Manufacturers with great customer service

PS Audio, Hegel and Audio Research are the first three that come to mind for great service with PSA going above and beyond.

I had gotten a Marantz sr5101 from accessoriesr4less that went south. Under warranty I sent it to United Radio https://share.google/6R2FwrgxlrBXRAsk0. During shipping it was thrown across the universe, somehow. They sent me a sr5105. Can’t ask for a better come up. 

Mcintosh  service ctr all over America and been around along time and hope a long time in future. Bryston as well. Enjoy the music.

Others have mentioned coffee related items, and I will too.  About three years ago my home electrical system experienced  a severe episode of repetitive brownouts.  (The audio system wasn't affected, as it was off at the time and, in any case, is also connected to an AudioQuest power conditioner.) But my several-year-old  +/- $500. Baratza Vario coffee grinder was plugged into an outlet in the kitchen and took a hit. 

The morning after the brownouts I tried to grind my daily brew, but the grinder wasn't cooperating- the preset grind time functions wouldn't work, and to grind the beans I had to use the manual grind setting with my wrist watch serving as a timer.

I contacted Baratza and explained the problem.  The tech at Baratza surmised that the brownout had compromised a  capacitor on the power board deep in the innards of the machine.  He provided detailed instructions on how to access the power board and asked me photograph that component and send the pic to him.  The pic did reveal a small burned area on a capacitor.

A couple of days days later I got an email informing me that Baratza would send a new power board and instructions on installation.  The part arrived a few days later, and the machine has been performing flawlessly ever since. The cost?  Zip, zero, nada; no even for postage.  And all this in support of a customer with a machine that was many years out of warranty.

You just can't beat that level of customer support.  Baratza is owned by Breville Group Limited, an Australian company, and can count me as a customer for life.

I haven't rad through the responses but Atma-sphere definitely needs to be recognized for its customer service. I've been with them 25 years without a break and it has never wavered.