Manufacturers with great customer service

T+A hands down, with IAG (Quad UK) a close second.

T+A is remarkably responsive and accommodating, willing to ship replacement parts directly to customers, along with (generally unnecessary) instructions for installing them.

I interacted with Quad numerous times in the 2000s, when I was involved with restoring a # of vintage Quad valve offerings -- tuners, preamps, amps, even ESLs -- to factory spec.  Very friendly, helpful people.

Wireworld Cables, Veritas cables, Oephi Speakers, Lyngdorf Electronics, Stack  Audio, Moonriver Audio. All the companies responded to my emails quickly and never appeared to be bothered with what I'm sure they thought were some stupid questions.

During my search for speakers I was very impressed by how accessible and responsive some of the founders themselves were. Greg Roberts from Volti, Jeff Joseph from Joseph Audio, John DeVore, and Eelco Grimm from Grimm Audio all personally responded to questions I had about their products, which I thought was really cool.

I ultimately ended up buying a pair of ATC speakers, and they have been very responsive as well. I also received very helpful feedback from Audio Note UK on a few queries I had.

I had bad experiences with Bryston, which was surprising, given their reputation is the opposite.

  I had bought a ‘factory refurbished’ optical reader.  It ripped 2 CDs, taking about an hour each, then died.  Bryston had me pay for the shipping.  When it came back it was worse.  They again asked for me to pay shipping charges.  I complained, they were inflexible, I sent it hoping that given their overall reputation that this would be an outlier, and it came back completely dead.  They obviously don’t test their ‘restoration’ work.  I used it as a doorstop for a while.

  I also owned the BDP-3 for a year but found it a terrible component because of the software (mis)management system.  However their CS did try to help, it was just that the component (which actually sounded excellent) was flawed in conception.

  I love Bryston DAC3 and have had no issues with it, and also owned a second hand power amp that worked great until it was stolen.  However I never need to ask for CS on either of those components.

  Second worse CS I ever had was Rega.  I had bought an external speed stabilizer for a P-5 turntable.  It died after about 5 months.  The dealer sent it back over the pond for repairs.  Months and multiple inquiries went by.  Finally after 7 months Rega said it was out of warranty and they couldn’t do anything.  
 

  On the excellent CS side I had wonderful experiences with Cary Audio and Prima Luna

bryston