Stromtank S-4000 ProPower MK-II XT computer-controlled battery power source
In my enthusiastic 2022 review of the Stromtank S-1000 ($16,900), I described the Stromtank as a computer-controlled lithium iron phosphate (LiFePO4) battery array that, coupled with its AC inverters and all the trimmings, supplies clean, constant, stable off-grid AC power to hi-fi components. By softly depressing a single button on the front panel, Stromtank owners can easily switch from wall-connected mode (when the Stromtank's dimmable front-panel meter is blue) to a disconnected, battery-only state (when the meter is green). At the end of a listening session, users can return to blue mode to recharge the battery array.
Sutherland Engineering Phono Block monoblock phono preamplifier
Saying that Sutherland Engineering builds a nice line of phono stages is like saying that the Porsche 911 Carrera is a nice line of sports car. The Sutherlands all share common design philosophies, features, and sonic attributesbut just as ramping up from Porsche's classic Carrera Coupe ($78,000) to the GT3 ($115,000) or the Turbo S Cabriolet ($172,000) increases the level of performance and distills the Porsche experience down to its essence, ascending the Sutherland line from the PH3D ($1000) to the 20/20 ($2200) to the Hubble ($3800) buys more of what Ron Sutherland is all about.
Symphonic Line Kraft 400 monoblock power amplifier
Things didn't start off auspiciously. I'd been after Symphonic Line's Klaus Bunge for more than a year to send me the Kraft 400 Reference monoblocks. Finally he called. He said he was going to be in town for a few days, and he had with him a pair of what he described as his "traveling" Kraft 400s, which he proposed to leave with me.
T+A MP 3100 HV G3 multisource player
When auditioning a new audio component, I invariably start with some ideas about what I should listen for, based on my preconceptions about the pitfalls and propensities of products in its category. For example, with digital, I'm listening for sound that's awake and unprocessed. With every component, I start by hoping I can spot their colorations and assess their level of importance.
T+A Solitaire S 530 loudspeaker
I jumped at the chance to review T+A's $47,900/pair Solitaire S 530 loudspeaker for a few reasons. First, because T+A is a well-established company with an approach I like and respect: They make hi-fi equipment of the highest quality but with prices that, though substantial, are in line with their technology and execution. Their stuff is very handsome with impressive industrial design, but T+A doesn't do audio jewelry. What's more, though T+A is aggressive in R&Dtheir "Company" webpage says, "Actually, we're scientists ..."but they are selective in the use of new technology. The third reason I was interested in reviewing a product from T+A is that their prices and technical level place them in a market segment I know well.
What I didn't know until recently is that T+A makes loudspeakers, and they're quite different from the loudspeakers other companies make. I only learned this when I started hearing about the S 530 and its larger sibling, the S 540, from friendsfriends whose ears I trust.
TAD C600 line preamplifier
In the early 1970s, Stereophile's founder, J. Gordon Holta man I used to describe, with all due respect, as having been clothed by the haberdasher to the homelesssaid that Audio Research's SP-3 tubed preamplifier was "the closest thing available, in fact, to the ideal straight wire with gain" ie, it would amplify the signal without editorializng in any way. Back then, the SP-3 cost $595. Today it would cost around $3500. But TAD's C600 dual-mono, solid-state, balanced preamplifier costs more than 10 times that: $42,000.
TAD Compact Reference CR1 loudspeaker
High-end audio is in some ways a dynastic beast, though without as many "begats." One of the world's most successful loudspeaker manufacturers in the years following World War II was the Wharfedale company, from Yorkshire in the North of England. Wharfedale was founded by Gilbert Briggs in 1932, who in the 1950s handed over the reins of Technical Director to fellow Yorkshireman Raymond Cooke. Cooke left Wharfedale in 1961 to found KEF Electronics Ltd., where he subsequently appointed Goodmans designer Laurie Fincham as Chief Engineer in 1968. Fincham led a team of young engineers, including Mike Gough, who eventually joined B&W, and Yorkshire-born Andrew Jones, who became KEF's Chief Engineer in 1989, before Fincham was lured to Harman's Infinity division, in Northridge, California, in 1993. Jones followed Fincham across the Atlantic, where he worked on Infinity's Prelude, Overture, and Reference Series speakers, before joining Pioneer in 1997. The Japanese company had established a state-of-the-art speaker-design facility in Southern California, and Jones was invited to lead the design team.
TAD Evolution One loudspeaker
I had been anticipating getting to audition a pair of TAD loudspeakers in my system since the introduction of the original TAD Model-1, in 2003. It was designed by Andrew Jones, who had recently assumed the mantle of chief designer at Technical Audio Devices Laboratories (TAD), at that time a subsidiary of Pioneer. Although TAD dates back to the mid-1970s, its research and development efforts had been focused on the professional sound market, something that continues. Jones came from a long line of speaker innovators at KEF and was assigned the goal of developing state-of-the-art speakers for the domestic market.
TAD Grand Evolution One loudspeaker
Review samples of some new high-end audio products do not grow on trees. They are more like dray horses trouping from one destination to another. After the US premiere of the Technical Audio Devices (TAD) Grand Evolution One (TAD-GE1), a floorstanding speaker from TAD's Evolution series, at the 2023 Capital Audio Fest, the review pair came to stay with me in Upstate New York for a couple of months before traveling on to the 2024 Florida Audio Expo for another public appearance. After that, they returned to John Atkinson for measuringthen off again on another journey.
The TAD Labs GE1 is a three-way, three-driver design. Up top is TAD's proprietary Coherent Source Transducer (CST), a 5½" coaxial tweeter/midrange driver. Two matched 7" woofers fill out the middle of the front panel.
Tannoy Churchill loudspeaker
Really Big Hi-Fi came to live with me for a couple of months this past spring in the form of a pair of Tannoy Churchill loudspeakers. They were trucked directly to San Rafael, California from Kitchener, Ontario, in flight cases so bulky they could double as coffins for NFL offensive linemen. Once ensconced chez moi, the Tannoy dreadnoughts provoked bewilderment, alarm, curiosity, envy, admiration, awe, and amazement in all who heard and saw them.