Alpha-Core, Inc.

6 Waterview Drive

Shelton, CT 06484

 USA

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 Air Core Foil Inductors     Available in Copper and Solid Silver

Since we introduced our Air Core Inductors in 1997 they have become standard fixtures in many of the Worlds finest speakers, and.....(read more)

E shopping: Audio Store

                                    

Leads: 0.010 x 0.321 inch copper or silver

 Conductors:   99.99% pure copper or silver foil
Dielectric:
0.0015 inch thick polypropylene film

Gauges:
12,14, and 16 AWG

Inductance Tolerance:
+/- 2.5%
Inductance Reactance:
Flat from 5Hz to 50kHz

Leading Edge Technology for
Loudspeaker Crossover Networks
 
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High-technology laminating from Alpha-Core ( the same process behind the patented Alpha-core's Serpents and Goertz MI audio cables ) makes it possible to manufacture inductors from high purity copper or silver foil wound onto a Lexan polycarbonate tube. Foil inductors are mounted by means of a single polycarbonate screw through the central bore, or a silicone elastomer, or a hot-melt adhesive.

Foil inductors have obvious advantages over wire-wound inductors in terms of improved electrical and sonic characteristics. This important new development has much to contribute to the design of state-of-the art loudspeaker crossover networks.

  • Negligible skin effect below 100 kHz; many orders of magnitude below conventional wire-wound types.
  • High winding tension and vacuum fusing of faces provide high dimensional stability, effectively locking the conductors in place. Wire-wound inductors, which allow relative motion of conductors due to electromagnetic forces, will exhibit FM distortion by the process of reactance modulation.
  • Flat inductive reactance from 5 Hz to 50 kHz.
  • No saturation distortion due to air-core design. Inductors contain no magnetic materials.
  • Reduced power loss. Highest space factor (ratio of conductor cross area to total cross-section) means lower DC resistance within comparable dimensions. Negligible power loss due to skin-effect.
  • Extremely low stored charge.
  • Cool operation even during prolonged high output power operation. The high space factor and winding density results in improved heat dissipation.