I've often read that these are very similar speakers, and of the course the companies are closely related. The speakers appear nearly identical, and looking at the spec list of each, the differences are small: the RBH has a slightly larger cabinet, is 2db more sensitive, and extends to 55 rather than 60 kilohertz, and has a slightly lower crossover freq. One big difference: the RBH weighs nearly double.
Here's the part I'm really wondering about: both have "aluminized" 5.25" woofers and 1" fabric (or silk depending on the site) liquid cooled dome tweeters. I understand the RBH has a very highly regarded ScanSpeak tweeter. There's no way the EMP uses the exact same drivers (is there??), but how similar and how effective are the alternatives used? Do these speakers really sound that close, considering their family relationship?
Sorry if this has been covered thoroughly already. I did some searching and couldn't come up with a direct answer in previous EMP and RBH threads...in fact I made myself more confused.