I have been doing SPL and SQ car audio for a while now! This amp is rated 5k at 1 ohm but it does much more than that! Why do people want to run amps into the ground by running these power amps at 0.5 ohms!?!?!? It amazes me. This is a stong azz amp, 1 ohms should be enough. 0.5 ohms is for a 1k, 2k or a 3k amp, not for a 5k amp. I wish I need this boy! Bump for you!!!