By Kalman Rubinson, Stereophile
Context
In his review for Stereophile, the author approaches the NuPrime MCX-800AD not as a conventional AV product, but as a purpose-built multichannel integrated amplifier for high-resolution and immersive music playback. Rather than decoding or processing surround formats internally, the MCX-800AD focuses on conversion, amplification, and signal integrity across eight channels.
“What it is then is a digitally enabled integrated amplifier. Eight-channel integrated amplifiers are rare, but this is an ideal combination for anyone who wants to play multichannel files on a computer.”
This design positions the MCX-800AD squarely within the growing ecosystem of computer-based playback, external decoding, and high-resolution multichannel music.
Architecture & Implementation
The reviewer details NuPrime’s Fusion-X architecture, noting the use of multiple high-performance DAC chips rather than a single multichannel device, dedicated I–V conversion stages, and independent power supplies. Each of the eight amplifier channels operates in a bridged Class-D configuration, emphasizing current delivery, control, and channel isolation.
The extensive rear-panel connectivity—balanced and unbalanced analog I/O, USB multichannel input, and flexible channel routing—was described as unusually comprehensive for a single-chassis design.
Listening Impressions
The core of the review centers on extended listening across classical, vocal, and jazz recordings in both stereo and multichannel formats. The MCX-800AD is described as immediately engaging, with a presentation that favors coherence and natural timbre over analytical spotlighting.
“As a complete endpoint and amplifier, the sound was excellent.”
On acoustic recordings, voices and instruments were portrayed with warmth and presence, occupying a stable, believable space without exaggerated surround effects.
“All the instruments and voices were clear and warm, delineated with an inviting presence just a few feet beyond the speaker plane.”
At higher playback levels, the MCX-800AD demonstrated ample headroom and composure, delivering dynamic passages without strain while maintaining tonal consistency across channels.
System Context & Comparisons
After a month of use, the reviewer compared the MCX-800AD directly with reference-grade amplification. While differences in spatial presentation were noted, the NuPrime remained competitive in tonal balance, weight, and musical involvement.
“The MCX-800AD was fully competitive… Its voice and instrument rendering was particularly appealing.”
Rather than emphasizing spectacle, the MCX-800AD was credited with encouraging long listening sessions and repeat engagement—often a more meaningful measure of performance for experienced listeners.
Conclusion
The review concludes that the NuPrime MCX-800AD defies easy categorization. Its combination of high-resolution multichannel DACs, eight channels of power amplification, and system flexibility allows it to function as the central component of a serious music-first system.
“It could serve as the electronic core of a complete multichannel audio system much more than competently.”
For listeners exploring high-quality multichannel and immersive music without resorting to complex AV receivers or multiple chassis, the MCX-800AD is presented as a distinctive and compelling solution.