In my opinion (of course right?) an angle behind a two woofer setup makes much of a difference from an SPL standpoint. I know the two oudest SS1-2 cars don;t use angles in their two woofer setup. If it was 3-4 woofers,,,that's a different story.
And yes the actual angle makes a difference and a 45 degree angle isn't it in most cases. At least from when I messed with them. I won;t tell anyone what the best angle is. It goes to the grave with me. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif