Tube Preamp Reviews

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Sasha Matson  |  Oct 20, 2023  | 
As I was talking with an audio-retailer friend recently, he reached for a Rolls-Royce metaphor to describe the McIntosh brand. Expensive? Sure, but not as expensive as some boutique high-end products. Fast? Sure, but there are faster things—also bigger things, smaller things, wackier things, and cheaper things.

But when you look at a Rolls or a Bentley, you immediately recognize it for what it is, and you want to sit down in it. And so it is with McIntosh, except you don't want to sit down in it; you want to sit down in front of it, between the speakers of the hi-fi system it occupies.

The C12000 is McIntosh's current flagship preamplifier. It's part of McIntosh's Hybrid Drive series of products that combine tubes and transistors in interesting ways.

Herb Reichert  |  Sep 29, 2023  | 
In red letters on the first page of Chinese audio manufacturer Audio-GD's website are these words: Wisdom in mind, enthusiasm at heart.

I like this goodwill greeting because it sets a mindful tone. I presume that sentiment was issued by one Mr. He Qinghua, because farther down the page, it states, "All Audio-GD's products are designed and developed under the leadership of Mr. He Qinghua." When I began my auditions, I took this salutation as an advisement, making it my plan to study Audio-GD's Vacuum HE1 XLR line-level preamp with as much wisdom as I could muster and the enthusiasm of high expectations.

Ken Micallef  |  Jul 10, 2023  | 
A phenomenon formerly unique to Japan, which in recent years has been emulated in cities around the world, is the jazz café (known as jazz kissa in Japan), where salarymen can find respite from their hectic lives, loosen their ties, and enjoy hi-fi jazz over coffee or a drink. Jazz kissaten are typically charming, smaller shops, traditionally furnished and paneled in beautiful wood, which serve superb artisan coffee in artful ceramic cups.

Such respect for artistry, craftsmanship, and attention to detail—the Japanese word is shokunin—is reflected in many aspects of Japanese life. This is where you find double handrails to accommodate people of different heights, intricate, ornately designed manhole covers, and bento lunch boxes with hand-carved vegetable figurines. While upholding strict conformity to societal norms, the Japanese highly value creative individualism. This shokunin mindset underlies their reverence for artisanal expression—and their love for jazz.

Japanese audio, much like jazz kissaten, reflects the shokunin mindset: craftsmanship pursued with both pride and humility.

John Atkinson  |  Sep 15, 2022  | 
Two high-performance preamplifiers were subjected to further listening in recent issues. Jason Victor Serinus wrote about Rotel's Michi P5 in September 2022; Jim Austin auditioned the Audio Research Reference 6SE in October 2022.
Jason Victor Serinus  |  Apr 01, 2022  | 
Have you ever walked through fresh snow in the woods with all your senses heightened? When I did, shortly before the New Year, it was as if I was seeing nature for the first time, through a fresh lens. Never had white-coated surfaces appeared so white. Nor had shapes seemed so magical. It felt as if I had happened upon a pristine landscape unexplored by human or beast.
Kalman Rubinson  |  Mar 25, 2022  | 
What am I doing with a vacuum tube preamplifier? I haven't owned a tubed preamp since I bought a Sonic Frontiers Line 3 preamplifier at the turn of the century. I set that aside within a few years as I moved into multichannel because multichannel tube-based electronics were, and still are, rare. My last home experience with a vacuum tube was with a PS Audio Stellar M1200 monoblock power amp, which is a hybrid with a 12AX7-based input stage.

John Atkinson  |  Nov 29, 2021  | 
Stereophile often subjects products that have been reviewed to further coverage: sometimes because there was an aspect of performance that needed further investigation; other times because there was a controversial finding. Three recent followups concerned the Ayre Acoustics EX-8 2.0 Integrated Hub amplifier that Ken Micallef reviewed in the November 2021 issue; the Accuphase DG-68 Digital Voicing Equalizer that Jason Victor Serinus reviewed in August 2021; and the Zesto Leto Ultra II line preamplifier that Ken Micallef reviewed in February 2021.
John Atkinson  |  Aug 02, 2021  | 
Stereophile's August 2021 issue contained further looks and listens to two high-performance products: the Audio Research REF 6SE line preamplifier and the AudioQuest Niagara 3000 Low-Z Power Noise-Dissipation System.
Ken Micallef  |  Jan 22, 2021  | 
What sort of audiophile are you?

I think of myself as a critical listener, perhaps a purist, definitely an enthusiast, of music and audio, who enjoys both the journey and the nuts and bolts. I like my hi-fi direct, simple, and personal. Also, I guess I'm a little bit old-school: tube-driven amplifiers with point-to-point wiring; vinyl, preferably early pressings; spun with belt-drive or idler-drive turntables. I listen to digital audio, too—and when I do, I prefer nonoversampling DACs. I like high-efficiency, high-sensitivity floorstanding loudspeakers and prefer them horn-loaded.

Jason Victor Serinus  |  Oct 23, 2020  | 
"As long as you're happy."

That's the line long uttered by the most dreaded members of my family, and their friends, whenever they tried to pry into my personal affairs. Often the last word, "happy," was uttered with a downward cadence and accompanied by a shrug.

Then came the kicker. "You are happy, aren't you?" said with eyes boring into my soul. "Well, as long as you're happy."

Art Dudley  |  Apr 21, 2020  | 
It may come as no surprise that the two Recommended Components issues we publish every year, in April and October, are Stereophile's most popular. Both go hand-in-hand with increases in single-copy sales and subscription requests, and it's worth noting that equipment and record suppliers line up to get their ads into those issues.
Herb Reichert  |  Jun 27, 2019  | 
I am an artist-painter and an audiophile. When I listen to recorded music, I sit in the sweet spot and stare at the empty space between the speakers. And while I listen, I survey and critique the soundfield, as if it were an unfinished landscape painting in my studio.

As I observe the soundstage and the apparitions of musicians within, I notice the dimensions of the recording venue (and/or microphone placement), as well as the physical energy of the entire vibrating illusion.

Herb Reichert  |  Feb 21, 2019  | 
You know I'm a lucky guy. I maintain two separate audio reviewing systems.

The core component of my beloved, daily-driver desktop system is a Mytek Brooklyn DAC-preamp-headphone amp. Through this system I play high-resolution files and Internet sources (Tidal, Qobuz, Netflix, and YouTube). One of the Brooklyn's two line-level inputs delivers NPR news and baseball from my Kenwood KT-990D FM/AM tuner. I mostly use this system with headphones, but currently, the Brooklyn's line-out feeds a pair of Bel Canto Design's compact e.One REF600M monoblocks driving the shelf-mounted Dynaudio Excite X14 speakers I use to play movies and videos.

Michael Fremer  |  Nov 29, 2018  | 
The digital ground seems to shift weekly. While firmware and software updates over the Internet somewhat slow the constant upheaval, when you do buy something, you just know that as soon as you plunk down your cash, something new will come along.

So, especially with preamplifiers, why not produce a design based on modules that the user can swap in and out, to custom-configure the preamp to that user's current needs while leaving room for later expansion? Why pay for six inputs' worth of stuff when at present you need only two? Upgrades? New features? No problem—swap out a module. Or, if a circuit in one module malfunctions, you can send only that module back for repairs, not the whole thing.

Jim Austin  |  May 29, 2018  | 
In the March 2018 issue, Art Dudley admired the sound quality of Ayre Acoustics' KX-5 Twenty preamplifier, but didn't love some of its operational aspects. I've staged this Follow-Up as a putative face-off between the Ayre and my current reference preamplifier, the PS Audio BHK Signature, which I reviewed in the June 2017 issue.

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