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Analog Relax EX1000: $17,750
The top-of-the-line cartridge from Japanese company ZOOT Communication has a higher output voltage and a higher output impedance than typical moving coils. Nevertheless, not only did MF find that the Audio Relax was a superb tracker; he also wrote that "Velvet Fog" Mel Tormé had never been better served on record than through the EX1000: "The sonically sensual vocal presentation oozes 'velvet' without sounding at all soft, warm, or muffled, nor does it sacrifice transient articulation. This cartridge gets more of that correct…

AcousTech The Big Record Brush: $36.95
With grounding wire: $52.99
This large-handled brush has soft bristles of both natural hairs and conductive synthetic fibers, and makes dusting LPs nearly foolproof. The 5.5"-wide bristle area easily spans the width of any LP's grooved area. Version with ground wire ($52.99) does "a pretty effective job of dissipating static electricity," Mikey said. (Vol.31 No.9)

Acoustical Systems Arche 5D headshell, Regular: $799
Acoustical Systems Arche 5D headshell, Lite: $899
Acoustical Systems Arche 5D headshell,…

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Antipodes K50: $17,500
The made-in-New Zealand K50 works with Roon as both server and player, Roon as a server with Squeezelite or HQ Player as the player, or Squeeze as a server and Squeezelite as the player. It offers Ethernet, USB, I2S, AES3, and S/PDIF outputs, though the manufacturer doesn't recommend using USB. JVS found that the Squeeze server and Squeezelite apps were not as user-friendly as Roon, but using them to transmit the audio data via single AES3 to the dCS Rossini DAC "delivered the most transparent, detailed, color-saturated, vivid…

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Bel Canto e1X: $6800
The Roon Ready e1X DAC/Control Preamplifier offers AES3, coaxial and optical S/PDIF, digital inputs, and USB and UPnP/DLNA-compatible Ethernet ports. (The USB and Ethernet ports support MQA-encoded data and DSD data in the DoP format.) There are also line-level and MC/MM phono analog inputs, these converted to digital so that they can be adjusted with the DSP-domain Tilt, Bass EQ, and volume controls. The e1X features line outputs, a headphone output—the Tilt and BassEQ controls are not operative with this output—and a subwoofer…

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Naim Mu-so 2nd Generation: $1799 with standard grille fabric
This slim, all-in-one, Roon Ready networked music system has a tweeter, a midrange unit, and an oval-shaped woofer for each channel, all powered by direct-digital, class-D amplification. The integral DSP offers three room compensation settings. There is also an alarm and a sleep timer. The major digital streaming services, including Spotify, Tidal, and Qobuz, are handled natively, and the Mu-so also offers AirPlay 2 (iTunes and Apple Music) and Chromecast. There are analog, S/PDIF, USB,…

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exaSound s88 Mark II: $7599
See "Digital Processors."

exaSound Sigma Streamer Mark II: $750
To those who already own an exaSound DAC, the exaSound Sigma Streamer offers an affordable and tidy alternative to the company's PlayPoint digital-source components. The simple Sigma, which streams via wired or wireless LAN, is a Roon-ready endpoint, can function as an HQPlayer network audio adapter, and is compatible with UPnP, OpenHome, and AirPlay protocols. It supports PCM to 32/384, DSD to DSD256, and MQA (full unfold). KR found the…

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Audio Research Reference 6SE: $19,500
An updated version of the discontinued Ref 6, with changes in capacitors and wiring, the fully balanced, tubed '6SE impressed JVS, who noted that when he installed the Ref 6SE in his system, his speakers "poured forth some of the most polished, transparent, and arresting sound" he'd heard from his system. Longer-term listening, however, indicated that the Audio Research preamplifier was sensitive to setup issues. Once he had optimized everything else in his system—cables, footers, stands, AC supply—JVS could report that…

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Bel Canto E1X: $6200
Trickled down from Bel Canto's premium Black line, this slimline, lightweight amplifier uses the well-regarded Ncore class-D modules and a low-noise switch-mode power supply. TG commented positively on the e1X's image specificity, low-frequency control, and extremely low background noise. "I didn't expect to be so completely gobsmacked by the level of clarity and musicality I'm hearing now from the e1X," he concluded. JA's measurements revealed that the Bel Canto easily exceeded its rated output powers of 250Wpc into 8…

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Boulder Amplifiers 2108: $56,000
When he reviewed Boulder's flagship 2008 phono preamplifier in 2002, MF concluded that "it's hard to believe that, for some time to come, any [phono preamp] will equal or surpass the monumental performance of Boulder's 2008." Almost two decades later, the new two-box flagship replaces the 2008's three power supplies with four: left, right, logic, and an independent standby supply. The through-hole components and boards have been replaced by surface-mount equivalents, and the circuitry features…

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ampsandsound Bigger Ben: $5600
This single-input, single-ended, triode-wired, no-negative-feedback tube amplifier drives both loudspeakers and headphones. It offers approximately 8Wpc into 8 ohms and 5Wpc into 32 ohms (when equipped with a solid state rectifier and KT88 output tubes). With 6L6GC output tubes, when it maxes out at 3Wpc, the Bigger Ben powered Zu Soul Supreme speakers "to greater levels of transient and timbral exactitude . . . than most any other amp I've tried," wrote HR. With DeVore Orangutan O/93s, HR found the Ben…