RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
The Polk RM10 system, often paired with the RM1000W or a similar powered unit, features a 10-inch subwoofer, usually with a built-in 50W RMS (100W-200W dynamic) amplifier. It is a compact home theater subwoofer designed for 32Hz-250Hz frequency response, featuring a 10" Dynamic Balance Composite cone and variable Driver: 10-inch Long-Throw Woofer.Power Output: 50 Watts Continuous (RMS) / 100-200 Watts Dynamic Power.Frequency Response: 32Hz - 250Hz.Enclosure: Bass-Reflex / Ported design.Controls: Variable Low-Pass Filter, Volume Control, Phase Switch.Inputs/Outputs: RCA Line-Level input, Speaker Level input/output.Key Features: Auto ON/OFF sensor. Fully tested in excellent condition comes with RCA cable
This US$95 ask on a Polk RM10 power sub from the '90s is a clear bargain against the typical used market, where recent comparables clock in at a median of US$199 (25th percentile US$105, 75th US$600). For a black RM10 in unknown condition, it's undercutting even the low end, making it a steal if it checks out—vintage Polk subs like this hold value for their punchy, musical bass in small setups.
Before biting, verify the driver cone isn't split or delaminating (common on 30-year-old units from foam rot or overdriving), and test for clean amp operation without hum, buzz, or thermal shutdown. Insist on the original power cord and any grilles; missing bits drop resale value fast. Power it up in person if possible.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Polk Audio emerged in 1972 from the inventive spirit of three Johns Hopkins University graduates—Matthew Polk, a physics major, George Klopfer, and Sandy Gross—in Baltimore, Maryland. What began as a modest venture building public address systems for local events evolved into a dedicated speaker company after an initial contract fell through, leaving the founders to sell their redesigned cabinets directly. Fueled by passion for music and hi-fi innovation, they secured Small Business Administration loans, relocated operations, and rapidly scaled production, hitting $1 million in revenue by 1976 and earning a spot on Inc. magazine's list of America's fastest-growing private companies.
The brand has long focused on loudspeakers as its cornerstone, pioneering models like the Monitor 7 series for balanced dynamics, deep bass, and high-volume performance that bridged European refinement with American power. Polk expanded into automotive audio through partnerships like MOMO in 1999, while maintaining a core lineup of home speakers, including innovative SDA technology for enhanced soundstaging. Though not delving into amplifiers, turntables, DACs, headphones, or cables, their emphasis remains on reliable, high-fidelity transducers engineered for generations-spanning accuracy.
Polk Audio holds a solid mid-tier position in the hi-fi market, prized by enthusiasts for value-driven performance sold through specialty stereo shops and big-box retailers like Best Buy. Once publicly traded on NASDAQ in 1986 before going private in 1999, the brand now operates under Sound United, upholding its legacy of accessible excellence without chasing ultra-high-end exclusivity or vintage obscurity.
See all Polk Audio listings on RADAR.
