HiFi Vacuum Tube with Transistor Hybrid Pre Amplifier 5670 or 6922 Fully Balanced Preamp

Product introduction:

1. Using PCB design, the internal layout is more reasonable, neat and beautiful.

The front panel adopts Silver 8mm thick aluminum alloy electroplating drawing process panel, blue power indicator tube, and a unique electronic tube is added to display the upper cover plate grid, so the grade is higher.

2. High quality sandblasting paint technology, thin steel box, high gloss metal knob, honeycomb type big machine foot.

3. Using the traditional rotary switch to control the advanced fully sealed switch has a long service life.

4. The input signal provides two sets of inputs, gold-plated RCA and balanced Neutrik high-end XLR input

5. The output signal provides two sets of outputs, gold-plated RCA and balanced Neutrik high-end XLR output.

6. The three plug socket is used for the power line, which is easy to replace and upgrade the power line.

7. A filter circuit is designed to filter out the clutter and DC components in the power grid.

8. Antique oil immersed capacitor and imported WIMA polypropylene capacitor coupling are used.

9. High performance R-type transformer is used for power supply with high price (ring type transformer and square type transformer have large magnetic leakage, large radiation noise and low efficiency, while R-type transformer has efficiency of more than 90% and minimum magnetic leakage).

10. The original imported electronic tube and the original imported discrete tube are perfectly combined.

11. The filter capacitor and adjustable voltage stabilizing filter make up a precise filter circuit with good filtering effect and restrain the residual noise.

12. The filament of the vacuum tube is supplied by AC power supply, which is more warm and durable than DC power supply. It will not cause sound hardening and prolong the life of the electron tube. The interference of filament is reduced.

Performance parameters:

Size: 430 * 350 * 100 mm

Input impedance: 100k; Output impedance: 400 Ω;

SNR: - 103dB;

Frequency response: 10Hz -- 50KHz (plus or minus 1dB);

Distortion: ≤ 0.002%;

The net weight is about 9kg and the packing weight is about 10kg.