Audiophilepure

The Quark is not just another top notch product from Synergistic Research. Build quality, ergonomics, and sound performance have set new bench marks for my system and my digital front end. Roon and all its fabulous features makes it a very attractive package that will have you appreciate even more about your favorite music. The ability to customize the sound to your specific taste is a huge plus. Whether your preference is for digital or analog or both, the Quark should be a strong consideration as you seek out the very best in high end audio. Highly recommended!

Proper Perspective And Caveats

It cannot be overstated that system synergy and personal taste are critical when evaluating high-end audio components and music. These reviews are based on my subjective listening priorities, my specific system configuration, and my specific listening room. This combination is only one data point of many that exist out there for my components and the music that is played. Please consider my comments and analysis appropriately

Since the very beginning of stereo, audio systems have traditionally been configured by choosing the loudspeakers first. But experience shows that the power amplifier holds the cards when it comes to having the greatest influence on the sound of your system. The best speakers demand the finest amplification, and anything less is a recipe for disappointment. Yet pair your favorite speaker brand’s smaller offerings with Constellation amplification, and unbelievable magic is made.

What impressed me most was the absence of significant compromise. Too often, all-in-one products excel in convenience while falling short in sonic performance. The MOON 371 largely avoids this pitfall by delivering a level of musical presentation that would not feel out of place in a system composed of separate components.

Its neutral tonal balance, strong dynamic capabilities, excellent imaging, and comprehensive feature set make it a compelling centerpiece for a contemporary music system. The inclusion of HDMI ARC, phono capability, extensive streaming support, and a robust software ecosystem further enhances its appeal.

At $6,500, the MOON 371 is unquestionably a premium product. Yet its thoughtful engineering, outstanding build quality, comprehensive functionality, and consistently engaging sonic performance make a compelling case for its asking price. Within the category of all-in-one streaming integrated amplifier, it is difficult to find a more accomplished or better-rounded product. For listeners seeking a sophisticated, no-compromise integrated solution that can serve as the heart of a reference-quality music system, the MOON 371 deserves serious consideration.

The platter itself uses a dual-layer construction. A non-magnetic SUS316L stainless steel main platter is paired with either an A7075 Extra Super Duralumin or TP340 pure titanium upper platter. The two are permanently vacuum bonded into a single, highly rigid structure, with the different materials providing distinct mechanical characteristics while preserving structural integrity.

Supporting the entire assembly is the Monotube Oil-Damped Spring Suspension, a refined evolution of the design introduced with the Air Force Two. A precision spring operates within a sealed, oil-damped chamber, while a free-floating piston regulates movement and dissipates unwanted energy. This arrangement effectively isolates the platter from external vibration, allowing it to settle with composure and maintain a stable, controlled platform for the stylus.

https://www.audiophilia.com/reviews/2026/6/18/the-ps-audio-aspen-fr5-loudspeaker

Jane’s Addiction’s “Mountain Song” from the album Nothing’s Shocking is not just a power-chord masterpiece. At the 3-minute mark, the solo begins, and Dave Navarro’s bends seem otherworldly. There’s a degree of separation without too much sibilance that you can always hear in the recording; this is perhaps because of the bass in these monster speakers. When I compared my Alyssa speakers to the FR5, I could hear the tuning for the Alta Audio component to be of the soft-silk side of the sound, whereas the FR5’s have a more pronounced neutral sound; the Alyssas still had a little more pop in the highs. The neutral side of the FR5 (though the bass was always present) was more welcoming to some of the music I played than the Alyssa (which almost doubles the price). I’ll give a few examples.

In the last few years, Mary Halvorson has become one of my favourite artists; her sound is original, the layers of her compositions are volatile, and their unpredictability shows her mastery of the instrument. She just recorded an album with Ambrose Akinmusire, Slo-Mo Neon Luminate Hoverings (2026). I invite you to listen to it. The air of Akinmusire’s trumpet is palpable, and Halvorson’s Guild archtop guitar sings with phrasing that fragments your mind. The FR5’s make this album not just enjoyable, but an unforgettable listening experience. I ordered the vinyl of this recording as soon as I listened to it. The low bass and open mids of the FR5’s draw out the creativity and uniqueness of these artists.