MCoil CFC
Air coil with copper foil conductor and polypropylene insulation. Completely free of core-related effects and fully linear even at high levels. The turns of the PP-insulated copper foil lie tightly and extensively on top of one another in the winding, thus ensuring an extremely compact and dimensionally stable winding structure.
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Use our product finder to filter for components based on key specifications. This ensures you get the best results tailored to your individual requirements.
CFC10
Air-core coil with copper foil conductor and polypropylene insulation – completely free of core-related effects and fully linear even at high levels. CFC10 (AWG10 / 5.26 mm² / Ø 2.588 mm) is designed for maximum current-carrying capacity and very low RDC. It delivers particularly high stability, control, and dynamics in the bass/fundamental tone thanks to its extremely stable foil winding.
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
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.
25
Products
CFC12
Air-core coil with copper foil conductor and polypropylene insulation – uncompromisingly free of core-related effects and fully linear even at high levels. CFC12 (AWG12 / 3.31 mm² / Ø 2.053 mm) combines very low RDC with high current handling capacity and delivers particularly smooth, controlled reproduction in the fundamental and bass.
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
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.
24
Products
CFC15
Air-core coil with copper foil conductor and polypropylene insulation – completely free of core-related effects and fully linear even at high levels. CFC15 (AWG15 / 1.65 mm² / Ø 1.450 mm) is designed for precise filtering at moderate current levels and impresses with high stability and clean fine dynamics.
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
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.
24
Products
CFC18
Air-core coil with copper foil conductor and polypropylene insulation – completely free of core-related effects and fully linear even at high levels. CFC18 (AWG18 / 0.823 mm² / Ø 1.024 mm) is ideal for precise correction and transition tasks with maximum mechanical stability and clear fine dynamics.
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
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.
24
Products