Ive owned one for over a year. i use it with an older atlantic technology 225 watt 12" & an older atlantic technology 125 watt 10" in a stacked configuration & its pretty darn good. I get a tighter bass note from the 10" & the 12" atlantic techs & lots of boom out of the starke 15. I make a neighbor that lives nearly a 1/4 mile away mad all the time too, not bad for 900 watts & 37" of cone