I suspect that this is a reliable amp! Given that it uses the same design as the renowned "amp packs" in their range of actives, it stands to reason that the dedicated amp will be even longer lasting. Indeed, I've seen many people online say their 20 plus year old ATC's have not needed to be serviced yet. From what I've read on the matter, these amps are a very simple and well known class AB design, easy to service. Despite being offered on the "pro" section of the site, I'm skeptical that these are meant for anything but the more "hi-fi" pro scene, or perhaps the esoteric type that also decides to run the ATC passives with their dedicated power amp.
They certainly look the part and don't seem terribly expensive compared to other stuff in the audiophile world out there. Around these parts, I think most people would agree that you're better off with a well designed class D amplifier. But if what you want is a really nice chassis, and serviceability options for the next 50 years, this is probably a better bet. You also get something that's hand made in the UK and ATC's 6 year warranty which is a step above most manufactures.
