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Spectral is a bit of an enigma in the high-end audio world. Although nearly 20 years old and one of the founders of the American high-end audio industry, Spectral isn't a name that comes quickly to mind when considering the best of the best in high-end.

Spectral's low profile is of their own choosing. They advertise very little, their products are demonstrated in a small number of stores, they almost never send products to magazines for review, and they are very quiet about their accomplishments.

Today is March 22, 2020. Outside my door, the plague is gaining intensity. People are wearing masks and rubber gloves. But outside the window by my desk, there is a Callery pear tree, and every day its blossoms are becoming more intensely white. Each day its brightness (measured in units of luminous flux) increases noticeably. The optical radiance of its zillion-petal whiteness illuminates the whole garden.

There are some standing jokes in the audio industry about the qualities a piece of equipment must have in order to be truly "high-end." One definition is that it must be unavailable, unreliable, and dangerous. Another is that it will sound great, break, and its manufacturer go out of business. By meeting at least half of these variables, the Spatial Coherence TVA-1 preamplifier qualifies as a classic audiophile product.

During the four years that I've reviewed for Stereophile, I've had the privilege of evaluating products from some of the world's best-known audiophile companies: Audio Research, Bel Canto, CH Precision, dCS, D'Agostino, Dynaudio, EMM Labs, Jadis, Krell, Nordost, and Wilson, among others. But one long-standing manufacturer whose exhibits at audio shows invariably inspire ecstatic reports, Germany's MBL, has remained outside my purview.

I've been wrestling with my elders about new ways to measure loudspeakers, lobbying for methods that might correlate more directly with a listener's experience. And wouldn't you know? Right in the middle of this Socratic dialogue, I put the fresh-from-UPS, $1000/pair, Tannoy Revolution XT 6s into my reference system, plunking them down on my 24" Sound Anchor Reference stands in the same spot my Harbeth P3ESRs had been sitting. And I freaked! I was using the Rogue RP-7 preamp and the Rogue Stereo 100 (100Wpc) amplifier, and I could never adequately describe how bad the shiny white Tannoys sounded. Imagine sound that's thin, metallic, herky-jerky, dull, and rolled off completely below about 90Hz.

Jazz collecting has an archaeological aspect to it; it's one of my favorite aspects of the hobby. Far more than most other genres, jazz evolved over its first several decades, and it did so on record. Every musician was distinctive, changed from session to session, and interacted with other musicians in ways specific to the ensemble, the time, the place, and the mood. Every record, live or from a studio, is a snapshot of where jazz was precisely then and there. You can get to know musicians' styles, and with practice, you can really hear what's going on.

Achieving room-filling, high-quality sound in a hotel room is difficult enough. Getting it in a cavernous ballroom is even more problematic. Yet, over the past few years at AXPONA, RMAF, and most recently at the February 2020 FLAX (Florida Audio Expo), Von Schweikert Audio, in association with The Audio Company of Marietta, Georgia, has managed that—and, other than the approximately 100 bodies occupying every seat in the house, they've done it without any room treatment, or without any that I could see.