Silver

As an electrode material, silver offers a very good insight into the finest structures: microdetails, decay processes and room information are exceptionally clearly and cleanly perceivable. The presentation appears sober and precise rather than “warming” — without being harsh or unpleasant. It is precisely this restraint that makes the microstructure of the music particularly transparent: calm, high-resolution and very easy to hear.

Polypropylene as the Insulator

The conductor of the coil is a foil made of (Angelique) copper, silver, or (Angelique) silver-gold. Unlike enameled copper wire, for example, the foil is not coated with enamel for insulation; instead, a polypropylene film wound together with the foil conductor serves as the insulator.

Electrical strengths

• Compared to wire enamels, polypropylene has a low dielectric constant and very low dielectric losses → very low parasitic capacitance
• The polypropylene film is thicker than a typical wire enamel coating → further reduced parasitic capacitance
• A foil coil tightly wound with PP film forms an extremely solid block. The softer PP film also provides strong damping against mechanical vibrations.

Massive Metal Foil

Solid metal foil means: A real metal foil forms the electrode — not a wafer-thin coating. This provides very high, uniform conductivity along the coil, reduces field gradients and enables high current carrying capacity. The higher film weight reduces field force-related vibrations and the electrode remains stable even under impulse load. This creates a robust basis for demanding applications that transfers energy directly and in a load-stable manner — without “flickering” on the electrode side.

Tonal effects

• More pressure and control in the bass/root tone, with clearer contours instead of buzzing
• Superior at level peaks: less compression, more headroom and punch without harshness
• Cleaner transients and more stable dynamics, even with fast pulse trains
• Quieter, more ordered sound: less flicker/internal discolouration, better audibility in complex passages

Air coils

Air coils are the uncompromising reference: maximally linear, without distortions caused by the core. They deliver maximum impulse fidelity and particularly natural, open playback. If space and a sufficiently low DC resistance are possible, air is the first choice.

Baked Varnish Wire/ Resin Soaking

Baked varnish wire is enamel-insulated wire with an additional, activatable hot-melt outer layer, which has an adhesive effect when heated. The windings are thus fixed together.

Impact in practice

• The coil becomes mechanically stable and „works“ significantly less
• Micro-movements between windings are reduced
• In particular, this reduces macro-microphonic effects (the windings „work“ less) and increases “silence” during operation

Resin soaking as an alternative to baked varnish wire

If no baked lacquer wire is used, resin soaking carried out under vacuum can take over the mechanical fixing. The resin penetrates into the wrap, reduces cavities and degrees of freedom of movement and transforms the wrap into a stable compound. The result: significantly less macro microphones and an overall quieter, more precise operation of the coil.

Air coils

Air coils are the uncompromising reference: maximally linear, without distortions caused by the core. They deliver maximum impulse fidelity and particularly natural, open playback. If space and a sufficiently low DC resistance are possible, air is the first choice.

OFC Copper

• Purity: at least 99.995% Cu, often 99.999% (4N) or higher
• Feature: almost oxygen-free (typically <10 ppm)
• Result: more stable grain boundaries, less oxide formation, more uniform electron flow