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Editor's Note: We strongly recommend those interested in headphone listening visit our sister website, www.InnerFidelity.com, which is edited by Tyll Hertsens.

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Antelope Zodiac Gold: $3595
Voltikus PSU adds $995. See Digital Processors. (Vol. 34 No.10 WWW)

ASUS Xonar Essence One MUSES Edition: $899
See "Digital Processors" (Vol.37 No.3 WWW)

Audeze LCD-X: $1699
These large, luxurious, circumaural headphones have planar-magnetic drive-units with a thin-film diaphragm energized by arrays of powerful…

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DaySequerra FM Reference Signature Modification: $2800 (+ cost of tuner) ✩
"David Day's Signature Mod effectively addresses this ultimate FM tuner's cathode-ray tube's tendency to burn out. Switching circuitry has been added to allow the CRT to turn off when not needed. The Signature Mod also replaces the tuner's incandescent bulbs with longer-lasting LEDs, and uses hand-matched, low-group-delay filters for lower distortion and better channel separation. LG noted punchy, quick bass response, a deeper soundstage, and a more transparent midrange. "The new CRT's…

APC AV S15BLK: $730 w/battery backup ✩
"The S15BLK is a comprehensive power source, conditioner, and controller that features extensible external power and isolated EMI/RFI filtration for each of its outlet banks. Voltage regulation is accomplished electronically and without the hysteresis or rebound problems of slower, motor-driven compensation. Protected even the heaviest of KR's loads while also eliminating gray colorations and intermittent chassis vibration. "The S15 made the bridged eVo6 into an even better power amplifier—a super amp." (Vol.28 No.9 WWW…

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BSG qøl Signal Completion Stage: $2395
"The qøl Signal Completion Stage is a remote-controlled, solid-state signal processor with four pairs each of RCA and XLR analog inputs and two pairs each of RCA and XLR outputs. With the qøl activated, JA invariably noted a larger overall sound, with a greater impression of the ambience surrounding performers, increased image depth, and better layering within that depth. From JA's measurements, it appeared the qøl process is basically a variant of the well-known Blumlein Shuffler technique. "You must audition the…

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Sound Devices Model 722 portable audio recorder: $2775 ✩
JM raved: "The coolest, most desirable piece of audio hardware I have encountered in a dog's age." The Model 722 is designed as a rugged, high-performance, foolproof, battery-powered portable stereo recorder for electronic newsgathering and video- and film-sound recording. However, with its line-level XLR analog inputs, onboard A/D converters, 40GB hard drive, and headphone amp, the 722 can also serve as a personal stereo. Offers 24-bit recording at up to a 192kHz sample rate. "The apotheosis of…

AI Technology ELGR-8501: $86.47/0.5oz.
AI Technology's ELG-8501 is thermal grease made of more than 80% silver. JM uses a light smear on the mating surfaces of wall-wiring connections to prevent oxidation. He warns: "Never use any kind of silver paste on audio connections such as RCA plugs or amplifier speaker terminals." (Vol.36 No.10 WWW)

Audio Research Tube Damping Rings: $4 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,…

Editor's Note: Rather than place cables in the usual "Recommended Components" classes, we've just listed those cables that members of the magazine's review team either have chosen to use on a long-term basis or have found to offer good value for money. They are therefore implicitly recommended. Where a cable has been found to have specific matching requirements or an identifiable sonic signature, it is noted in the text. "Try before you buy" is mandatory with cables; many dealers have a loaner stock to make this easier.

Interconnects…

These live performances of…

Yesterday, I played a minor role in a dustup on Facebook. It began when a fellow journalist posted a controversial quote from a veteran manufacturer known for generating same. The bait proved irresistible, and a long line of audio mavens, myself included, swam around the hook for an hour or so. The manufacturer himself also waded in, and before the fight was over, he'd made a show of demanding the home address of one of his antagonists, thus raising the manly specter of bodily harm. If there were any…

To fresh your memory, the data on Red Book CDs is limited to a sample rate of 44.1kHz—44,100 samples of data per second—and has a word length of 16 digital bits per sample. This yields a range of 65,536 possible…