Just got this amp, and still think it's one of the best single ended amps I've ever heard. Great bass, instrument separation and warmth. I'm selling all my gear at the moment though due to financial reasons. My loss is your gain. This amp has been babied by myself and the previous owner, it's in great shape and works flawlessly. It is the version without the build in dac. Selling to move fast at the lowest ever Opera price of $490 shipped and paypal fees included.