Robert Harley has posted a review of the Constellation Audio Altair II preamplifier ($9000) and Hercules II monoblock power amplifiers ($180,000/pair) at The Absolute. His conclusions:
“The Constellation Audio Altair linestage and Hercules monoblock amplifiers in their updated version maintain their status as world-class references. They are a convergence of beautiful design and build-quality, practically unlimited power delivery, and, most importantly, state-of-the-art sound.”
You can read the full review here.