BOYA Audio Music Fax Bile Preamp MP500 Bile 6922 Tube Hifi Fever Power Amplifier Balanced Bile Preamplifier with Remote Control

MP500 EH6922 Vacuum tube with tone balance biliary prestage

EH6922 Russian tubeThe sound is beautiful, the high frequency is supple, the medium and low frequencies are full at the same time with its strong appeal, the sweet intermediate frequency, the round and detailed sound, the sound field is well positioned, the level is very clear, the analysis is strong, and the music is very good!

First, product introduction:
1. It is designed with a circuit board, making the internal layout more reasonable, clean and beautiful.
The front panel is made of silver 8mm thick aluminum alloy electroplated brushed process panel, blue power indicator tube, and a unique tube display upper cover grid is added, which is of higher grade (see the figure below).
2. Advanced sandblasting paint process pure aluminum alloy 3mm thick box, high-gloss metal knob, pure aluminum alloy large machine foot.
3. Use traditional rotary switching switches to control advanced fully sealed switches with long lifespan.
4. The input signal provides four sets of inputs, gold-plated RCA three sets with balanced NEUTRIK high-end XLR inputs
5. The output signal provides two sets of outputs, gold-plated RCA and balanced NEUTRIK high-end XLR output.
6. The power supply line adopts a three-plug socket, which is convenient for replacing and upgrading the power cord.
Designed with a power grid filter and purification circuit, it can filter out clutter interference and DC components in the power grid.
8, Using antique oil-immersed capacitors and imported polypropylene capacitors such as WIMA.
The power supply uses multiple high-performance, high-efficiency, non-leakage, non-radiation, and non-noise high-end transformers.
10. The original imported electronic tube (pairing) is used, and the original imported high-precision operational amplifier (pairing) is perfectly combined.
The pond filter capacitor and adjustable voltage regulator filter form an accurate filter circuit with good filtering effect and suppress residual noise.
12. The tube filament is powered by AC, which is warmer and more durable than DC power supply, will not cause sound hardening, and at the same time prolong the life of the tube, and also ensure the reduction of the interference of the filament; the four sealed transformers achieve digital-analog separation, power and signal power supply separation, without interference, so that the background is dark and clean without interference.

Russia – former Soviet army supply plantElectro-Harmonix With a rich history and experience in tube manufacturing, selected materials and demanding manufacturing processes, EH provides high-quality, musical tubes for audio enthusiasts and instrumentalists. EH provides tubes for dozens of first-line audio manufacturers today, and is also loved by many audio enthusiastsLow noise, long lifespan, glass is much thicker than domestic and European and American countries, and it feels very heavy in the hand! The sound has density, three-frequency balance, and low-frequency diving is also very good. One word: poison!

Second, performance parameters:

● Size: 430 × 380 × 105mm
● Input impedance: 470K; Output impedance: 470 ohms;
● signal to noise ratio: 110dB;
Frequency response: 5Hz-50KHz (plus or minus 1dB);
● Distortion: ≤ 0.001%;
The net weight is about 9kg, and the packaging weight is about 10kg.

The design is mature, the sound quality is outstanding, and the performance is stable. The machine can be connected to a pure post-amplifier, or it can be combined with the machine as a tone adjuster to further improve the sound quality and enrich the detailed performance.

Third, product pictures:

Four sealed transformers achieve digital-analog separation, power supply and signal power supply separation, without interfering with each other, so that the background is dark and clean without interference.

Fever film capacitor, imported tube 6922,High precision resistor, Ina,ON regulator, German Weimar capacitor, original imported Alpine potentiometer for tuning, shielding silver-plated wires and other fever devices, escorting sweet and good sound quality,The dual op amp is designed for audio, with a FET input high-performance audio operational amplifier. It has low distortion, low noise, high signal-to-noise ratio, and high bandwidth. It is widely used in high-quality audio circuits and other circuits that require first-class dynamic performance. It provides a large dynamic range and a very small offset voltage. The operating voltage range can be from ± 4.5V to ± 24.0V, with only 0.0003% distortion at 1KHz, a slew rate of 25V/μs, and a gain bandwidth of 20MHz.The sound is mellow, round, neutral and warm, and the taste is strong. It is known as the operational amplifier with the most tube sound and color, and the favorite of audio enthusiasts.