Superior mono blocks among the top three producers belonging to Chinese audio: OPERA CONSONANCE. This leading company is innovative,

showing technical excellence and produces great performance and perfect sounding audio equipment.





  • New upgraded model to the famous Cyber 845
  • New vacuum tube rectification using 4 x Russia made 5AR4
  • Multi purpose meter for bias adjustment / monitoring
  • Newly designed chassis matching their flagship preamplifier
  • 845 single ended mono power amplifier
  • None negative feedback design - shortest signal path
  • 2 x E88CC employed in input stage
  • 2 x 5687 high mu dual triode as driver stage providing voltage gain
  • The 845 vacuum tube is transformer-coupled to the load
  • Output transformer wound with special audio coating
  • Quiet torroidal power transformers; choke filtered power supply
  • Highest quality parts throughout with point to point wiring
  • Detachable Power Cord System
  • Control Functions: Power On/Off
  • Power Output: 28W x 2, RMS 1kHz
  • Total Harmonic Distortion: less than 1% (15W, 1kHz)
  • Frequency Response: (-3db points at 15W ) 5Hz - 47kHz
  • Input Sensitivity: 0.7V
  • Input Impedance: 100kohms
  • Output Load Impedance: 4ohms, 8 ohms, user selectable
  • Signal/Noise: 90db
  • Consumption: 190W x 2
  • Input Interface: 1 group (RCA)
  • Overall Negative Feedback: None
  • Vacuum Tubes (per pair): NOS E88CC x 2, NOS 5687 x 2,
  •                                                  RUSSIA MADE 5AR4 x 4, 845 x 2
  • Warm up Time: 3 minute
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