Aries Cerat Diana Integrated Tube Amplifier

Using borrowed techniques and circuits from the company’s top-line monoblocks like the Concero 65 and pre-amp stages like the Pondera Ref Aries Cerat have come up with what they describe as being “the absolute and superlative design in integrated amplifier”.

The Diana is a three stage, all direct heated triode single ended amplifier.

All three stages are designed as direct heated single ended amplifier stages. The first two stages are loaded with bifilar-wound, interstage transformers with no coupling capacitors present in the signal path.

Input tubes are a pair of DHT 814 tubes, driving another 814 pair, which drives a pair of 813 DHT output tubes.

The power supplies are fed by 800VA and 1000VA (1800VA total) transformers, controlled by a soft start circuit. The four 814 and two 813 tubes, all have their separate choke filtered PSUs and all 6 filaments are powered by 6 triple filtered PSUs, to provide solid power reserves.

Output stage power supply ,uses three film SuperCapacitors weighing 3Kg each whilst biasing of the input, driver and output tubes is attained via special biasing circuits, and all stages can be fully adjusted and monitored while listening.

Attenuation method is discrete-relay-switched-resistors.