yes they are very efficient 90% and tiny footprint, only thing is that i noticed with them is they dont put out the power i thought they would. i had 2 of them. my crossfire vr401 killed it.if you can locate a used Memphis 500d it will give you the power you need in an efficent compact package...It seems like I've seen one on the for sale catagory over the past few days....in that price range