The 4070 was from around 1990 give or take, it's not what I'd call vintage, nor is it a quality receiver in the likes of true vintage Marantz or Sansui, in fact, it was Kenwoods's entry level 40 watt receiver. Some of the Kenwood gear made for the Japanese market is pretty cool though. I have an integrated amp from around the same era, it's a smaller than normal size physically and has a 1/4" input on the front for microphone or other fun stuff with a level control to blend it into whatever you are listening to, so it could be used for karaoke. My daughter is currently using it to plug in an electric drum. I've had it for about 20 years, it's still doing it's thing and I hang on to it just for the feature on the front.