I am going on various sites that I visit to see if anyone out there can give me any info on these speakers - RTR Model C Series IV. I just picked up a pair at the local thrift store and they appear to be in great shape and sound fantastic. All I have been able to find out so far is that the company RTR was a small company which produced some pretty good speakers back in the 80's and apparently were bought up by BIC at some point. Given their possible age does anyone have any tips on how to maintain them or possible clean them up? Any info provided would be greatly appreciated!!
