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If you read Part 1 of this Soundsmith review series in Positive Feedback Issue 98 (HERE), where I wrote about the new Carmen Mk II phonograph cartridge, you know that I found the Carmen Mk II to be one of the most musically enjoyable phonograph cartridges I have ever written about. The Carmen Mk II... Read More »

Pretty much everyone involved in enthusiast audio has heard of Nelson Pass, and for good reason, as Nelson has been a central figure in the audio design world since the mid-1970s. I asked Nelson if he would tell me a little about his early years, about how he first got involved in music and audio... Read More »

I get emails from audio enthusiasts and music lovers around the world asking for recommendations of a relatively affordable phonograph cartridge that is warm, dimensional, musical, and has relatively high output so you don't have to use an expensive step-up transformer with it to play music. I have found that particular combination of traits in... Read More »

Audio MusiKraft was founded by Guy Pelletier in 2016 in Saint-Jean-sur-Richelieu, Quebec, Canada, and consists of "a small core of experienced craftsmen and devoted music lovers" whose mission is to help their customers get the maximum musical satisfaction from their vinyl collections. Audio MusiKraft's first product—the subject of this review—is the "tunable" Audio MusiKraft Denon DL-103... Read More »

One look at the Arai Lab MT-1 step-up transformer (SUT) and you'll know in a moment that it is a very serious, ultra-quality, audio product. The fit and finish are impressive and impeccable, yet what really stood out for me was the Arai MT-1's considerable size and weight—it wasn't that much smaller than one of... Read More »

I've always enjoyed visiting with Richard and Sue at Sophia Electric about their vacuum tubes and amplifiers, so when Dr. David contacted me about Sue's inquiry to see if I'd be interested in writing about the new Sophia Electric EL34-ST and Aqua 274B vacuum tubes, I said, "You bet!" I'll start with the new Sophia... Read More »

Back in Issue 88 of Positive Feedback I wrote about the Duelund Coherent Audio DCA16GA tinned-copper audio cable that I've been using for building interconnects, loudspeaker cables, and for the internal wiring of my Tannoy Westminster Royal SE loudspeakers' Duelund CAST external crossovers. That was a scant seven months ago, and now due to popular... Read More »

Ever since the first moving-coil phonograph cartridge was developed in 1948 by Holger Christian Arenstein (the Ortofon Mono-A), phono cartridge designers have been working at maximizing & refining the performance of moving-coil cartridges by trying various topologies & materials combinations for the stylus, cantilever, coil wire, suspension, magnets, pole pieces, internal wiring, cartridge housings, cartridge pins, and... Read More »

Acoustic Revive was founded in Japan in 1997 by Mr. Ken Ishiguro, who is the design genius behind the innovative and ultra-quality Acoustic Revive products. Like many hi-fi enthusiasts, Ken-san's interest in audio arose through his love for music as a youngster. Ken-san told me, "I was listening to the Beatles when I was fourteen... 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 »

Acoustic Revive RPC-1 Power Supply Conditioner The intrigue usually starts with a message from Yoshi-san or Elia-san from the MuSon Project in Osaka, Japan, who export Japanese audio exotica to The World. Every time I get a message from Messrs. Hontani I get pretty excited, because long experience has taught me that with their extremely... Read More »

Frederik Carøe in Denmark knocked me out with his amazing Duelund Coherent Audio CAST capacitors, inductors, resistors, and autoformers that I wrote about in Issue 70 and Issue 74 of Positive Feedback as part of the Duelund-Westminster Royal SE loudspeaker project, and now Frederik has done it once again with his superb Duelund Coherent Audio... Read More »

The 12.5-Inch Woody SPU Tonearm™ from Pete Riggle Audio Engineering. If Gustav Stickley (1853 – 1942), the renowned figure of the Arts & Crafts movement in America, were to have made a tonearm to complement his American Craftsman style of furniture, what would it have looked like? I like to imagine that if Stickley had... Read More »

In Issue 78 I introduced you to the remarkable Mr. Shirokazu Yazaki of Tokyo, Japan (above, center, with friends), in my article about the SPEC RSA-M3 Real Sound Amplifier. Mr. Shirokazu Yazaki has been a successful professional audio designer in Japan for over 40 years, and has been involved in the design of many fine... Read More »

There's just something musically magical about the performance of idler-wheel Garrard transcription turntables that keeps me fascinated with them. Certainly the vintage Garrard 301 represents a beloved milestone of turntable design that remains enduringly popular with hi-fi enthusiasts to the present day, and who, like the 1956 Garrard advertisement below suggests, have concluded that Garrard... Read More »

I've really had a lot of fun listening to vintage McIntosh vacuum tube audio electronics in my hi-fi system over the last year. The McIntosh MX110Z tuner/preamplifier, the MC30 monaural amplifiers, and the MC225 & MC240 stereo amplifiers were available as new products during the time period between 1954 and 1969, depending on the model,... Read More »

Most regular readers of Positive Feedback know of my long-time passion for vacuum tube electronics. I've enjoyed the musical prowess and sonic chops of contemporary artisan-designed single-ended amplifiers with various output tubes, like the EL84, 45, 2A3, 300B, F2a, and 845 output valves; as well as inspired push-pull amplifiers using KT88, EL84, KT66, EL34, KT90 outputs, and... Read More »

As many of you know—and as the title reference to "The Acoustic Revive Chronicles" suggests—over the years I've written quite a lot about the innovative Acoustic Revive audio accessories designed by the brilliant Mr. Ken Ishiguro in Isesaki, Japan. In fact, I've spent more time writing about Mr. Ken's Acoustic Revive accessories than I have... Read More »

The Duelund Coherent Audio/Tannoy Westminster Royal Special Edition Project article I wrote for Issue 70 of Positive Feedback was the most fun I've had writing about audio ever!  In that amazing project we took a 'no holds barred' approach to building ultra-high performance external crossovers for my Westminster Royal SE loudspeakers using the exotic, hand-crafted-in-Denmark, Duelund CAST capacitors, inductors,... Read More »