Manila Hemp Paper as Insulation
In powerful audio power supplies, strong forces act in the capacitor coil: load pulses generate magnetic fields, transformers transmit hum, housings can initiate vibrations. When the coil reacts mechanically, macro-microphone effects are created — in simple terms: The power supply not only “works” electrically, but also starts to vibrate mechanically. These macromechanical movements can be noticed as modulations of the supply voltage and thus indirectly impair playback.
Our approach: Macro-Microphony is calmed down at the source — in the wrap itself. A central component of this is high-quality Manila hemp paper as insulation and separator paper.
Technical properties
Fiber-elastic damping structure
Manila hemp paper has a tough, fiber-rich network. Under wrapping pressure, this creates a stable but not “hard” intermediate layer that absorbs and reduces vibrational energy — instead of passing it on unfiltered.
Mechanical decoupling of the film layers
As a separator, the paper not only separates the aluminum foils electrically but also mechanically. It reduces slipping, rattling and relative movement of the layers, which could otherwise be stimulated by impulse currents and external vibration.
Even distribution of force in the wrap
As a result of the flat support, the paper distributes forces more homogeneously over the width of the wrap. This reduces local voltage peaks and reduces the tendency for individual areas of the coil to build up as a resonance center.
Compression stability under winding tension
Under defined wrapping pressure, the structure remains sufficiently dimensionally stable to hold the coil together. This reduces significant movements (“pumping”) in the event of large current pulses.
Waterproof-friendly structure (as damping enhancer)
The fibrous structure is easy to wet and fill. A uniform impregnation additionally stabilizes the wrap and increases internal damping — an effective lever against macro-microphonic stimuli.
Sound character
When the power supply is not “pumping,” playback remains more controlled and confident: Impulses are clean, bass remains stable, and the overall sound appears quieter — especially under load and at higher levels.
Typical uses
- Audio power supplies with high pulse currents, for which mechanical silence in the coil is crucial
- Amplifier power supplies (class A, AB, D) with strong dynamic load changes
- Devices with transformer hum or mechanical stimulation, for which damping wrap insulation provides advantages
