VAC Sigma 170i IQ integrated amplifier

All my earliest hi-fi memories involve tube amplification: as a young girl, staring at the tubes' glowing filaments and listening to music with my audiophile father. I was mesmerized by the glow of those tubes, too hot to touch, but even more so by the music, which often was classical or opera. How those tubes worked was a mystery to me, but I knew they played a big part in the magic coming from the speakers.