never heard them but there is a guy on caraudio.com that is running 2 of the RL-p 15's with a profile 1400 watt amp i think and hes hitting 151.xx....so thats pretty d*mn good. ive heard they are comparible to the x.x.x and the brahma just dont get quite as loud. but still not far away either. all of the reviews are good, the custom service is supposed to be top notch. ive spoke w/ mike before he seems like a cool guy.