Rectangular Wire

A coil is always also a mechanical system: flowing current creates forces, and these forces can stimulate the coil. When windings vibrate under load, macro-microphony occurs — the coil becomes a secondary source of interference and this can mask subtleties in the signal. This is precisely where stretch wire offers a constructive advantage.

Compared to round wire, stretch wire is significantly more stable in shape and is less likely to move or spring under load. At the same time, its geometry allows a higher packing density, making it possible to achieve a lower R_DC and a more compact winding with the same inductance. Less resistance means greater control over the speaker and higher efficiency, especially in high-current branches.

The higher mechanical stability also ensures that less energy is lost as mechanical vibration. The sound remains quieter, transients become clearer and the dynamics feel more immediate. This effect is also relevant in parallel branches and correction elements, because additional macro-microphonic components can take effect directly on the loudspeaker.

Stretched wire is therefore not “another wire”, but a construction principle for greater stability and efficiency. It combines low R_DC with mechanical sovereignty — and that is exactly what is audible in audio applications.