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NAD Electronics MDC HDM-2 Expansion Card HDMI add on card for various NAD products using the MDC expansion slots. Used for a few months in a C658 Pre/DAC that was been sold. In perfect, as new condition. Will cover postage within Australia. Condition: Excellent Payment Method: EFT, Cash on pickup Region/State: (SA) South Australia/Australia By double0h 0 Comments Secure Ad AUD $400 Date: June 19, 20241 yr
# NAD MDC HDM-2 Expansion Card (DAC) – Buyer Notes
This is a seller's market for vintage DAC cards; supply is tight and prices have held firm. At AUD 400, this HDM-2 sits above the median of your recent comps (AUD 383), landing closer to the 75th percentile (AUD 390). It's a modest ask—roughly 5% above median—and defensible if the unit shows clean cosmetics and full functionality. NAD's modular DAC expansions from that era are increasingly scarce, so the premium is reasonable, though a buyer comfortable waiting might find a comparable unit closer to AUD 375–380.
Before committing, verify the card reads and locks to all standard sample rates without dropout or noise artifacts. Check that the display and all connectors are clean; these cards can suffer from oxidised RCA contacts and corroded ribbon connectors if stored poorly. Confirm it comes with its original bracket and any documentation. Ask the seller directly about storage conditions and whether it's been powered regularly—dormant cards sometimes need a burn-in period to stabilise.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
NAD Electronics was founded in 1972 in London by a group of European audio importers frustrated with the hype surrounding Japanese hi-fi products. Led by visionary American executive Martin L. Borish and brilliant engineer Bjorn Erik Edvardsen, the company emerged from a quest to deliver high-performance audio at accessible prices. Their breakthrough came with the NAD 3020 integrated amplifier, the best-selling hi-fi amp in history, which embodied a philosophy of stripping away non-essentials to prioritize pure sound quality.
The brand focuses on core hi-fi categories, excelling in amplifiers—pioneering Class A/B, Class G, and hybrid digital designs—alongside integrated receivers, AV processors, turntables, CD and cassette players, and modern streamers. While not venturing into speakers, headphones, or cables, NAD emphasizes source components and amplification that integrate seamlessly into home theater and custom installation setups, always upholding principles of innovation, simplicity, performance, and value.
Today, as part of Canada's Lenbrook Group and sold in over 80 countries, NAD holds a commanding mid-tier position in the market, revered by audiophiles for affordable excellence rather than ultra-high-end excess. Its "Truth in Power" legacy earns cult status among knowledgeable buyers seeking reliable, award-winning gear that punches above its price, blending vintage heritage with contemporary streaming and hybrid tech.
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