Haven't seen any discussion lately about the best way to eliminate the popping or ice pickiness you sometimes get with an amp, more specifically a DRRI. Also seems to be worse with a little delay and compression going. Lots of folks like the Weber Beam Blocker as the best solution, but others swear by the Mitchell Doughnut method, a foam cutout between the grill and speaker, leaving the center open. Still others slap a piece of duct tape over the center cone on the grill. I'd be happy to hear any thoughts on the subject, especially from someone who's heard both.