Opera Consonance Cyber100 15th Anniversary Integrated Amplifier

Here we have a fine valve amplifier from Opera Audio. The Cyber100 15th anniversary edition is in very good condition and supplied in original box and mostly factory packaging along with remote control unit, manual plus our regular three month warranty.
Opera Say….
If Opera audio has ever offered a special anniversary line of equipment with a coherent design philosophy, it would be the 15-year-old M100 series push-pull integrated amplifiers. Opera Audio has centred its philosophy on highly over-specified massive output transformers, which are entirely hand-wound at the factory. These transformers are in fact output transformers with a non-symmetry configuration. Power pentodes like the KT88, 6550, 6CA7, KT77 and EL34, are configured to function and sound like single-ended triodes with the advantage of considerably increased output.
The whole M100 series line has been built around this concept. From M100, M100MKII, M100SE, M100plus to the Cyber 100 signature, they were gradually making their mark, slowly improving their design’s most glaring faults, one unit at a time, and yet – the critics could not deny the utter musicality and the extraordinary presence.
Stepping into 2008, Opera audio and our satisfied M100 users, including most of our long time distributors, worked together to develop a 15th anniversary amplifier that would completely conform to the special concept of what a push-pull pentode integrated amp should sound like.
The pursuit of the music purity and the most natural reproduction of sound in an affordable integrated amp that can possibly be achieved. This amp has a superb and enchanting midrange, the result of the harmonic balance that Opera Audio has always strived for and possesses an extraordinarily smooth balance throughout the spectrum, providing a stronger impression of live music. The exterior of the previous Cyber 100 signature has been modified with an aluminium top cage, walnut wood deck and a 15th anniversary logo.
Self-biasing KT88/ 6550 works at Class A, UL operation, with a well-designed NOS 12BH7 drive stage and a time–proven rectifier circuit consisted of the 5AR4 EH rectifier tubes and Philips electrolytic capacitors (for audio). Every component chosen has been carefully selected for better audio clarity, that even goes for the German made power switch. After all the KT88/6550s aren’t triodes but, if properly applied as such in a circuit with 35 push-pull watt output, they can exhibit surprisingly good linearity, steady performance and approaching that of the real thing – something you’d expect from triode units running single-ended and powerful enough as well.
Specifications:
Circuit Type: Class A, push-pull amplifier
Power Output: 35 watt, RMS 1 kHz
Input Sensitivity: 220 mV
Noise and Hum: -90 dB below full output
Frequency Response: (-3 dB points at 10 watt) 6 Hz – 50 kHz
Tubes: ECC83 x 1, 5687 x 2, 5AR4 x 2, KT88/ 6550 x 4
Resistors: 1% Metal Film
Input Impedance: 100 kOhms
Output Impedance: 4, 8 ohms. User selectable
Consumption: 290 watt
Output Interfaces: 1 groups (RCA)
Input Interfaces: 5 groups (RCA) 1,2,3,4,5
Overall Negative Feedback: Little (- 6 dB)
Warm-Up Time: 3 Minutes
Dimensions: 430 (W) x 380 (D) x 190 (H) mm
Weight: 25.0 kg (packed)