mostly they are not if it has a dedicated line in you should be fine,, to me the 80 boxes were built very tough now a days most newer stuff dont even compare,, even the cheaper 80 boxes are stil better than anything except the higher end like the altec lancing ipod mp3 player which cost some money then you have your jvc kaboom and lasonic i931 which also plays ipods ,,, but the older boxes really makes heads turn it really brings back those teen memories... so you cant go wrong and the good part is that most of the guys here might have had that perticular box and can give you a better insight on what to expect ,, look at all the post you can ask all the questions you have,, that way you will know for sure how it fairs out,, i have only had the chance to listen to the telefunken version of that box it sounds real good , if you are taken it to the pool or beach i belive you will love the sound , when i saw it the first time to me i would never think it would sound that good when i cranked it up wow...
