The Audio Note (UK) SORO Integrated Amplifier is a pure Class A amplifier, which means that its output devices are always conducting at full power, regardless of the signal level. This results in a highly linear and natural sound that is often preferred by audiophiles.

The SORO is available in both push-pull and single-ended valve designs, just like the OTO amplifier. The push-pull version of the SORO is classified as Level 1 and uses a pair of output devices per channel for greater power and efficiency. The single-ended version is classified as Level 2 and uses only one output device per channel for a more direct and uncompromised signal path.

The SORO SE Integrated Amplifier uses a number of high-quality components to achieve its exceptional sound quality. Some of the key components include Audio Note (UK) foil capacitors, which are used in the most critical areas of the amplifier to provide exceptional sonic transparency and detail. Dual power supplies and transformers, with one dedicated to the output stage and the other for the remaining circuitry. This helps to ensure that each part of the amplifier is powered with a clean and stable voltage, which is critical for achieving the highest possible sound quality. Lastly, a custom-designed output transformers, which are manufactured by Audio Note (UK) and are one of the most critical components in any valve amplifier. These output transformers help to ensure that the amplifier can deliver a highly controlled and extended bass response, which is often a challenge for valve amplifiers.

The single-ended version is also available with an integrated phono stage as SORO Phono SE and SORO Phono SE Signature incorporating high-quality components to achieve its exceptional sound quality.

Some of the key components used in the SORO Phono SE Signature include Audio Note (UK) Copper foil capacitors, which are used in the most critical areas of the amplifier to provide exceptional sonic transparency and detail, Audio Note (UK) Tantalum resistors, and custom-designed IHiB output transformers, which are manufactured by Audio Note (UK) and are one of the most critical components in any valve amplifier.