Dragon & Phoenix FU50 Tube Amplifier Kit
Last night I began my journey into building tube amps by ordering a kit from (play horror music) Aliexpress. I opted for the non-Bluetooth model to simplify things and it cost me $438AU (incl. postage and sales tax). I will report back once it arrives and I start building it.
SPECS: Tubes: 6J8P x 2 / FU50B x 2 / 5U4G x 1
Output Power: 8W+8W
Frequency Response: 20hz-20khz
Output Impedance: 4 ohms and 8 ohms
SNR: 90db
Input Sensitivity: 500mv-1000mv
Input Impedance: 100kΩ
Harmonic Distortion: 1%(1khz)
Size: 320mm(L) 210mm(D) 160(H)
Caution:
Product options are kits, not finished products, you need to assemble yourself, the package includes circuit diagrams and wiring diagrams. Please install it correctly according to the drawing. Please contact me if you have any technical problems. The kit does not come with a power cord.
UPDATE: I just found this useful video series showing construction of this amp 😀
https://www.youtube.com/watch?v=nUK4sOOE7WQ&list=PLnyQFHUSljIpCy0KD6aTbms7K0Mb5Krhx
I have been listening to this amp for one to two hours each day for the past week. There was some distortion but after a while I noticed that it seemed to be at concentrated around certain mid-range frequencies so today I replaced the dodgy Wharfdale Delta 10 speakers I had been using with my much smaller Vaf DC1 speakers. All the distortion vanished and while not as efficient, the Vafs sound so much smoother and cleaner than the Wharfdales. It sounds OK but I will reserve a final judgement on it's sound quality until after I run my main speakers off it.