I bought this amp for the looks. I have never seen such a vacuum tube as before. I've been using it for about 6 months. I'm still using the included FU32 bulb. an op amp using an LM4562 that I had on hand. Sounds really good. I installed it in my office. I drive a pair of DIYAudio Amp Camp monobloc Class A amps (6 watts each) and a pair of vintage Radio Shack die-cast aluminum speakers. I listen to Sirius XM and Revain Music through an Andover Audio Songbird streamer, which I plug into the input of this preamp. I am very satisfied with the sound of this near-field listening setup.
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