Inside the Cambridge 651A Amplifier is a fully balanced dual differential circuit usually not found in amplifiers under the $2000 price range. The fully dual differential amps ensures that any noise and variation of parts are rejected. Lower noise means finer detail and resolution. The Cambridge 651A amplifier has a Toroidial transformer which is more efficient and generate less hum and noise and EI core Transformer. There are Individual Taps for the Left and Right Channels making it Dual-Mono for better separation. The Cambridge 651A comes with a high grade Film Type Volume Control often used to modify other amps for get higher performance. Finally, the Cambridge 651A comes with a USB DAC that you can hook up your computer to, making the most of music storage and collection.
Compare at twice the retail price $879.99, the Cambridge is still a Fantastic Deal.