These amps are in mint condition. Conservatively rated as 8. I can not find any scratches or flaws and have had very little use. As one reviewer put it "The 500MB combines the resolution, harmonic completeness, and warmth of tubes with the bass control, dynamic power, and high frequency extension that have been province of solid-state" that sums it up. With 500 watts per channel into 8 ohms and 1000 watts into 4 ohms, the Carys have, for all practical purposes, plenty of power to drive almost any speaker. I live in the Bay Area and invite local pickup. Buyer pays paypal fees and shipping cost - two 50 lb. boxes. I have original boxes. Please contact me if you have questions.
Also look at my other listing.