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This US$250 asking price sits right at the 75th percentile of recent used listings, making it ambitious but not outright unreasonable for a high-end dispersion compensating module in "AS IS" condition. The median for this specific YOSC DCM-SM-C100% unit is US$211, with comparable listings ranging from US$157 to US$250, so you’re paying top-of-market for a component that corrects fiber-optic signal dispersion in C-band systems.
The upside here is rarity: these modules are critical for maintaining signal integrity in long-haul optical networks, and genuine YOSC units are scarce on the secondary market. If you’re restoring or upgrading a legacy OLT or fiber plant, this module delivers precise -167ps/nm compensation that analog crossovers can’t match. The only caveat is the "AS IS" label—verify it’s tested for power and optical throughput before committing, since failed dispersion units are hard to replace. At US$250, it’s a fair buy for a working system, not a bargain, but the performance upside justifies the price if it functions.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
DCM Loudspeakers is an American speaker brand that traces back to Ann Arbor, Michigan, and is closely associated with founder Steve Eberbach. The name became known in the late 1970s and early 1980s through the original DCM company and its distinctive Time Window loudspeakers, which helped establish its reputation for unusually smooth, spacious sound.
DCM’s core focus has always been speakers, not a full-line electronics business. The brand is best known for floorstanding and bookshelf loudspeakers, especially the Time Window family and related vintage models; it is not primarily identified with amplifiers, turntables, DACs, headphones, or cables.
In the market, DCM sits more as a vintage-collector and value-oriented hi-fi name than a current high-end luxury brand. Its strongest reputation comes from older designs that are still admired for imaging and musicality, and today the brand has a niche appeal among buyers looking for classic American speaker engineering rather than mainstream mass-market audio.
See all DCM Loudspeakers listings on RADAR.
