Yan Fei 800b advanced gallbladder dilator, equipped with 759 1 push-pull amplifier, has sufficient power. This machine has never been repaired anywhere, and all the original solder joints are brave and noiseless. Yan Fei 800c power amplifier, radio head, singing and playing effect, 759 1 push-pull, the works of Yan Fei company in its heyday, the most comprehensive Yan Fei. The pipeline configuration is extremely luxurious, with 9 12ax7, 5 English guilders and 4 Degen, all of which are Fisher standard and 4 brand-new 7591a.. After long-term aging test, all functions are normal.