The Audio Note (UK) OTO Integrated Amplifier is a Pure Class A, producing an outstanding level of performance.

The output transformers are custom designed and manufactured by Audio Note (UK) and are of extremely high quality, offering outstanding, class leading performance in today’s world of high performance audio.
Single Ended.
​Part selection is optimised to realise the most neutral and realistic sonic reproduction.
​The OTO SE models fulfil all Audio Note (UK) Level 2 criteria: -
​Pure Class A Single Ended Pentode operation
Materials and component quality.
Some of the superior quality components utilised in the OTO SE Signature include: -

Audio Note (UK) Copper foil capacitors used in the most critical areas. Audio Note (UK) Tantalum resistors used in the most critical areas. Custom designed IHiB output transformers, manufactured by Audio Note (UK). These output transformers – one of the most critical areas of valve amplifier design – allow the OTO SE Signature to produce impressively extended and controlled bass.