I own the GIK corner traps and I've got to be honest - IMO they are pretty crappy. They are fairly shoddily constructed, and I've found their performance to be so-so.
In the case of room acoustic treatments, you get what you pay for. I'm not familiar with the RPGs, but the ASC tube traps are the real deal. I believe the cylindrical shape, along with much more dense contents is what contributes to their superior performance.
In the case of room acoustic treatments, you get what you pay for. I'm not familiar with the RPGs, but the ASC tube traps are the real deal. I believe the cylindrical shape, along with much more dense contents is what contributes to their superior performance.