Really enjoying my latest find: the Infinity Reference Standard Five (RS 5). I believe they are from 1982 and include an early version of the Emit tweeter and the Polydome midrange. The 6" woofers have been re-foamed and re-coned by a previous owner. While they are not the original cones, they sound fantastic. Compared to my KEF 103.2, they excel in the high notes. The bass is nice and tight, not boomy; and the mid-range is quite pronounced, While these are from the heyday of Infinity, I couldn't find very much info about them except for the Infinity Classic site, which has some limited information. It doesn't help that Infinity re-used their model names. I think they had several "RS5" speakers in the 80s and 90s. So if anyone has some details on these speakers, let me know.