Neither. If you want a budget Polk sub look for the psw505. The rest of the psw line are pretty much junk. The dsw subs are okay performers, but are overpriced for what you get. If your willing to spend what the dsw550 costs, you would be better off with something from svs or HSU.
I don't need snobs to tell me how to think, thank you!
Sorry but PSW505 is total junk.It produces 60Hz hum which can be heard when no signal on input is present. Its bass is slow and muddy.
I purchased this couple days ago and this was one big mistake I do not wish to make again.
Aparently the 700 five star reviews for this sub posted on one of many on line merchant websites only proves that for many folks, the 505 is first sub therefore they have no idea how decent sub should perform.
Highly not recommended.