For a phono cartridge to generate current and voltage, something must move: a coil of wire (as in a moving-coil cartridge), or a magnet (as in a moving-magnet type), or a tiny piece of iron (a moving-iron type). In those rare cartridges that depart from the electricity-generating principle of the ones described above, it can be a displacement-measuring device in which a moving shutter modulates a light source to vary a supplied voltage (as in an optical cartridge), or one in which voltage is modulated when a tiny chip of silicon crystal is squeezed by a moving element, which varies the chip's electrical resistance (as in a strain-gauge cartridge). But regardless of what it is that moves in a cartridge, something has to.

In the introduction to "Recommended Components" in the final issue in Volume One of what was then called The Stereophile, published in May 1966, founder J. Gordon Holt briefly described his Top-Rated Loudspeaker Systems.

Altec A-7
A highly efficient horn-loaded system for use in large to very large listening rooms (at least 15' from the listening area), or for very high-volume "Row-A" listening. Excellent woofer-tweeter blending, moderately deep (useful 45Hz limit in most rooms) and very taut, well-defined low end. Highs smooth and slightly soft, yielding most natural high-end quality at high listening levels. Middles smooth, rather forward, placing closely miked instruments somewhat in front of the system itself.

I shall always recall fondly the hours I spent shopping for used vinyl at my "local," my favorite Portland, Maine, used record store. If you wanted great-sounding records of great music in very good condition, for just a few bucks, this was the place. My local did not carry much collectible vinyl, but that was okay: I was never really interested in the high-dollar stuff. It wasn't until I moved to New York City that I started to wonder where it had all gone. The proprietor, I knew, traveled the country buying up collections. It was the '00s; he would have encountered many valuable records—so where did they go? He was a total luddite—not the type to sell on eBay, I knew.

It's 2021, and the audio business marches ever onward. Accelerated by the pandemic, economic transformation continues apace; online sales are burgeoning across all industries. This includes hi-fi, which is under pressure to facilitate more online sales, and—maybe, for some—move away from the traditional dealer-based sales model.