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This article, by Doug Blackburn, originally ran when Positive Feedback was in print - Vol. 6, No. 4, 1997. There is so much stuff going on here lately I'm beginning to think I could write a 1-man magazine. But that might not be as interesting as PF's Assembly of the Diverse so I'll compress my thoughts... Read More »

Jack Bybee's iQSE or internal Quantum Signal Enhancer (iQSE) differs from the AC Purifiers I wrote about last month. As you'd expect the signal from your component runs through the AC Purifiers. It is with some bother I note no signal passes through the iQSE, it neither plugs into anything nor does anything plug into... Read More »

Stein Music The Perfect Interface,  Pi Slip Stein Music's Pi Interface Sheet under your LP and prepare for sonic improvement most every time. Whether you have a mat or bare surface on your turntable, these superbly designed Japanese paper mats are a bell ringer for sure. Comes in two models:  the Signature White brings nuance... Read More »

A general rule, which I try to follow selecting audio products for my tests and when performing the test boils down to credibility. On the one hand, my own, ultimately, what I write will stay online "forever" and it attests in my favor or against me, and on the other hand it defines a company... Read More »

I have been enjoying quite a lot of audio adventures over the last year or so while doing audio projects where I experimented with various wire types, capacitors, inductors, and resistors in audio circuits. As a result, my knowledge, skills, and confidence related to developing, modifying, and optimizing audio circuits have been progressing to where... Read More »

The Critical Mass Systems QXK Mk. III Rack in Four-Shelf Configuration, photograph courtesy of Critical Mass Systems. The latest chapter in a story… Some designs and products that I review are from new companies. This is a very good thing; it shows that the world of fine audio remains vibrant, creative, and open to innovation.... Read More »

Stein Music's "The Perfect Interface" Carbon Signature Resonance Control mat in place on our EMT 948 turntable. Every now and then I receive a product whose benefits are so obvious, and whose design is so straightforward that there's no point in holding back or trying to write an extended essay. It isn't a complicated call,... Read More »

So yeah, I like to dabble in tweaks and stuff that might add that much more to our musical enjoyment. Something that gets us that such more from our music. I admit it, I am a junkie for such things. People who have visited here look at the system and comment about its complexity and... Read More »

Bybee filters. These things have been available for audio in various iterations for nearly twenty years, as far as I can tell. The filters are said to employ some of the technology used to reduce the noise floor of military submarines to improve sonar performance. I first read about these in the early 2000s, if... Read More »

Greetings from the underground, fellow music lovers and seekers after audio nirvana. As I may have conveyed in my last ruminations many, many moons ago, I am luxuriating in the aural glow of an extended series of incremental tweaks, which coming as they have, in drips and drabs, have brought me to the point where... Read More »

An issue or two back, I wrote enthusiastically about the grounding units from Entreq (HERE), and how these passive grounding boxes allowed me to hear way more into the music. Yeah, they work as advertised and for sure, they should be seen as a requisite addition to anyone who is serious about audio and their... Read More »

This is probably not the first and neither the last time you shall read a similar introduction to the review of this type of product from Rogoz Audio. I believe, however, that some things are worth repeating again and again. Those who are already well aware of the role of anti-vibration elements should just skip... Read More »

In which our hero meditates… What a year it's been. As I observed in the first of these "Brief Impressions" articles, on the Oppo Sonica (HERE), there have been so bloody many products and projects here at PF Central in 2016 that I'll be writing from here until the end of the year to cover... Read More »

So if you have been following my ramblings over the years (of which I tend to ramble—hence the title of my column) it is obvious that one of my goals with our system is to minimize noise. Not my music per se, since much of it is noise, but the noise that rides in the... Read More »

"Take him hence; to the rack with him! We'll touse you Joint by joint, but we will know his purpose." William Shakespeare, Measure for Measure The Stillpoints ESS Reference Rack with Grid Shelves (image courtesy of Stillpoints) Fine audio reviewing can be great, with passion driving you through the work and all the costs that... Read More »

So in my last Audio Ramblings, I wrote… "Not sure how this came about, but man do I have a lot of stuff here to review… the PS Audio BHK250 amplifier and their AC12 and AC5 power cables, the Aurender N100H streamer, the Entreq Poseidon Grounding box and cables, several items from Synergistic Research (Black... Read More »

Audio Vault USA is a relative newcomer to the world of audio equipment racks designed for use in high end systems. Audio Vault USA was founded a year ago by Dave Vincent. Dave is the President of Audio Vault USA and Dave is a mechanical engineer.  Dave and James Wall who works for Audio Vault... Read More »

Usually, I come to a review with foreknowledge about a product and a set of basic expectations. In this case, I had no first hand prior exposure to Furutech or experience with high-end power receptacles. A very long time ago, before cell phones and audio websites, I replaced the original duplex of my typical post-war... Read More »

Since converting my digital playback chain to a heavily modded Mac Mini/Mytek Stereo 192 source (read review HERE) I've been very happily listening to a variety of 16/44 and hi-res files. For once I couldn't think of any upgrades that I really needed. But when I read an ad for the Audioquest JitterBug, it resonated with... Read More »