
The S9 is Unison Research's flagship push-pull tube amplifier, delivering 40W per channel. Featuring KT120 output tubes and a massive power supply in a stunning wooden chassis, it represents the ultimate in tube amplification.
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The S9 delivers a powerful, refined sound with exceptional dynamics and control. Bass is deep and authoritative, with excellent grip and definition. The midrange is rich and transparent, with exceptional presence. Treble is extended and smooth.

The IS-1000 Deluxe is Gold Note's flagship integrated amplifier, combining exceptional power with refined musicality. This fully balanced design delivers 125W per channel into 8 ohms, with the ability to double into 4 ohms. The optional DAC and phono modules transform it into a complete audio hub.

The IS-1000 Line is Gold Note's acclaimed integrated amplifier, offering exceptional performance at a competitive price. This design delivers 125W per channel into 8 ohms, with the ability to double into 4 ohms. The result is an amplifier that combines power with musicality.

The PA-1175 is Gold Note's reference power amplifier, designed for those who demand the ultimate in power and control. This dual-mono design delivers 175W per channel into 8 ohms, with the ability to double into 4 ohms. The result is an amplifier that can drive any speaker with authority.

The Triode 25 is Unison Research's flagship single-ended triode amplifier, delivering 25W of pure Class A power from a pair of 845 output tubes. This hand-built masterpiece represents the pinnacle of Italian tube amplifier design, combining exceptional craftsmanship with soul-stirring musicality.