1. Product Features:
●The standard version has 5-channel signal input switching function: CD/DVD input; AUX line input; USB decoding input; MM turntable (vinyl record player) input; MP3/PC input. (The currently available A2 version has 1 phono input and 2 analog inputs)
⑴. This machine mainly promotes CD/DVD input and AUX line input. Pure music enthusiasts can be used to connect high-quality audio sources.
⑵ The standard version comes with a USB decoding circuit, which can be directly connected to the computer, shield the low-end sound card (unplug the original sound card to resume work), enjoy the hard disk or online music programs, XP, win7 system free drive, win10 does not support.
(3) The standard version can also connect the output of portable players (such as MP3, MP4, etc.) and computer sound card to this amplifier as amplifying power amplification and connecting speakers to enjoy music.
⑷, the standard version comes with RIAA compensation amplifier circuit, can be connected to MM vinyl turntable, to meet your nostalgic feelings.
● comes with amp output, can be connected to headphones with different impedances of 32Ω-600Ω to enjoy music exclusively (after the headphones are plugged in, the speaker is automatically cut off, it is recommended to match medium and high resistance headphones)
● With 4Ω, 8Ω impedance output matching selection switch, you can choose the best match according to your speaker impedance.
●It can be switched between 110V and 220V power systems to meet the voltage standards of different countries (domestic shipments are fixed at 220V by default, if you need voltage switching or other voltage customization, please specify at the time of purchase).
●All adopt triode connection method, low distortion and more delicate sound.
●Using 6mm thick aluminum alloy brushed panel, high-gloss metal knob.
●Using advanced wrinkle paint process, thin steel box.
●Adopt advanced wrinkle paint process transformer shield.
●The output cow adopts 0.35 thin iron core, the magnetic flux is higher. High purity oxygen-free copper wire is layered and segmented.
●CLC filter is constructed with 2 large pond capacitors and inductors, the background is cleaner.
●The relay is delayed by high voltage for more than 14 seconds (the rectification of the electron tube can only be delayed for a few seconds), which can effectively protect the electron tube and extend the life.
●The transformers are potted with epoxy resin, which is firm, reliable, and high temperature resistant. Please play the role of insulation, moisture resistance, and shock absorption, which can greatly reduce the magnetic coupling generated by the chassis, reduce resonance, and reduce noise.
2. Performance parameters:
●Rated output power: 13W×2
●Frequency response: 20Hz--25KHz
●Total harmonic distortion: <1% (1kHz)
●Input sensitivity: 500mV--2000mV
●Input impedance: 100KΩ
●Output impedance: 4Ω, 8Ω
●Signal to noise ratio: 88dB
●Volume (width×height×depth): 340×160×230mm
●Weight: about 10.75Kg
●Front stage tube: 6N3×2+6N1 (A2 version is 6N1×2+6N3) Rear stage power tube: FU-50×2
Three, real pictures:
A2 version of the picture:
A photo of a tube camera taken by a user's friend:
The original model FU-50 standard version uses a silver-white aluminum alloy panel front view:
The standard version uses a plated black aluminum alloy panel front view:
4. Special instructions:
●FU50 tube adopts antique tube produced by Beijing Electron Tube Factory, with high stability and reliable quality. However, due to the fact that the Beijing factory has switched to discontinued production of electronic tubes, all of them are used to produce stock tubes. Some of the electronic tubes are outdated due to poor storage, but they are all unused. Please do not confuse them with disassembled old tubes. We use this tube mainly because of its simple appearance, but its reasonable sound design is not inferior to many other high-priced tubes. It really achieves the best sound quality with less cost, which is more suitable for the majority of wage earners.
