The song Angel from 6F3 drive 300B Vacuum Tube Amplifier

Vacuum tube 300B is a mysterious vacuum tube with a long history, and don’t know how many music fans are fascinated. I still don’t know how many people are struggling to find its real voice. The audiophiles think that 300B is a female voice representative. But our 300B kit circuit is the embodiment of the sound of rigidity and softness. It is not only an attentive and charming woman, but also an iron and tender prince charming.

There are also rumors that the low frequency of 300B is not good. From an electrical point of view, the internal resistance of 300B is only about 800 ohms, which shows its damping coefficient is very good. Why is the rumors so? This is depended on the quality of the power supply, time constant of the circuit design and other reasons.

 

In fact, 300B tube is the best way to reflect the original atmosphere of music, because the tube’s characteristic curve distribution is excellent, coupled with second-harmonic sense of hearing, the mouth shape of the singer, the low-frequency tension of the chest resonance, its dynamics can be said to reach the perfect state, if regardless of the power, hundreds of thousands of transistor world-famous machines are difficult to surpass in the same power range as the 300B. From the acoustic point of view, the sound of the 300B tube amplifier is more expressive and richer, musical sense.

 

Our vacuum tube 300B kit has a unique acoustic and electrical regulatory concepts from the design to the selection of the output transformer.

The vacuum tube 6F3 is a relatively unpopular composite tube, which is quite a 12ax7+6p14 inside. Because of the large inventory, the price is related low, but its performance is extremely excellent, especially when it is connected as triode tube, which output internal resistance is particularly low, and linearity is good, driving 300B is absolutely no problem. In addition, many senior enthusiasts will inevitably ask, why use large loop feedback? This is our consideration of sound and stability. The large loop will sacrifice the transparency of mid and high frequencies. However, in order to improve the weakness of the low frequency of the tube, adopt the large loop can will make the internal resistance of the 300B tube amplifier lower, so that its overall sound balanced.

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Finished Vacuum Tube Amplifier:

IWISTAO Single-ended Tube Amplifier Tube Amplifier Mono-block Integrated West Electric Master 2x8W Vacuum Tube 6F3 Drive 300B 5Z2P Rectifier

DIY Vacuum Tube Amplifier Kits:

Vacuum Tube Amplifier 300B Kit Single-ended Class A No soldering 6F3 Preamplifier DIY Kits HIFI

IWISTAO Tube Amplifier Mono-block Integrated West Electric Master 2x8W Vacuum Tube 6F3 Drive 300B 5Z2P Rectifier

IWISTAO Tube Amplifier Mono-block Integrated West Electric Master 2x8W Vacuum Tube 6F3 Drive 300B 5Z2P Rectifier

It is a dream vacuum tube 300B power amplifier with mature circuit design and handmade. Adopting a special high-performance output transformers, will give you a true 300B tone, slender high frequencies (rich triangle iron harmonics), full mid-range maturity, deep dive at low frequencies, and full tension (the tightness of the drum leather can be felt, and low-frequency dark surge) The ranking of the musicians, expression of the singer, and gesture of playing are fully displayed in front of our eyes. This unit also has a secret weapon, put on the tube cover, the sound is arrogant and dynamic, low-frequency control is excellent, bare tube sound is like lingering and soft, the drizzle in the autumn wind.

This unit is driven by an antique famous tube 6F3 (6BM8) composite tube, and its sound is delicate (0.8MA, U: 55 small signal amplifier triode; if 6SN7, requires 3-4ma,U: 13-15), and its dynamic range is large (-11v, u: 10 driver level; if 6sn7, -6v, u: 13), strong driving force (110vpp) is enough to drive the tube 300B (-70v), reduce distortion, and noble sound naturally comes to life!

At the same time, the high-performance packaged output transformer, adopts a complex process and a high-tech design with imports Red Bull Iron Core 86 * 45 from United Kingdom. Selected high-quality enameled wires, CNC drying, vacuum dipping, moisture-proof packaging, and refining Made.

Also it adopts reasonable wiring layout, purely build a shed, reduce the distributed capacitance, and make the high-frequency expansion wider. Reasonable foreign old-fashioned supplementary accessories, and after one year adjusting sound, it is recommended not to modify or upgrade other vacuum tubes. We pursue perfect sound,  this 300B tube amplifier is already tuned to a sound limit level after assembled above accessories , and it conveys the spirit of music and culture.

More details, please find here 🎵🎵🎵🎶🎶🎶

IWISTAO Single-ended Tube Amplifier Mono-block Integrated West Electric Master 2x8W Vacuum Tube 6F3 Drive 300B 5Z2P Rectifier