Foil Coils with Polypropylene as Insulator

The conductor is a foil made of (Angelique) copper, silver or (Angelique) silver-gold.

Electrical strengths

• Very low RDC achievable at high inductance
• High current capability → particularly attractive in the bass and lower midrange
• Parasitic capacitance is lower with foil coils than with round-wire coils

The decisive advantage: the calmest winding

Foil coils are structurally much more stable than round-wire windings – and in practice mechanically the calmest. Precisely because the foil is flat, dimensionally stable and tightly guided, the winding shows particularly little tendency to mechanical movement under load. In this respect, foil coils are noticeably calmer – even compared with very good baked varnish round-wire coils.