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Adventures at the Far End of Reality


This article by Roger S. Gordon originally ran in Issue 8, August/September 2003, so while we call this section "New Old Stock - Articles from Our Days in Print" you are also going to see some articles from our early days of going online. Random surfing on the Web can produce interesting results. It was... Read More »


Puron AC Power Conditioners, Distributed by Vera-Fi Audio


There are two recent observations I've made in high-end audio: 1) There are a plethora of relatively inexpensive devices that can add significantly to your enjoyment of music and video playback, even if those devices may appear to be incapable of making a difference. Also, 2) The number of "audio enthusiasts" who dismiss the perceived... Read More »


Divine Acoustics Galileo Anti-Vibration Feet


Premier Divine Acoustics is a Polish specialized company, founded in 2003 by Piotr Galkowski. It’s core business are loudspeakers, but the lineup also includes an anti-vibration platform, anti-vibration feet and loudspeaker cables. Divine Acoustics products are in-house developments, significantly different from other products of those kinds available on the market. We are Premier testing its... Read More »


IsoAcoustics Gaia I Footers


Advanced Audio in Tacoma, Washington was the first high end audio shop I ever walked into. There I was introduced to the Linn LP 12 turntable, Vandersteen speakers, Meitner amplification, and several other iconic pieces. One day the shop owner had a pair of Martin Logan CLS speakers set up in the main listening room,... Read More »


Waters on the Hardware: Brief Notes on the AudioQuest HDMI Noise-Stopper


Dean Waters at PAF 2023 (photograph and image processing by David W. Robinson) Here's a neat little product that aims to solve not one, but two challenges we face in our setups. The HDMI Noise-Stopper plugs from AudioQuest are metallic 'blanks' that are designed to fit over any unused HDMI ports. The primary objective here... Read More »


Neurochrome Purifi 1ET400A / Hypex NC500 Input Buffer


Hi Folks! Not in your typical fashion here but I have a quick review based on a module meant for the DIY folks. See, I've been on a journey to build my own amplifiers using *gasp* Class D modules readily available from a few different sources. I've built ICE-based amplifiers, some nondescript "chip amps" (which... Read More »


Kryna Helca 1 and Helca 2 Passive RFI/EMI Filters


Kryna Inc. was established on 21st May 1980 in the city of Machida-shi, which is part of Tokyo Metropolis. Its CEO is Mr. Ryoka Ina who employs only five people. The company offers both cables and vibration reducing products. We are testing an untypical product, the Helca 1 and Helca 2, RFI/EMI and vibration filters,... Read More »


Fono Acustica FAL-2 Cable Lift


There's no getting around it, cable lifts are controversial. With so many competing designs and theories all claiming to remediate the same issues—mechanical vibrations, interactions between wires, and RFI/EMI contamination—sorting them out can make your head spin. One company says the best RFI solution is lifting the cable with a minimum of mass, coming close... Read More »


Origin Live Gravity Weight


Image courtesy of Origin Live Audiophiles include people from a smattering of all spectra on the human scale, from the rigorously scientific—show me the data—to those who rely simply on their own experience, and those who take in others' opinions as their own. I'm largely in the second category but occasionally find myself in the... Read More »


The Carbide Audio Multi-Axis Vibration Isolator Footers Get It Right


I am convinced that, as a species, we are hardwired to respond with awe at sheer displays of power, largesse, and the overwrought, and I was reminded of that again when I arrived home to a UPS delivery of 12 Carbide Audio Multi-Axis Vibration Isolator Footers totaling 60-plus pounds enclosed in a 2' x 1'... Read More »


Audio Ramblings and the Telos GNR 5.1 Plus+ Active Grounding Box


Telos has been around for quite some time. I reviewed their active grounding unit in 2016 after hearing it being demoed ion the Positive Feedback Hospitality room at THE SHOW.  Impressed by what it did to the music being played, I ended up buying the demo unit and we have been living happily ever after.... Read More »


Confessions of a Setup Man Part 12: Failed Experiments


Re-published from Copper magazine, Issue 133, and used by permission of PS Audio. Many audiophiles are tinkerers. We're constantly striving to squeeze the last iota of performance out of our audio systems, or we just like to putz with stuff, or we're obsessive-compulsive. Tinkering often involves experimentation. And (cue evil horror movie laugh), the experiments... Read More »


Audio Ramblings - the Coherence Systems ADD-POWR Symphony I/O


So, let me pick up where I left off in my last Audio Ramblings… As I had mentioned in the review of the Infigo cable, we have here the rather expensive switch and Ethernet cables from Ansuz, two items from Synergistic Research (the Black Box and the FEQ Carbon), and the Coherence Systems ADD-POWR Symphony... Read More »


The Arya Labs RevOpod Damping Foot


Audiophiles are a compulsive bunch. They will try just about anything and everything when it comes to improving the sound of their systems. One very common recourse for mitigating this affliction is tweaking. Tweaking is a repetitive, at times even incessant activity where fine mechanical or electronic adjustments are made in attempts to achieve a... Read More »


Vibration Issues with Your Turntable? Try A/V RoomService Equipment Vibration Protectors


Concerned about vibrations in your home negatively impacting your vinyl listening experience? If you're like me, you want to extract every bit of performance out of your high fidelity music system, and eliminating unnecessary noise and vibrations is one way to do that.  In a previous system in a former home, I used A/V RoomService... Read More »


Snake Oil and Voodoo: Roger Skoff Writes About the Stranger Aspects of Our Hobby


As you probably know, I'm not just a writer and a long-time audiophile (I and my friends call ourselves "HiFi Crazies"), but a manufacturer of High-End audio cables, originally XLO, now RSX. As such, to some of our HiFi brethren, that automatically makes me and anything I might say suspect. They insist—often based more on... Read More »


Gingko Audio Vibration Control Solution (VCS) Toolkit - Part 2


In Part 1 of this review, I had a great time listening to the awesome but temporarily incomplete Gingko VCS Toolkit, and I was looking forward to receiving the Cloud22 Bases to complete the review. When the bases did arrive I was intrigued to find that Vinh Vu also sent me the new Cloud22 wool... Read More »


Gingko Audio Vibration Control Solutions (VCS) Toolkit - Part 1


I've been a fan of Gingko Audio's vibration control products for a long time. Way back in '08 (remember the sub-prime mortgage crisis?), I reviewed the Cloud 9 vibration control platform for my VPI turntable (HERE). Fast forward 14 years, and I'm still using it. Although I've replaced the rubber isolation balls, it still works... Read More »


Entreq Olympus Infinity T Ground Box And Entreq Eartha Ground Cables


World Premiere Review! A flight of fancy or Grounded in reality? Review By Paul Schumann With this article, Positive Feedback continues its content-sharing relationship with Enjoy the Music where Paul Schumann shares his thoughts on the Entreq Olympus Infinity T Ground Box And Entreq Eartha Ground Cables. Dr. David W. Robinson, Editor-in-Chief I'm so lucky to be married. Not... Read More »


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