Just added a 15 yrs old sub that was on my home theater that I am not using it any more to try out on Cary SLI-80 yesterday. Wow, unbelievable the soundstage opened up a lot more with very big noticeable. But the volume was very low and not happy with it so I took the sub out. Somehow after I connected RCA to sub outputs on SLI-80, the volume was lower right away.
