As most of you know, the Sophia Electric 91-01 300B mono amplifiers that I reviewed for Positive Feedback Online back in January of 2011 reignited my interest in SET amplification, because they made incredibly beautiful music with my Tannoy Westminster Royal Special Edition loudspeakers. Richard Wugang, the President of Sophia Electric, just sent me a [...]

As I mentioned in my last post on upcoming reviews, the Fab Four of Mhdt Labs: Mouse, Horse, Dog, and Tiger, sent me their Stockholm V2 USB DAC to review for Positive Feedback Online. As you know, I’ve reviewed both the Mhdt Labs Paradisea+ and Havana for Positive Feedback Online, and I’ve really liked what I’ve heard. You [...]

A while back, fellow audio enthusiast Pete Riggle of VTAF fame brought over a one-off deHavilland / Chaffee Engineering Model 222 tape-head amplifier that Kara Chaffee had added a phono section to specially for Pete. Here’s Pete’s description of it during a little phono stage shootout he did: “The first of these phono stages is the [...]

I’ve been busy reviewing Hi-Fi gear of late, and I’m entering into an even busier time on the review front in the coming months. As I schedule my reviews out into the future I do it on the basis of the order I receive things in, so the list below could change a little for [...]

My Sophia Electric 91-01 300B mono amplifiers are sounding like a vintage dream this morning: rich, warm, colorful, and extremely musical while listening to the Stan Getz & Joao Gilberto Getz/Gilberto album reissued on 45 by Analogue Productions. Certainly a great part of the splendor I’m hearing is contributed by the Sophia Electric Royal Princess [...]

Sue at Sophia Electric mentioned that she thought the Princess™ Carbon Plate 300B Vacuum Tube ($600 USD per matched pair) would really complement the coaxial drivers in my Tannoy Westminster Royal SE loudspeakers, and asked if I would like to borrow a pair to listen to. You bet I would – thanks Sue! It also turns [...]

When I reviewed the Sophia Electric Model 91-01 300B mono amplifiers for Positive Feedback Online back in January 2011 – which I purchased after the review – they came with NOS vintage Chinese JAN grade 5Z3PA rectifiers (which you can generally substitute for 5U4G and 274B rectifiers). I am just now realizing how good these rectifiers are [...]

Happy Friday everyone! After drinking a couple cups of coffee this morning, I decided to warm up the Hi-Fi rig and do a little tube rolling in the Fi 300B mono amplifiers, which is a great way to have little fun on a Friday morning! My Fi 300B monos came with Sovtek 5AR4 rectifiers (far [...]

It’s Sunday morning here at Jeff’s Place, with the morning sun streaming in through the East windows, while I’m drinking a fine cup of coffee, and listening to an old Analogue Productions test pressing of Bill Evan’s Waltz for Debbie that is just blowing my mind. Those Analogue Productions test pressings are freaky good, and [...]

After I outed Pete Riggle’s new Out Our Way audio diary webpage on his VTAF/Woody web site in my July 6th post, I sent Pete a message saying: “If you have time, I think it’d be fun to hear your system (it’s been ages!), shoot some photos, hear what you’ve been up to lately, and if it’s [...]