IWISTAO FU50 Small 300B 2x8W Vacuum Tube Amplifier Finished Board Kit Single-ended Class A DIY Free Tuning
IWISTAO FU50 Small 300B 2x8W Vacuum Tube Amplifier Finish...

Vacuum tube FU50 is known as the small 300B and close to tube 300B, but the price is much lower than tube 300B, its treble is fine, extension is very good, overtone is excellent, and the vocals are very cordial. Listening to the original sound of the Dream of Red Mansions can feel that it is super strong; listening to symphony and string music is very good, violin is very delicate, more worth playing than the tube EL34. 

 

IWISTAO FU50 Vacuum Tube Amplifier 2x8W Single-ended Class A PCBA Finished Board Small 300B DIY

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