haven't plopped a better low power sub into my wall yet... And I've had some RE SX's in there =-o The strokers are getting old and can't take a beating like they used to...but damit I can't find anything better? lol They are some kickass subs, and I'd buy some new ones if they didn't cost SO much on ebay... ah, and yea... they do have that one big peak in most boxes. I had them in... about 2.5 cubes each tuned to about 42hz and they were loud over a pretty large range, didn't sound terrible.... and was DAM loud. 8 cubes 35hz... sounded pretty sweet, but yea, peaky. 15 cubes 40hz... probably my favorite. It was loud, and still sounded pretty good. (was a half wall - middle port). 25 cubes at who knows what freq.. why did I ever build that box lol. 10 cubes at 62hz, SQ is out the door except for a very, VERY select few songs that sound sweet. WIth the port plug, they tune to about 45 hz... sound's better but no SQ setup... to peaky.