SUNBUCK FU50 6J8P tube power amplifier 0 noise small 300B super linear 2 stereo 12W single-ended class A HIFI vacuum tube power amplifier audio
Product parameters:
Working method: Stereo single-ended class A
Output power: 12W+12W
Frequency response (-2DB): 20HZ-28KHZ
Sensitivity: ¡Â1V
Distortion: ¡Â1% at 1W
Signal-to-noise ratio: ¡Ã96DB
Power consumption: <150W
Application bladder: 6J8P×2 FU-50×2 5Z3Px1
Weight 10KG
Size: 30cm wide, 25cm deep, 19cm high (including tube height)
¡¼Material Description¡½
¡ÜThe wiring terminal is pure copper gold-plated, the volume knob is beech log knob, the Japanese ALPS 16 potentiometer, the power switch is 2A 250V high-quality stainless steel angel eye with LED light switch!
¡ÜOur product`s power transformer (No. 966004) has a power of 200W, and is made of high-quality H18 0.35MM thick black annealed silicon steel sheet, which is quiet and has low temperature rise. The power transformer is installed horizontally and is not covered by a transformer cover. The 16W output transformer (No. OP864201-2) is wound with a 3-clamp 2-winding method, and the 86*42 iron core is made of Z11 silicon steel sheet with a thickness of 0.35MM from a Japanese original disassembler. The magnetic permeability of the Z11 sheet will be higher, and the low frequency will be lower.
¡Ü2CM thick red walnut log chassis, the wood is dried, polished and painted, with rich texture, simple and beautiful! world! The upper top plate is a 1.5MM thick lacquered iron plate, and the lower bottom plate is a 1MM thick punching iron plate. The advantage of using a metal top and bottom plate is that it can isolate some clutter interference! The wooden chassis is simple and elegant and works well with the tube amplifier. Size: 30cm wide, 25cm deep, 19cm high (including tube height). It is very suitable for use as desktop audio and upgraded computer audio. Meet the listening needs of 20-30 square meters of space.
The electronic tube shop adopts j-level precision matching products: two Dawning 6J8P and two Beijing FU-50, the power rectifier adopts Dawning 5Z3PA rectifier, the filter capacitor adopts national SAMYOUNG electrolysis, with high-power metal oxide film resistor, 5H 0.2A choke The circle (number I573019) forms a multi-level clrc network, which has a strong ability to suppress hum!
¡ÜCoupling capacitor and cathode capacitor: Hong Kong TE MKP film capacitor, the sound is very mellow, the high frequency is thin, not noisy! The 5-ring resistors of the whole machine are all five-ring precision metal film resistors, and the thermal noise is smaller than that of carbon film resistors.
¡ÜThe socket is silver-plated copper socket.
¡ÜThe PCB board is a double-sided high-strength copper clad laminate. The size of the copper foil trace is strictly in accordance with the circuit requirements, and there will be no situation where the current is not enough. The circuit board is grounded at one point, the layout is excellent, and the current sound that often occurs on the circuit board is not used.
¡ÜThe rated output power of this machine: 12w+12w (because the electronic tube has the advantage of strong overload capacity, the actual undistorted output power is equivalent to the 70w+70w transistor power amplifier!)
¡ÜThis machine has 2 impedance output modes of 4 ohm and 8 ohm. It is suitable to choose a small bookshelf speaker with high sensitivity. It is recommended that the box with a sensitivity of 90DB or more within 10 inches and a power of 100W is more suitable. Since the tubes at all levels work in the Class A amplification state, the distortion is small and the hearing resistance is extremely high! The native sound quality is flat, but that doesn`t mean there`s a lack of speed. It can well recreate the strong rhythm of the allegro and modern music in the symphony, but it is not noisy, but a very "cool" feeling. Compared with the 300B single-ended Class A tube amplifier, the tone is less delicate and more lively and free and easy. In terms of strength, it makes up for the lack of 300B tube amplifiers.
¡ÜThis machine has a dual-mode design, and the mode is switched through two toggle switches, and the switch must be switched off in the off state. The pentode mode is dynamic, powerful and slightly faster, suitable for listening to music such as symphony. The triode mode is delicate and tactful, which is more suitable for listening to human voices. In addition, replace the pre-stage tube 6J8P with the Western Electric 717A, and the effect will be improved by a level.