Hi to all, this is a great place to be a part of, have a pair of rs nova 8b speakers in outstanding condition, they're about 40yrs old, I've had them for about 8yrs., I'm maintenance tech and someone left them in a vacant apartment, everything looks great, I cleaned them up and they still sound great, can they be upgraded to enhance the sound even more, once again the quality of the sound is just simply great, just concerned about the age of the components...THANKS TO ALL!!! By the way I have a denon 1912 avr.