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Jul 25, 2025 | 0 comments

The Heart of Push-Pull Power: Understanding Output Transf...

If you've ever delved into the world of tube amplifiers, you've likely heard the term "push-pull" output stage. It's the workhorse design for achieving high power and low distortion. And at the very center of this design lies a crucial component: the push-pull output transformer.

Oct 17, 2018 | 0 comments

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