The very good condition of early field coil speaker Jensen A-12, this was manufactured using in Concert. Power supply is special ordered made, using tube to regulate the current of field coil.
If you dont need power supply, price will be discount 650USD.
Power supply is special ones, using tube 811, EL34, EF86, 6AQ5 to regulate the current on the fieldcoil. The current on field coil will be fixed help the sound more stabilized. This speaker is very special which need up to 200mA of current so it is very difficult to use tube for rectifier because no many tube can handle the current of 200mA.
Serial number of 2 unit is very close. It is matching pair. Perfect working condition.
Sound is dynamic, beautiful vocal and very musical.
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If you dont need power supply, price will be discount 650USD.
Power supply is special ones, using tube 811, EL34, EF86, 6AQ5 to regulate the current on the fieldcoil. The current on field coil will be fixed help the sound more stabilized. This speaker is very special which need up to 200mA of current so it is very difficult to use tube for rectifier because no many tube can handle the current of 200mA.
Serial number of 2 unit is very close. It is matching pair. Perfect working condition.
Sound is dynamic, beautiful vocal and very musical.