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At USD$881, this is a solid fair-market price for a 4004 MKII in good condition. These dual-mono powerhouses typically move in the USD$700–USD$1,200 range depending on cosmetic condition and whether they've been recapped; your asking price sits comfortably in the middle, reflecting the amp's enduring reputation for driving difficult loads and its pedigree as a Dan D'Agostino design. If the unit is cosmetically clean and fully functional, this is not a steal but honest pricing for a workhorse that still commands respect among electrostatic and ribbon speaker owners.
Before committing, verify the capacitors haven't been neglected—these amps are now 35+ years old, and original caps are a real concern. Ask the seller for service history and whether a recap has been done; if not, budget another USD$300–USD$500 for professional work to ensure reliability. Also confirm the toroidal transformers hum quietly (low hum field is a design hallmark, but age can change that) and that both channels measure equally at idle. Make sure the original manual and any warranty documentation come with it; these details matter for long-term ownership of vintage gear this capable.
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.
See all Aragon listings on RADAR.
