ATA-288A is a stereo valve amplifier combining a refined Class A sound and robust output power by utilising push-pull Class A ultra-linear circuitry and automatic biasing in a dual mono configuration. The Class A operation keeps distortion low and provides for a natural highly enjoyable sound with an abundance of detail. ATA-288A was designed from scratch and benefits from the use of custom-made transformers designed and manufactured by Audes, including special flat-type UI core output transformers developed for the ATA-200 valve amplifier series. Only high-quality selected components are used: all resistors are carbon film, and audio circuit capacitors are of PIO (paper in oil) type.