When wearing my audiophile hat, I'm not very keen on the matching transformers used in typical 70V systems. These are not premium transformers and they limit the sound quality. But, one must focus on the ultimate goal of the system -- providing a pleasant dining experience. In my opinion, there is very little benefit in attempting to deliver audiophile quality to a restaurant dining room. Regardless of the 8-Ohm or 70V mindset, using ceiling mount speakers (of any quality) is not the way to deliver audiophile sound. The overall goal is to deliver competent audio quality from a system that is utterly reliable. And, inexperienced staff should be able to operate the system.

If there will be live entertainment, system design is a bit more complicated because the the system may need to interact with the musician's equipment and speaker placement will be more critical.