I ordered a Reference Series Subwoofer to replace my Synergy Series that blew a voice coil. I’m really surprised that a Sub not quite 3 years old did this. I did have it at a high volume, my Klipsch KG4’S handled the power effortlessly, however , the KSW 12 didn’t survive. I replaced my original KSW12 ( purchased in April 2000 ) in March of 2016 with another KSW12 from Amazon!! I noticed the back was set up differently with a different LFE input and the entire rear panel was different than my original one. The amp went out in my original KSW12 and now a voice coil in the next one that isn’t quite 3 years old. I got a really good price on the Reference Series Klipsch R120SW ( Brand New ) I’m hoping this one will hold up better at high volumes and give an overall better listening experience!!