The death penalty 21 is a strong sub if you can find the 2010-older magnet. The new one has horrible coil rock issues. I had 2 of them in 18s and completely trashed them within a few weeks on burps cuz of the coil wobble(then when that was the only damage incriminator told me I had been bottoming them out, when clearly the pole piece and inside of the coil were all destroyed and scratched to hell).