Description

HIFI Audio Fu19/FU29 Vacuum Tube Amplifier Kit Diy Vu Meter Single ended Hifi Class A Audio Amplifier Bluetooth 5.0 4.8w*2 Notice Fu19 DIY Kit: Fu19 kits without bluetooth, you need to assemble it by yourself Fu19 Finished: Fu19 Finished without Bluetooth Fu19 Finished with BT: Fu19 finished product with Bluetooth Fu29 Finished: Fu29 Finished without Bluetooth When testing the machine, you must first connect speaker. No-load testing can easily burn the output transformer or the tube The kit comes with complete installation drawings, installation wiring diagram Features The signal source can be CD, DAC decoding or computer audio source (the computer sound card must have a line output port), line audio source input, to ensure that the input audio source is pure. Sound description The low frequency is full of volume and strength, the middle frequency is warm, the high frequency is distinct, and there is no split at the very high frequency, the sound details are bright, and the overall control is very good Use the fu19 Class A amplifier circuit driven by 6N2, the output power is 4.8w+4.8w, it is recommended to push the speaker impedance at 4--8 ohms, full-frequency or two-way speakers, and the sensitivity is above 89db. Parameters Output power: 4.8W+4.8WFrequency response: 20Hz--20kHz Input impedance: 100КΩ Output impedance: 4Ω, 8Ω SNR: 90db Input sensitivity: 500mV---2V Amplifier tube After-stage power tube: FU19 Pre-amplifier tube: 6N2 Cat's Eye Tube: 6E2 VU meter: ST-39 (34mm diameter)