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Dirac Live room correction system full version: $499; Stereo version: $349
Of course, the sound quality is dependent on the hardware in the system, says KR, but the acoustic transformation capabilities of DLRC are well beyond what is built into most processors. (Vol.37 No.5 WWW)

MartinLogan PBK Kit: $119
An adaption of the formidable Anthem Room Correction system used in Anthem's Statement D2 processor, the PBK includes USB cables and a microphone and will work with up to four Paradigm subwoofers. While easier to use and considerably less…

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Audio Research Tube Damping Rings: $5 each
Damping rings for all AR products are now available to the public at large. They're made of a proprietary polymer material that converts kinetic energy to heat, and their improvements are not subtle, exclaims BJR: tighter, cleaner, deeper, more dynamic bass; more coherent transient attacks; crisper, more extended highs; plus "improvements in the reproduction of subtle gradations of low-level dynamics." Give 'em a whirl—the cost is minimal. (Vol.23 No.2, Vol.26 No.8)

AudioQuest binding-post wrench: $17.95
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AcroLink 7N-DA2090 Speciale: $2375/1.5m pair
The less-than-snappily named 7N-DA2090 Speciale is technically laudable; commendably, AcroLink publishes the specs for this product's resistance (18milliohm/meter) and electrostatic capacitance (56pF/meter). It's made of 99.99999% pure multistrand copper, arranged in what AcroLink calls a "balanced twin core structure." According to MF, substituting the AcroLink interconnect for his TARA Zero Evolution "produced sharper but not unnaturally defined transients, shorter sustain and decay, and an overall well-detailed and more…

I vividly recall walking back to Times Square with John Atkinson while talking about amplifiers…

Description: Remote-controlled, network-connected D/A integrated amplifier with Dirac Live LE Room Correction, tone controls, multiroom capability, and front-panel touchscreen. Analog inputs: 1 pair RCA (line), 1 pair XLR (line), 1 pair RCA (phono). Digital inputs: 2 TosLink, 2 coaxial S/PDIF, 1 AES/EBU (XLR), 1 HDMI/ ARC, Ethernet (RJ-45), Wi-Fi, Bluetooth aptX HD. BluOS supported file formats: MP3, AAC, WMA, OGG, WMA-L, ALAC, OPUS, MQA, FLAC, WAV, AIFF. Supported sample rates: up to 192kHz with bit depths 16–32. Supported cloud services: Spotify, Amazon Music…

Digital sources: Oppo Digital UDP-105 universal disc player, Baetis Prodigy X PC-based music server running JRiver Media Center v26 and Roon, Pink Faun 2.16x Linux-based music server running Roon, Mytek Brooklyn, exaSound e38 Mark II and Okto DAC8 Pro D/A processors. QNAP TVS-873 NAS.
Preamplifier: Audio Research MP1.
Power amplifiers: Benchmark AHB2, Classé Sigma Mono.
Loudspeakers: Revel Ultima2 Studio (L/C/R), Revel Performa3 F206 (SL/SR), 2 JL Audio f110v2 and 1 JL Audio e110 subwoofers.
Cables: Digital cables: AudioQuest Coffee (USB).…

I measured NAD's Masters Series M33 using my Audio Precision SYS2722 system (see the January 2008 "As We See It"). Usually, before I test an amplifier, I precondition it with both channels driving a 1kHz tone at one-third power into 8 ohms for an hour. This thermally stresses an amplifier with a conventional class-AB output stage, but as the NAD is a class-D design, this wasn't necessary. However, before doing any testing I ran the M33 for an hour to ensure that it was fully warmed up. At the end of that time, the top panel was slightly warm, at 100.7°F/38.2°C.…

In 2006, Weiss founded Oswalds Mill Audio (OMA), manufacturer of a range of high-end loudspeakers and other products with exotic, vintage-inspired approaches and designs. Serious handcraft and bespoke materials, from solid hardwood enclosures to leather from luxury makers Hermès and Jean Rousseau, are behind OMA's upper-echelon pricing.

Stereophile readers might not be familiar with his speakers, for a couple of reasons. Weiss doesn't do audio shows (at least he hasn't for…