Not satisfied with the Most Valuable Product Award, Shengya integrates Sino-German cutting-edge technologies and wants to launch great products. Sino-German Audio Industry 4.0 is here.

In this issue, LEO will continue to interview Mr. He Zhuojian, the founder of Shengya Audio, with Zhang Ge, the editor-in-chief of "Audiovisual Frontline".

Mr. He introduced Shengya's new product PSD-650, which is a dual-channel power amplifier with a power of 1300W. Mr. He also introduced an upgraded preamplifier CV-1, which is made of selected parts from Japan's Furukawa, Czech JJ and German MK, which is very solid.

Finally, Mr. He talked about the comprehensive technical cooperation between Shengya and the German audio industry, and the research and development of cutting-edge audio technology with German doctoral professors. The cooperation has now yielded fruitful results. Mr. He said that a great audio product is coming soon. How great is it, we wait for Mr. He to announce...

Let's first understand the product background information involved in this issue, and then take a look at the interview with Mr. He Zhuojian from Shengya Audio by LEO and the editor-in-chief of "Audio Visual Frontline" Zhang Ge.

Product: Shengya CV-1 tube preamplifier

The preamp CV-1 of Shengya adopts dual mono full balanced amplifier circuit design, and the two channels are completely independent. In order to reduce the dynamic crosstalk interference, an R-type power transformer is used for each channel, and a special transformer shielding box is made to eliminate the interference of power noise.

The input stage consists of 9 12AX7 electron tubes as common-cathode classic circuit amplifiers, and 12AU7 as buffer: the electron tube Class A output buffer with up to 30V undistorted output voltage can easily match various post amplifiers.

The use of electronic tubes, transistors, and integrated circuits form a hybrid constant current shunt high-voltage stabilized power supply circuit. The high-voltage stabilized power supply circuit composed of a variety of active devices makes the sound performance balanced, warm and comfortable, dynamic transients faster, and lower noise .

The signal channel is a cross-connected capacitor for UKP audio, and the imported sealed relay input is selected; the volume controller is a large-scale quadruple high-precision potentiometer made in Japan, which has small channel error, long life, and beautiful sound performance.

The remote control volume and input selection system are added to make users feel more convenient. Extensive use of high-end audio components, such as Japanese Furukawa wires, connectors, Czech JJ tubes, German MKP audio special film electrodeless capacitors, high-precision low-noise resistors, field effect tube servo-type high-voltage precision regulated power supplies, etc., so that the sound quality reaches a very high level , The sound is sweet and natural, and dynamic.

The CV-1 sound is transparent and beautiful, the high frequency is clear, the soft tone and fast speed make it easy for listeners to like them.

The low frequency burst is quite shocking, without any dynamic compression, it is fast and clean, and the sense of volume is very measured, bringing full audio and dynamics.

The high and low frequencies are freely controlled, and the mid and low frequencies have a moderate sense of weight and density. The control, sound field and even the sense of scale are quite excellent.

The preamp CV-1 has a good background tranquility, fine and meticulous sound quality, clear audio and image focus, outstanding sound field reproduction ability, strong dynamic contrast, and outstanding instant response as the stage unfolds in front of us, with subtle changes Can appreciate it.

The voice of the pre-sound CV-1 is natural and soft, and relatively neutral. Because of the relationship between gall and stone, it still maintains its own restorative style in addition to neutral, which can particularly reflect the essence of music.

Listening to vocals will be particularly touching, the female voice is charming and gentle, cheerful and comfortable; the male voice is sincere and honest, softly singing, following the ups and downs of the melody and flowing out the charm and rich details of the music, changing the tune and feelings Extraordinarily expressive.

When listening to the piano, it can easily present the vibration of the whole string and the resonance of the whole piano body. It has excellent analysis and control power and incorporates the courage.

technical parameter

Frequency response: 20Hz-20kHz ± 0.5dB

Rated output voltage: 2V (balanced)

Maximum output voltage: 30V

Harmonic distortion: ≤0.1% (1kHz 2V)

Input sensitivity: 400mV (balanced)

Signal to noise ratio: 85dB (wideband)

Input impedance: 47kΩ

Volume: (W x H x D )446 x 142 x 415(mm)

Weight: 11.5kg