I don't know. I had one of the early dual recs back in the day. It sounded great. I now own a new multi watt triple rec. It sounds great, with more bells and whistles. I don't remember my old head that much more magical. Plugging in to my new head playing the old material, it brings back memories of the old head. I guess I'm going to take some flame for this, but personally the progression of the product line has been a plus. I welcome dissenting opinions.