hifi engine



Does anyone know where were these used?
Magnet stamped: 4H763


Re: 4H763

I would suspect this to be a twin coil loudspeaker often used in car cheap sub-woofer (I saw a very similar one in an Audi SW block, except that the chassis was made of ABS plastic (!) ). each of the couple of wires (red-black, yellow-green) been driven each by a separate power amp allowing more power with 'limited' voltage. But the quality suffers from mutual induction between the 2 coils...