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Paradigm X Series X-850 AMP Ultra-Class-D Subwoofer Amplifier - Tested & Working
Subwoofer Paradigm ultra 4 views

Paradigm X Series X-850 AMP Ultra-Class-D Subwoofer Amplifier - Tested & Working

USD$990
Location
US
Seller
carolina.consistency
Source
eBay US
Posted
1 Jun 2026
Last seen
18h ago

RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.

Our Thoughts RADAR AI

At US$990, the listed Paradigm Ultra subwoofer is a strong bargain if it’s the UltraCube 10, whose used power-amp-only version often sells around US$290, while full subs typically range US$600–US$900 depending on condition and age. Since the listing price sits below the typical 25th percentile for complete units, it’s an excellent deal for a well-regarded Canadian sub known for tight bass and solid build.

The UltraCube line is prized for its room-friendly design, clean low-end extension, and Paradigm’s reliable engineering, making it a go-to for small to mid spaces. If this is original-owner, includes the original stand or grille, and shows no cosmetic wear, the upside is significant. With no condition flags or missing parts noted, this clean listing at a below-market price is a clear buying opportunity for a fellow enthusiast seeking value without sacrificing performance.

Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.

About Paradigm

Paradigm Electronics was founded in 1982 in the suburbs of Toronto, Canada, by Scott Bagby, a pioneering loudspeaker designer, and Jerry VanderMarel, a consumer electronics veteran. With input from Jerry's brother Bill, they revolutionized speaker design by integrating scientific acoustics research from the National Research Council of Canada and rigorous listening tests. From humble beginnings, Paradigm rapidly expanded, opening its Paradigm Advanced Research Center in 1993 and earning early accolades like the 1990 Best Price/Value Award, cementing its innovative heritage.

The brand focuses primarily on high-performance loudspeakers, including iconic models like the Atom and Monitor series, alongside premium lines such as Signature. Paradigm controls its entire production process in a massive 225,000-square-foot facility outside Toronto, manufacturing drivers, cabinets, and components in-house for unmatched precision. While best known for freestanding and architectural speakers, it has ventured into electronics through sister brands like Anthem, emphasizing value-driven hi-fi without straying into turntables, DACs, headphones, or cables.

Paradigm holds a strong mid-to-high-end position in the global market, renowned for delivering audiophile-grade sound at accessible prices. A bestseller across six continents, it commands significant shares in freestanding (No. 6) and architectural speakers among top integrators. Repurchased by founder Scott Bagby in 2019, Paradigm upholds its commitment to the "Paradigm Sound"—transparent, dynamic audio that punches above its weight, appealing to discerning buyers seeking Canadian craftsmanship over boutique exclusivity.

See all Paradigm listings on RADAR.

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