I've scoured the Google-lands for quite some time but cannot seem to determine an efficiency rating for the Trace Elliot 1153 1x15. I'm trying to determine if two 1153s would be more efficient than my existing Aggie DB410. I know that it won't be prettier but I'm trying to see if I can get my rig to have a better polar response, equal or greater loudness, and be able to break down to a 1x15 rig when necessary (the head in question is an Orange AD200). It's either that or waiting and saving for fearful dually build, barefaced super 15 or similar. Thoughts?