I own the Polk Audio LSi9's and use them with a JW modded Museatex DAC and transport, with decent amplification they can do things that many other speakers in their price point simply cannot. They do tend to shock people when you listen to them. From what I understand Polk Audio tried really hard to bring back an "Audiophile" speaker trying to appeal to a forgotten market when they shifted more downmarket.
The reason their such a secret imho has more to do with distribution networks and not really quality of speaker. Most of the dealers that carry these speakers focus on price rather then quality and usually don't have the quality electronics to really show people what their capable of. I have heard from a person in the industry that remarked the LSi15's embarrassed a number of higher end offerings from B&W, Krell and Thiel 3yrs ago at CES. During that demo I think the LSi's were using all Ayre electronics. Again not the kind of electronic's you'd find at most dealers showrooms who carry Polk Audio.
The reason their such a secret imho has more to do with distribution networks and not really quality of speaker. Most of the dealers that carry these speakers focus on price rather then quality and usually don't have the quality electronics to really show people what their capable of. I have heard from a person in the industry that remarked the LSi15's embarrassed a number of higher end offerings from B&W, Krell and Thiel 3yrs ago at CES. During that demo I think the LSi's were using all Ayre electronics. Again not the kind of electronic's you'd find at most dealers showrooms who carry Polk Audio.