First, I don’t think we’ve yet defined high-end. It isn’t just how expensive it is. There is of course “mass market”, and "limited distribution product", and "product from small manufacturers". I don’t think there are black and white definitions of what constitutes any of the above, a lot of grey area here.
In 31 years in this industry I’ve never seen any serious data or studies showing stats on reliability.
Just some of the equipment I’ve owned or used extensively without problems:
Muse, Musical Fidelity, AVA, Sonic Frontiers, Primaluna, Audio Research, Rega, Crown (Macro Ref), Korato, Halo, Denon, Marantz, PS Audio, B&K, Threshold, Luxman, Rotel, and assorted modified gear.
Others have mentioned NAD, so I’ll mention that one of the biggest problems I’ve had was with a NAD piece. Took six months to get it fixed.
I know for a fact that our speakers are extremely reliable. For example, I cannot remember the last time someone fried one of our tweeters. Warranty claims are extremely rare. Even beyond warranty inquires for repair are a very small number. Interestingly, a few customers have had multiple driver failures. One recording studio managed to destroy two Sapphire XL woofers in less than 6 months. I was later told by someone who had spent a lot of time in that studio that they were being pushed to insane levels for 12 hours + /day. They preferred them to their $60,000 custom built-in system and cranked the crap out of them all day long.
In the end, it’s pretty hard to make any definite statements about brand reliability. As others have said, it is best to do as much research as possible before purchase, from as many sources as possible.
Now computers, don't get me going
