I have owned a pair of Klipsch RF15 for about 15 years now. I am satisfied with the sound, but I saw a pair of RF63 for sale in the neighbourhood, and I wonder, are RF63 a better loudspeaker than the RF15. I use different amps, an EL84se, an DIY Hypex class D, NAD 216, which amp depend on the mood I am in? But I liked the sound of my EL84SE, triode wired and about 1,5 watts!
Just looking at random pictures of them, they appear to be of the same series and have the same tweeter horn, only they also have the extra woofer.
It would be interesting to find out what they do with it, but in any case it may offer different room interaction.
It would be interesting to find out what they do with it, but in any case it may offer different room interaction.