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.

The BBC-designed LS3/5a monitor loudspeaker has been in continuous BBC-licensed production in various forms since 1975. During those 45 years, its popularity has never abated. I bought my first pair of LS3/5a's as a Badger kit from an ad in the back of Speaker Builder magazine.