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US$800 looks fair for this amplifier, landing right on the median of recent comparable listings and well inside the normal used range. It is not a steal, but it is priced like a sensible buy rather than a stretch.
The Reference 6.6 has a solid reputation for big, expressive tube sound with a weighty, musical presentation that pairs well with efficient speakers. If the unit is clean, fully functional, and includes its original remote, box, and any spare tubes or paperwork, it becomes more attractive; at this price, condition and service history matter more than squeezing out a few dollars.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Consonance, a brand under Opera Audio, traces its origins to Beijing, China, where it was founded in 1994 by Shi Hui Liu. As one of China's pioneering high-end audio manufacturers, the company began with tube amplifiers and evolved into a family-run operation that has expanded over three decades. Its philosophy of "Simple. Human" underscores a commitment to original designs and international appeal, with products distributed in over 30 countries.
The brand specializes in a broad range of hi-fi components, including tube and solid-state amplifiers, turntables—where it claims to be China's first high-end producer—digital sources like DACs, electronics, and accessories. This complete line supports full music reproduction systems, blending traditional vacuum-tube warmth with modern precision engineering.
Consonance holds a niche position in the medium- to medium-high-end market, appealing to audiophiles seeking boutique Chinese craftsmanship at premium prices. While praised for innovation and global reach, it remains somewhat obscure outside enthusiast circles, with occasional critiques on build quality tempering its high-end reputation among discerning buyers.
See all Consonance listings on RADAR.
