when did the heritage series come out my friends cornerhorns are from 1985 he does not think they are the heritage series mine are 1995 models I also dont know if either of ours are maybe just the newer ones anyone know. Also when I was trying to figure out why I couldnt get them to play last night I down loaded the owners manual last night I saw where there was a jumper wire the manual said leave it in place unless your going to biwire.My friend who has had his for 25 years said im nuts he has never heard of a jumper wire and that khorns have been around for 60 years. and not much has changed Anyway whats the deal with the jumper wire thanks again to all