Cyber-20 is the first high-end tube headphone amplifier produced by Opera Audio. It uses two EL84s connected in single ended triode mode driven by a single 12AU7.
A separate power supply using the LC filter is used.
All connections are via point-to-point wiring. It is worth mentioning that Cyber-20 is the first tube headphone amplifier in China that uses an output transformer.
The selectable output impedance of the output transformer is effected by a switch on the front panel. With this switch, the amplifier can match headphones with impedance ranging from 10 to 600 ohms. This allows users of high-end headphones to choose from many different headphones on the market.
The dual headphone output makes it easy for two listeners to enjoy music together under the same conditions for easy comparison. The top of Cyber-20 is covered in solid African rosewood. With its cute outlook and small size, an ideal complement to its warm, transparent and powerful musical performance.
OVERVIEW:
Specification
- Control functions: volume, gain switch (low / high), power on / off
- Output Impedance: (Low) 10-200 ohms, (High) 200-600 ohms
- Output power at 1kHz: 1W x2 RMS
- Bandwidth at -3dB: 20Hz - 40kHz (1W)
- Signal / Noise: 90dB
- Input Interfaces: 1 group (RCA)
- Input Impedance: 50k
- Input sensitivity for rated output: 900mV
- Output interfaces: 2 groups (6.5mm microphone jack)
- Consumption: 26W
- Vacuum tube: EL84x2, ECC82x1
- Dimensions: 190 (L) x 145 (W) x 112 (H) mm
- Weight: 9kg (packed)