​​​​​​​The Masterclass ANV-50 is a new integrated amplifier released to celebrate Sugden Audio’s fiftieth anniversary.

It is a unique design with many innovative features and specially developed audio circuits.

In 1967 Sugden released the world’s first solid state pure class A amplifier, the A21.  The ANV-50 promises to revisit this golden age of British audio engineering, with a design focused on the demands and preferences of today’s audio enthusiast and music lover.​

The ANV-50 has at its heart, a pure class A amplifier and this is coupled to an advanced ‘ideal’ final output stage.  This unique two stage amplification system guarantees our signature pure class A sound, with the ability to drive the vast majority of loudspeaker systems.

The sophisticated final output stage features a comparator and correction circuit so that errors which could occur in the power output section due to varying loads and distortion, are corrected to match the output of the high impedance input amplifier.  Whilst maintaining the signal authenticity, it also increases the load stability and forces the output impedance to zero.  This special output stage with Sugden Error Correction has extremely low open loop output impedance with a resultant high damping factor at quite high frequencies. It also benefits from overall Current-Feedback.