SUNBUCK 5Z3P 6J8P FU50 single-ended tube amplifier small 300B ultra-linear dual-mode 2 stereo 12W vacuum tube amplifier audio
Product parameters:
Working mode: 2.0 stereo single-ended class A vacuum tube amplifier
Output power: 12W+12W(RMS)
Frequency response (-2DB): 20HZ-26KHZ
Sensitivity: ¡Â1V
Distortion: ¡Â1% at 1W
Signal-to-noise ratio: ¡Ã93DB
Power consumption: <150W
Application tube: 6J8P*2 FU-50*2 5Z3P*1
Introduction of electronic components:
¡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!
All transformers of this machine are produced by our own factory, and the parameters are consistent. The power transformer of our product (No. 966004) has a power of 200W and is made of high-quality H18 0.35MM thick black annealed silicon steel sheet. The power transformer is installed horizontally, and it is a work of art without the 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. The effect is much better than H14, H18 silicon steel sheet.
¡Ü2CM thick red sandalwood 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 mirror stainless steel plate, and the lower bottom plate is a 1.5MM thick 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. Machine volume: 30cm wide, 25cm deep, 19cm high (including tube height). Flat scale size, solid and steady (10KG), restrained atmosphere! 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 5Z3P rectification, the filter capacitor adopts national SAMYOUNG electrolysis, with high-power metal oxide film resistance, 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 ohms and 8 ohms. 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.