Silver – Gold Metallization (Ag—Au)

The Silver-Gold Metallization combines two very different but ideally complementary properties in one electrode: the extremely high conductivity of silver and the interfacial stability of gold. As the main component, silver is responsible for the metallization’s high electrical conductivity. The small amount of gold serves primarily to stabilize its microstructure and interfaces.. Due to the high electrical conductivity and the long free path lengths of the electrons, currents can flow with minimal ohmic loss and very low 1/f noise. The metallization reacts quickly and sensitively and reflects the slightest changes in level particularly precisely — especially at high frequencies and very small signals.

In this combination, gold is not an “effect metal”, but acts in the background as a diffusion brake and interface stabilizer. Even a small amount of gold ensures that the microstructure at grain boundaries and interfaces changes more slowly. Diffusion processes are slowed down, local inhomogeneities in the metal grid are smoothed out, and the metal surface ages less. This creates a metallization with an independent profile, both electrically and microphonically: The high conductivity of silver is fully retained, the gold content stabilizes the interfaces, and the resulting microspectrum — i.e. the fine noise and modulation behavior — is smoothed out, particularly in the range of very small signals and over long periods of time.

Silver-gold is therefore deliberately not just a “refinement step,” but a metallurgy that combines long-term stability, the finest texture and high conductivity in one material. Especially in audiophile applications, where the sound signature should remain consistent over many years, this combination is clearly audible — with more silence, more color and a particularly harmonious balance of insight and musicality.

Tonal Effects

• Timbres appear rich, differentiated and at the same time ordered — colorful but never chaotic; instruments retain a clear contour despite full saturation.
• More liveliness, warmth and depth of color without losing tracing; timbres appear “composed out” rather than just emphasized.
• Very stable, long-lasting signature: clear, calm and “mature”, not nervous or changeable.
• Fine textures (voices, strings, cymbals, overtones) stand out clearly, without hardness or glassiness.
• The room appears more vivid and self-evident; quiet room information and reverberation flags remain stably visible.
• The mix of insight (silver) and heart, rhythm and joy of playing (gold) was an essential component of the worldwide success of the MCAP Supreme series — and the MCAP Evo series derived from it.