I got burned by NAD decades ago and forever prevented me from buying another. Granted they were new to the market back then.
I bought their first (I believe) high current amplifier, known for its ability to create enough current to almost power a welder (Stereo Review Magazine) into 2 ohms (or 4)... 60 AMP peak current
All was great until one of the 2 channels stopped working after just a year or two, bought a trouble free Onkyo amp instead.
Going back in time and reading this review, I wish I kept it.
www.hifi-classic.net