I started with Zu Definition 1.5s then upgraded to Def 2s, and now to Def 4s. Zu customer service is unbelievably good - especially if you pick up the phone and call. (Sean personally delivered my Def 4s at 7a one October morning and spent a couple of hours on set-up, including the controls of the inboard plate amplifier.) Anyone at Zu who answers the phone is over-the-top helpful. At the worst, emails sometimes take a few days to be answered. Most importantly, Zu is proactive in making sure that customers are happy; I get emails to check the progress of speaker break-in, etc.
My second positive experience is with Ancient Audio in Krakow, Poland. I bought a CDP and eventually an amplifier after being picked up at the airport and spending an afternoon listening to music in the principle designer's living room. Recently, Jarek has helped me to negotiate purchase of a specific pair of low-current 300b tubes from the Takatsuki distributor in Japan.
My third positive experience is with Sophia Electric in the DC area. My initial pair of Royal Princess 300b were not compatible with my amplifier. Susan and Richard opened their office on Sunday to test the pair of 300b that I had been using successfully to identify a two Royal Princess with the same parameters.
My second positive experience is with Ancient Audio in Krakow, Poland. I bought a CDP and eventually an amplifier after being picked up at the airport and spending an afternoon listening to music in the principle designer's living room. Recently, Jarek has helped me to negotiate purchase of a specific pair of low-current 300b tubes from the Takatsuki distributor in Japan.
My third positive experience is with Sophia Electric in the DC area. My initial pair of Royal Princess 300b were not compatible with my amplifier. Susan and Richard opened their office on Sunday to test the pair of 300b that I had been using successfully to identify a two Royal Princess with the same parameters.