Nagra
AMP II-S
Nagra AMP II-S stereo power amplifier makes its world premiere in the UK
The stereo power amplifier joins the PREAMP II-S in Nagra's Series II range and succeeds the Classic AMP, introduced in 2015. Presentations in Warsaw and Tokyo follow the UK premiere.
Georg S. Kuklick
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Audio Technology Switzerland has introduced the Nagra AMP II-S stereo power amplifier, the latest addition to its Series II range. The AMP II-S made its world premiere at The Happening, organized by Absolute Sounds at Haycock Manor Hotel in the United Kingdom on 17–18 October 2026. It is designed as the partner to the PREAMP II-S preamplifier.
The AMP II-S delivers 120 W rms per channel into 8 ohms, with the first 10 W operating in Class A. A single pair of MOSFET output transistors per channel is used in the output stage. The new linear power supply is built around a custom-made 800 VA potted transformer. According to Nagra, this architecture provides greater energy reserves and increased voltage headroom.
The amplifier succeeds the Nagra Classic AMP, introduced in 2015. Nagra states that every critical area of the design was revisited, including the power supply, input stage, circuit layout, thermal management and mechanical construction. Development drew on the company’s work on its HD and Reference electronics. The new input board is derived from the Reference AMP. Revised circuit layouts, selected internal wiring and optically isolated controls are also part of the design.
A CNC-machined heatsink provides thermal inertia and minimizes vibrations. A specially designed transformer suspension reduces the transmission of mechanical vibrations. The front panel retains Nagra’s MODULOMETER™, a feature inherited from the company’s professional recorders.
Following the UK premiere, the AMP II-S is being presented at Audio Video Show 2026 in Warsaw, Poland, and at Tokyo International Audio Show 2026 in Tokyo, Japan, both held 23–25 October 2026. Further demonstrations and events with Nagra distributors and dealers worldwide are planned.
Audio Technology Switzerland S.A. was created in 2012 from the former NAGRA Audio division and remains largely owned by the Kudelski family. The Nagra name dates back to 1951, when Stefan Kudelski created the first Nagra recorder.
Key specifications
Product type | Stereo power amplifier |
|---|---|
Power output | 120 W rms per channel into 8 ohms |
Amplifier class | First 10 W operating in Class A |
Power supply | Linear power supply with custom-made 800 VA potted transformer |
Output stage | Single pair of MOSFET output transistors per channel |
Input board | Derived from Reference AMP |
Controls | Optically isolated |
Heatsink | CNC-machined |
Transformer suspension | Specially designed, to reduce mechanical vibration transmission |
Front-panel meter | MODULOMETER™ |
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