After several hours of usage, the Tiancoolkei Tube-01 continually blows away my expectations! This Tube-01 is the real deal and not a half-hearted DIY vacuum tube project! I am now listening to familiar music, and I can finally say, "this is like vinyl!" It really adds the sweet and warm vacuum tube harmonics to take the edge off digital music, in no small way. As for loudness level, the Tube-01 seems to surpass the 1-to-1 loudness scale as said in the advert. The volume knob also acts as the on/ off switch. For whom is this wonderful gadget? If you are almost satisfied with your desktop hifi setup but need that missing link, the missing piece in your audio jigsaw puzzle - that extra warmth, plus bonus loudness - then this Tube-01 is the one for you. Equipment used: Pocophone F2 Pro, PJ Mioalai A4 Bluetooth tube preamp, Aiyima desktop tube headphone amp, Audio-technica Maestoso headphones, Xangsane ribbon RCA cables, DIY power cord, Audiowalle TP1000 power filter.
Good product and recomended.
Good product and recomended.