Cyber-100 15th anniversary integrated amplifiers

Cyber 100 15th anniversary special version !

If Opera audio has ever offered a more-than-ten-years line of equipment with a coherent design philosophy, it should be the 15-year-old M100 series push-pull integrated amplifiers. In fact, opera audio has centered the philosophy on the highly over-specified massive output transformers, which are entirely hand-wound at the factory. Actually they are output transformers with 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 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 presentation.

Stepped into 2008, Opera audio and some of satisfied M100 users, including most of our long time distributors, conspired to develop a 15 th anniversary amplifier that would completely conform to the special conception of what a push-pull pentode integrated amp should sound like.

The pursuit of Cyber100-15 th is music and the most natural reproduction of sound an affordable integrated amp can possibly achieve. This amp has a superb and enchanting midrange, the result of the harmonic balance that opera audio has purposely, and possesses an extraordinarily smooth balance throughout the spectrum, providing a stronger impression of live music. The exterior of the unit succeed to Cyber 100 signature, with alum top lid, walnut wood deck and a 15th anniversary logo.

Self-biasing JJ KT88( or 6550 EH for the cheap version) works at Class A, UL operation, with a well designed NOS 5687 drive stage and a time–proved rectifier circuit consisted of 5AR4 EH rectifier tubes and Philips electrolytic capacitors (for audio). Every component chosen to use has been selected because of the effect on the sound of the amplifier. And that even goes for those German made power on/off switch. After all the KT88/6550s aren't triodes but, if properly applied as such in a circuit with 35 push-pull watts output, they can exhibit surprisingly good linearity, steady performance and approaching that of the real thing – something you'd expect from the triodes unit running in single-ended and powerful enough as well.

Specification:

Control Functions: Volume, Select, Power On/Off
Power Output: 35 watt, RMS 1kHz
Total Harmonic Distortion: less than 1%(10watt, 1kHz)
Frequency Response: (-3dB points at 10 watt) 6Hz-50kHz
Input Sensitivity: 220mV
Input Impedance: 100k ohms
Output Impedance: 4 , 8 ohms. User selectable.
Signal/Noise: 90dB
Consumption: 290watt
Output Interfaces: 1 groups (RCA)
Input Interfaces: 5 groups (RCA) 1,2,3,4,5
Overall Negative Feedback: Little (-6dB)
Vacuum Tube: KT88/6550 x 4, 5687 x 2, ECC83 x 1, 5AR4 x 2
Dimensions: 430 (L) x 380 (W) x 190(H) mm
Weight: 25kg (packed)

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