Integrated Amp Reviews

Nuvistors—miniature, small-signal, vacuum tubes made of metal and ceramic—were introduced by RCA in 1959, at the dawn of the transistor revolution. RCA used them throughout the 1960s in its New Vista line of television sets, mostly in the tuner section. But by the early 1970s, solid-state devices had all but replaced tubes, nuvistors included (with a few notable exceptions). Ampex based the electronics of its well-regarded, late-'60s MR-70 open-reel tape deck on nuvistors, which were also used in microphone preamplifiers—in both cases for their very low noise and reputation for reliability and long life. For a time, Conrad-Johnson used them as well. While nuvistors may seem exotic today, they're hardly rare. On eBay you can find for sale hundreds if not thousands of used and new-old stock (NOS) nuvistors, as well as nuvistor sockets, without which the tubes are less easy to implement. (But they can be, and often are, hard-wired into a circuit.)

My girlfriend, "bb," a 6'-tall Aries artist, always says, "Math, science, religion, and even history, are all simply stories we tell ourselves about our experiences with a phenomenon we call energy."

My father, Herb Senior—the Deacon—always said, "The fundamental nature of the universe is vibratory—everything we experience is just waves!" He explained that waves—possessing power, amplitude, and frequency—are the basic building blocks of our reality. The universe actually "works" and is "comprehensible" because these waves are not random, but organized into exponential intervals called octaves. Our job, he told me, was to recognize and study this mathematical (and mystical) nature in action.

It's a shame that bb and the Deacon never met.

As an audio scribe, the fiercest demons I wrestle are beliefs—yours and mine; those of my friends, my editors, my fellow reviewers; and those of the engineers and promoters of the products I write about. Sometimes the force of these rabidly held and (mostly) conflicting beliefs paralyzes me with self-doubt: What do I know? What makes me qualified to listen and judge?

I find small humans more beguiling than big people. My favorites are the two-footers—those little two-year-old boys with a kind of wobbly, bent-kneed stride that dips like a blues song every fourth step as they stagger ahead of their watchful parents. I like three-footers too—sprightly three-year-old girls who dress better than their moms and never need a lifestyle consultation. Whenever we see one of these cheerful, bouncing young'uns coming toward us on the sidewalk, I smile and my dog's tail wags. Their bright faces and excited voices make me think, You go, little sprouts! These miniature humans' special beauty is that they still possess their full force de vie.

The more integrated amps I review, the more I want to tell manufacturers: Please, skip the DAC, omit the phono stage, lose the Bluetooth—just give me the best sound quality, and the most vivid, most transparent line stage and control center (with pre-out) you can design. Make sure this line stage has appropriate gain, and high input and low output impedances. Give me at least four balanced and single-ended inputs. Make sure the volume, balance, and tone controls are durable and degrade the sound as little as possible. That way, I can add a DAC, server, phono stage, or Bluetooth, of any quality level, any time I choose.

It was spring. I was planting kale and cabbage, wearing bib overalls, and listening to Pigboy Crabshaw (aka Elvin Bishop) on my iPhone. My girlfriend, "bb," came out, and just stood there laughing. "What's this? American Gigolo: The Alabama Years?"

Now, please, don't start worrying about your newest Stereophile reviewer. I've owned my share of Julie London and Jennifer Warnes records, but these days I'm more into Hazel Dickens and Maybelle Carter. It's summertime, fish are jumpin', and that dirt-road American music is getting me high.

Once, on a cold, dank, soundless day deep in the Eastern bloc, I watched a man spend over a million dollars on an audio system: a turntable, a fancy horn tweeter, a few wires, and some amplification for his modified Klipschorns. I asked him what he did for a living, and he told me he was a notary public.