In my last house I used ASC tube traps. When I moved and built my current room I went with Real Traps. Both rooms are located in the basement and are basically the same size.
I was able to try both in my current room and sold the ASC traps. The soundstage was much better with the Real Traps.
I was able to try both in my current room and sold the ASC traps. The soundstage was much better with the Real Traps.