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At US$450, this pristine Sonance DSP 2-150 MKIII is an ambitious price, clearly exceeding the 75th percentile of US$350 from our ground-truth database of 97 recent used listings, where the median sits at US$195. While the unit still costs roughly US$1,200–US$1,320 new, paying US$450 for a used model is far from the bargain one would expect when prices dip near the US$100 25th percentile; this listing leans toward the high end of the fair-to-ambitious range rather than representing a strong deal.
That said, the DSP 2-150 MKIII remains a well-regarded amplifier for multi-room and custom integration systems, delivering 150W per channel into 8 ohms and excelling in power efficiency with Sonance’s digital signal processing to optimize speaker performance. Its rack-mountable design, pass-through capability, and pristine condition from a likely original owner add meaningful upside, making it a worthwhile buy for enthusiasts who prioritize reliability and seamless integration, provided they accept the higher price point for such a clean, fully functional unit.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Sonance is an American architectural audio brand founded in the early 1980s by Scott Struthers and Geoff Spencer in Southern California. The company emerged from a simple but powerful idea: that high‑fidelity sound should not compromise interior design. In 1982, Sonance introduced the world’s first in‑wall loudspeaker, effectively creating the architectural speaker category and establishing a legacy built on innovation and discretion.
Today, Sonance is best known for in‑wall and in‑ceiling loudspeakers, outdoor audio systems, and multi‑room audio solutions, rather than amplifiers, turntables, DACs, or headphones. Its product range includes residential and commercial speakers, volume controls, and related electronics designed to blend seamlessly into walls, ceilings, and outdoor environments. The brand’s “degrees of invisibility” philosophy emphasizes clean aesthetics, flexible installation, and consistent performance across diverse spaces, from luxury homes to commercial venues.
Sonance occupies a strong position in the mid‑to‑high‑end custom‑installation market, widely recognized and frequently awarded in architectural and outdoor audio. It is a go‑to choice for integrators, architects, and design‑conscious clients who prioritize both performance and visual subtlety, rather than visible hi‑fi hardware.
See all Sonance listings on RADAR.
