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The Aragon 4004 MK II is a classic dual-mono powerhouse renowned for dynamic authority, incredible bass control, and exceptional build quality that defined high-end solid-state audio. The US$899 asking price sits just below the US$907 75th percentile and near the US$881 median from your database, making it a fair and competitive offer for this sought-after amplifier.
This listing represents a worthwhile buying opportunity because the 4004 MK II delivers 400W into 4 ohms with extended highs and tight low-end control that pairs brilliantly with demanding speakers like Magnepans. At US$899, buyers secure a well-loved, high-current amplifier with proven reliability from its TO3 transistors, avoiding the US$5,400 new retail price while gaining a unit that has stood the test of time over two decades.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Aragon emerged in the mid-1980s as a bold American audio brand under Mondial Designs, with its inaugural 4004 amplifier launching in 1987 and the iconic 8008 following soon after, forever altering high-fidelity sound reproduction through innovative engineering like the signature V-notch heatsink. Founded with a no-compromise ethos by leaders including Tony Federici, it prioritized pure sonic performance over gimmicks, setting industry trends rather than chasing them. Acquired by Klipsch around 2001-2006 and later shuttered, the brand was revived in 2009 by U.S.-based Indy Audio Labs, which relaunched it in 2013 with modern updates while honoring its heritage.
The brand focuses squarely on high-performance power amplifiers, exemplified by the 200Wpc dual-mono 8008 and premium Iridium monoblocks, alongside sophisticated processors like the Soundstage preamp capable of audiophile-grade decoding for Dolby Digital, DTS, and beyond. All products are designed and handcrafted in the USA, emphasizing fully decoupled power supplies, IC-free signal paths, and robust machined aluminum construction for superior thermal management and durability.
Aragon holds a revered position in the high-end market as a vintage-inspired powerhouse for discerning audiophiles, blending timeless reliability with contemporary software-upgradable features like Ethernet control. Its reputation for unadorned excellence—beautiful, powerful, and easy to operate—earns consistent praise from outlets like The Absolute Sound and Stereophile, appealing to buyers seeking reference-level amplification without excess.
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