the death row series is pretty much ia's dailly ground pounder sub. the flatline is the sound quality sub, the death penalty subs do good in comp or just daily ground pounding, now the warden while it can be used for daily it really shines in comps, on alot of power. anything under the death row is pretty much you entry level 300w, 600w subs not that they arent any bit as well made as the upper tier subs they were just mainly designed to fill the gap. they smoke rockford and memphis hands down for the money