60Hz hum
Usually this would be ground loop hum, which can happen any time there's more than one path to ground. So check to make sure everything is plugged into the same outlet. But it sounds like you do have everything in one. If nothing is connected to the integrated, just the speakers, and you still get hum, then its the integrated. But its low enough you lived with it for years already. So what's a few more...? |
@ simon45 Look at the plug on the end of the power cord of the NAD C315BEE. I believe it is a 2 wire 2 blade plug. Correct? No equipment ground pin. The unit has double insulated AC mains power wiring. Class II wiring. https://www.crutchfield.com/S-OVXHs39hsLQ/p_745C315BEE/NAD-C-315BEE.html#&gid=1&pid=2 Just a guess the hum you are hearing is not a 60Hz hum. It is not a ground loop hum. Does the hum sound like this? https://www.youtube.com/watch?v=pf-vULfjYK8 Jim |
@jea48 Oh man... When googling it, I came across the PS Audio website and the 120Hz test there is much higher pitched... Mine sounded more like the 60Hz... https://www.psaudio.com/ps_how/how-to-find-and-fix-hum/ But now your youtube link sounds like the hum I am getting and similar to the 60Hz of the PS Audio link... So yes, based on your link, my hum sounds like that. And yes, the NAD has a 2 blade plug. I don’t know what all this means but... thanks to you, I was most probably wrong with the correct hum in the first place. Are the troubleshooting the same for 120Hz? Thank you Monsieur! |
Not what I wanted to hear at all... But yes, browsing further online seem to point to bad capacitors, a known fact with NAD apparently... I've read 250$ for repairs!!! I won't spent 250$ on a 8 years old amp that I paid 400$ back then... What happened to the good ol'days when stuff lasted 30 years?!? I would ditch the bastard in a heartbeat If could afford something new but alas... I am dirt poor! Humming galore, here I come! Thanks to all for the help! |
