Product details:300B This mysterious vacuum tube has a long history. 300B is a female voice representative. 6F3 pushes 300B. The low frequency is deep and powerful, the middle frequency is rich and full, and the high frequency is not harsh. I believe this product will shock you
300B This tube is the best way to reflect the original atmosphere of music, because the tube's characteristic curve distribution is excellent, coupled with the second-harmonic sense of hearing, the mouth shape of the singer, the low-frequency tension of the chest resonance , The 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 rich. Musicality.
The 300B kit launched by our company has unique acoustic and electrical regulatory concepts from the design to the selection of the output transformer. The 6F3 side door composite pipe is equivalent to a 12ax7+6p14. Because of the huge inventory, the price Low cost, but the performance of the tube is extremely excellent, especially when connected to a 3-pole tube, the output internal resistance is particularly low, and the linearity is good. It is not a problem to drive 300B.
This machine is driven by the antique famous tube 6F3 (6BM8) composite tube, whichever is fine (0.8MA, U: 55 small signal amplifier transistor 6SN7 needs 3-4maU: 13-15), and the dynamic range is large (-11v, u :10 driver stage 6sn7-6v, u:13), strong driving force (110vpp) enough to feed 300B (-70v), reduce distortion, and noble sound will come naturally!
High-performance packaged output transformer, using complex technology and high-tech design, using British imported Red Bull iron core 86*45, selected high-quality enameled wire (or pure silver wire winding, the cost of each machine is increased by 3,000 yuan ) Numerical control drying, vacuum dipping, moisture-proof packaging, refined into
Adopt a reasonable wiring layout, purely manual scaffolding, reduce the distributed capacitance, and make the high frequency expansion wider. Reasonable foreign old brand tonic accessories. This machine has been sounding for a year. It is recommended not to change or upgrade any pipes. Because we do not do business, I only pursue sound (only limited to more than 10 single monthly shipments per month) , Because the above accessories and the whole machine have been tuned to a sound limit level, what we sell is sound, what we sell is technology, and what we convey is the spiritual culture of music
Sound characteristics:
The high frequency is slender, the intermediate frequency is full and mature, the low frequency dives deeply, and the tension is full
Parameter:
Power transformer: 105*70 upgrade British Red Bull iron core (250W)
Choke: Upgrade 76*50 British Red Bull notched iron core
Output transformer: 86*45 (upgrade British Red Bull iron core)
300B tube: Linlai tube HI-FI golden foot
Push tube: Old Shanghai 6F3 (6BM8)
Rectifier tube: Nanjing 5Z2P*2
Function: 20 seconds of high-voltage delay (to prevent the rectifier tube from flashover)
300MA monitoring ammeter (can monitor the working status of the machine at any time)
Distortion: <1.5% (1kHz)
Frequency response range: 15HZ-28KHZ
Input sensitivity: 200mV
Input impedance: 50-100KΩ
Output impedance: 4Ω, 8Ω
SNR: 87dB (In order to ensure the charm of 300B sound, pure AC power supply is used, and no noise can be heard beyond 20CM from the speaker. If DC power supply can reach 90DB)
Power consumption: 150W
Working conditions: temperature: 0 degrees -40 degrees
Working power: 8W+8W
Size: 450*230*200 (mm) width * depth * height
List:
6F3+300B tube amplifier x 1
