Philips 2047 field coil speaker

Philips 2047 field coil speaker Here we have a ultra rare Philips 2047 field coil speaker . 30 cm = 12“ Made between 1930 and 1940 we suppose. This Philips 2047 field coil speaker has around 15 Ohm voicecoil ( cinema standard at that time ) and only 15 Ohm for the field coil. That allows to run the unit with a “ battery “ , in case 5.8 Volt DC with around 0.4 Ampere. Not for disco but clear sounding for such an old speaker. No rubbing , the optical is more bad than the technic . Enjoy this nice Philips 2047 field coil speaker .