I can find a pair of used klipschorns for $5k. Now, I am not a horn cognoscenti but am wondering how they would sound compared to the volti rival?
I can only speak for half of the equation: The Klipschorns. The Volti Rivals l have no experience with.
The Klipschorns are one of my all time favorite listening experiences. I don't have any negative comments about them. The reasons I've never owned a pair are simple, but compelling. I could never come up with the $10,000 to $15,000 to buy a new pair. Even if I robbed a bank, I still don't have the room to place them in. The Khorns care about placement and it would be a shame to put them in a place where they couldn't sing.
In 2017, for the money, you can achieve the same level of performance, or close enough to it, with a wide array of modern choices that don't dominate a room with sheer size. If room size isn't an issue and you are a fan of legacy gear, the Khorns are a wonderful speaker. Klipsch makes several other legacy speakers that look an awful lot like the Volti Rivals. Those may be excellent as well, I just don't have any in person listening experience with them.
May I ask, are you seriously considering a purchase of one of these two? I would like to know why you would choose a legacy design over some of the newer design choices? I am not dead set on any design or manufacturer. I'm just interested in why people make some of the choices they do. Its one of the most interesting parts of the audio hobby: understanding what other folks do.