fortunately i have a mini-van, but I'm only using the very back cargo area. and i agree completely about the enclosure, i know that makes all the difference. and even though i am after sound quality, I'm torn between these two because of the tremendous sound pressure they put out as well. i do like to feel my quality sound! i know that they're both good brands, and i can't go wrong with either one. that's why I'm so unsure about which one to go with. i have to say that i like the way the soundqubed looks, they have that thing that made me excited back in the 80's, ya know? that was primarily what made the decision back then. now that I'm old(er), i do research and try to get the best value for the money, i.e. quality, reliability, etc... so you'll probably tell me to go with the soundqubed because that seems to be the one that i like, but the sundown amp is a monster, and it looks better on the inside. so does it put out the quality of the soundqubed? they're both class d but we all know that different manufacturers produce different sounds. like jl audio, i love their subs, but the amps sound like shit in my opinion. so yeah, there goes the indecision part of my dilemma. thanks for the response though, and sorry if i talk your ear off!