Octave Audio Jubilee preamplifier
Way back in the age when Stereophile's print magazine was the size of a theater playbill, common wisdom declared that the tube preamp was the ideal complement to solid state amplification.
Audacious Audio
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CH Precision C10 D/A processor
It takes audacity for a company that already builds one of the finest DACs on the planet, which is already expensive, to set out to build one that's so much better that it warrants an extra digit in the model number and a much higher price tag. But then CH Precision has never lacked audacity.
Unison Research Reference monoblock power amplifier
In high-end audio, Italian designs play by different rules. They tend to favor beauty over austerity, boldness over caution, and emotion over restraint. Rather than just hearing the music, you're meant to be swept away by it. That spirit animates gear from Unison Research, a tube-focused company located just north of Venice.
Diptyque Reference loudspeaker
"Panel speakers that do bass? Sign me up!" That was my reaction when I first heard a pair of Diptyque Reference loudspeakers, at AXPONA 2023. The Reference is a 6'-tall, French planar magnetic speaker whose designers, Gilles Douziech and Eric Poix, make no secret of their love for Magnepan, the Minnesota company famed for its dipole panels. The French duo has improved on Magnepan's pioneering technology by addressing the number-one shortcoming of such designs: a lack of low-frequency extension.
Innuos Nazaré server/streamer
In ancient times, when I first ventured beyond playing files stored on a USB stick or NAS to streaming from Tidal and Qobuz, I ran a USB cable between a MacBook Pro and my DAC. For playback software, I alternated between Amarra, Audirvana, and—sometimes with a dCS DAC—dCS Mosaic.
Treehaus Audiolab The Preamplifier
Imagine navigating the hectic rooms of an audio show at which a sea of similar-looking, similar-sounding gear blends into a predictable thrum, drawing a chorus of familiar nods. Then you stumble into the room occupied by Rich Pinto and his Treehaus Audiolab components. Here, the expected evaporates, replaced by designs that offer something different, both inside and out, sparking curiosity among jaded journalists and seasoned listeners.
Magico S5 2024 loudspeaker
I have lost track of how many loudspeakers I have measured with DRA Labs' MLSSA system since Stereophile started accompanying its reviews with measurements in the late 1980s, but it must be close to 1000. Most of those speakers have long since faded from my memory, but there are some whose excellent measurements stick in my mind. One such is the Magico S5 Mk.II I reviewed in February 2017.
Pathos InPoL Legacy integrated amplifier
Back when gasoline had lead in it and amplifiers came with circuit diagrams in the back of the manual, there was an unspoken understanding that power meant weight. A professional camera was a Graflex Speed Graphic or a Hasselblad 1000F, built like a small battleship and nearly as heavy. Powerful car engines were cast-iron V8s with cylinders you could stick a fist in. And of course, serious amps had transformers that could double as boat anchors.
These days, amplifier design often emphasizes efficiency. Class-D amps in particular have come a long way. Many are terrific, and they're undeniably practical. But there's still something uniquely satisfying about a design that prioritizes timeless expression over economy of electricity or space.
The Pathos InPoL Legacy, a class-A design, is unapologetically massive and so gloriously overbuilt that moving it requires a tactical plan and a chiropractor.
Audio Note AN-E/SPx Ltd. Field Coil loudspeaker
Stemming from the foundation of Kondo Audio Note of Japan, Peter Qvortrup's Audio Note UK is, for many, a custodian of the definitive audio heritage. The debut of each Audio Note piece sparks obsession among adherentsardor that outstrips mere fandom.
Boulder 1151 monoblock power amplifier
For several decades—from well before I toured the Boulder factory in 2016—I've wanted to get a handle on the best sound the now41-year-old company can offer. Multiple listening sessions at shows had more than hinted at excellence. But neither my time in Boulder's large, dedicated music room, which was intentionally dry, nor exposure at various hi-fi shows left me convinced that I'd heard Boulder's full potential.
My first opportunity for an in-home audition came in 2021, when I reviewed the 866 stereo integrated amplifier ($17,500 with DAC, $16,000 without). But that entry-level (by Boulder standards) product, which Senior Engineer Jameson Ludlam said was released to build brand awareness and expand the company's reach by offering "a more accessible product that provides the features we think many people are looking for with the performance they have come to expect from Boulder," only provided a peek at the excellence I expected Boulder to achieve.
So when a last-minute review cancellation opened space to review the just-released Boulder 1151 mono power amplifier ($47,000/pair), I thought, "At last!"