to air coils: 0,71 mm 1,0 mm 1,4 mm 2,0 mm 2,5 mm 3,0 mm baked varnish air coils: 0,71 mm 1,0 mm 1,4 mm

Mundorf, specialist for inductors and capacitors Baked Varnish Coils and Vacuum Impregnation

In non-impregnated coils, vibration occurs as a result of the current flowing through the coil.

The microphonic effect, i.e. the conversion of mechanical into electric oscillations, adds these oscillations back to the original signal as additional information. In this way, details of the original signal are overlaid and rendered unrecognisable. The music loses spatial quality and transparency. This process is prevented by vacuum impregnation.

In vacuum impregnation, the coil is first impregnated with a special lacquer under vacuum. Because of the vacuum, this lacquer flows right into the innermost windings. The lacquer is subsequently dried in an oven at 130 øC (with Mundorf technology). Thus the whole coil is baked into a very solid unit. The individual windings are prevented from vibrating and the original signal remains uncorrupted.

Vacuum impregnation preserves musical details which give the music natural liveliness and an excellent spatial quality. It is thus an important component for a really audiophile reproduction of music.

The windings of baked varnish coils are made using a special wire. After the coil has been wound it is heated up causing an additional layer of varnish on the wire to melt, bonding the individual windings firmly together. The effect is similar to that achieved with vacuum impregnation, but this process is cheaper for small coils. Baked varnish coils are available with winding diameters from 0.71mm - 1.40mm. All series are identified with a "b" prefix.

Using coils till 1.4 mm we recommend baked varnish coils, above vacuum impregnation.
Coils overview

Mundorf coils Properties
Air core coils good price/performance ratio; low distortion
Baked varnish air core coils good price/performance ratio; low distortion
Copper foil coil (cfc) with excellent three-dimensionality and attention to detail; they belong to the group of exceptionally neutral .
Air-core coils made from silver/gold wire
Ferrit core coils good price/performance ratio; high inductivity
H Core Coils small impedance; high power handling
Aronit core coils
Feron i core coils small impedance; very high power handling
Zero Ohm Coils very small impedance; very high power handling