controlled dispersion for optimum coverage. By utilising a wireless electromagnetic tweeter that does not require a crossover and cannot be burned out from heavy or abusive use, this drive unit addresses the two most common component failures experienced in long term high power levels – the tweeter and the crossover.
The use of an inductively coupled 25 mm (1”) Duralumin domed wireless electromagnetic tweeter means that no crossover is required in the design. The high frequency dome has a deep drawn skirt which sits on the inside of the low frequency voice coil in the same magnetic gap. Like a single shorted turn, it is induced with high frequency information generated by the low frequency voice coil, which is fed a full bandwidth signal.
Linky --> tannoy
The point-source configuration of the TANNOY ICT driver’s mid-bass and tweeter sections ensures a wide and controlled dispersion for optimum coverage. By utilising a wireless electromagnetic tweeter that does not require a crossover and cannot be burned out from heavy or abusive use, this drive unit addresses the two most common component failures experienced in long term high power levels – the tweeter and the crossover.
The use of an inductively coupled 25 mm (1”) Duralumin domed wireless electromagnetic tweeter means that no crossover is required in the design. The high frequency dome has a deep drawn skirt which sits on the inside of the low frequency voice coil in the same magnetic gap. Like a single shorted turn, it is induced with high frequency information generated by the low frequency voice coil, which is fed a full bandwidth signal.
Linky --> tannoy
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