Beijing Opera Audio is one of the leading Chinese developers and manufacturers of tube amplifiers. Over the past decade, the company has established itself well on the audio equipment markets of Europe and America, and the products of the Consonance series have received well-deserved recognition from the foreign audiophile press. The philosophical concept of "Opera Audio" is expressed in two words - "Simple, Human". It contains the desire to breathe rich musical culture and artistic energy into the cold iron technique, to reveal the original intention and aesthetic content of the music as fully as possible, and thereby provide the listeners with immense audiovisual pleasure. The company's assortment includes tube and transistor amplifiers, vinyl and CD players, network streamers and DACs, speaker systems and "Opera Audio" cables.
The integrated tube amplifier Reference 5.5 has 4 300V lamps at the output. At the entrance, one 12AT7 lamp and two 5687 lamps. One-stroke tube amplifier (two 300V lamps connected in parallel in the channel).
Four linear inputs, gold-plated connectors, high-quality acoustic terminals.
The amplifier has no genre advantages. In the realm of low-power, genre-selective one-stroke amplifiers, it sounds like a "ray of light", maintaining emotionality and transparency by combining one-stroke circuitry with DC output tubes, while not limiting its owner in listening to musical material.

Specifications

Amplifier type: integrated (300B x 4, 12AT7x 1, 12BH7 x 2)
Number of amplification channels: 2
Power per channel (4 ohms) W: 18
Power per channel (8 ohms) W: 18
Frequency range, Hz: 7-47000
Distortion, %: 1%
Signal/noise ratio, dB: 80
Inputs: 4 pairs of RCA/RCA
Outputs: acoustic
Color: silver / wood
Height, mm: 220
Width, mm: 470
Depth, mm: 350
Weight, kg: 30