Field Coil Power Supply

Field Coil Power Supply

The Bettinger Audio Field Coil Power Supply was specifically designed to provide a low-noise, adjustable power source for field coil speaker drivers such as those by Lowther America. The power supply's unique design is a cross between a laboratory-grade DC supply and an exceptionally low noise audio amplifier. It provides an extremely stiff and fast response magnetic field for the voice coil to reference its output against. 

With 10mv resolution, its finely-adjustable output voltage allows the user to accurately fine tune both the speed and the sensitivity of the driver for spectacular resolution and integration with high speed subwoofer systems. 


  • Front panel adjustable voltage from +9 VDC t0 +13 VDC via 10-turn, wire-wound precision potentiometer 
  • Front panel 3.5 digit LCD display for output voltage monitoring with 10mv resolution
  • Front panel illuminated power switch
  • IEC AC power input receptacle and separate external AC fuse holder
  • Field coil output connectors: Neutrik Power-Con locking connectors with each channel individually fused
  • External heat sinking for power devices
  • Superior quality; easily serviceable


  • Input: 120/240 VAC
  • Output: 9-13 VDC at up to 3 amps. 
  • Load regulation: Constant voltage: +/- mv after ~90 minute warm up
  • Line regulation: +/- 10%
  • Ripple and noise: Constant voltage: < .1 mv full load
  • Temperature ranges: Operating: 50 degrees to 85 degrees F. Above 85 degrees F., fan cooling is suggested. An internal thermal cutout is included on the power stage.
  • Stability: +/- 20mv at full load
  • Overload protection: AC fuse, inddividually protects fused power electronics and DC outputs. A thermal cutout monitors the electronics' temperature. 
  • Meter: Front panel 3.5 digit LCD with 10 mv resolution
  • Output Terminals: Neutrik Power-Con
  • Cooling: Convection
  • Size: 9.5" x 9.5" x 4.0"
  • Shipping weight: 12 pounds
  • Finish: Powder-coated black aluminum extrusions with hardwood side paels
  • Power cord: IEC receptacle

Retail price: $2,295.00 

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