for the majority all the people i know with memphis subs go sealed i mean deepends what your looking for out of your subs i mean if you want to go deep id go with sealed if you want loud ported but i wouldn really know much bout memphis id like to get some but for the moment im sticking to my kickers i got 12's in a ported plexi window box and the pound pretty louder then sealed and like i said about memphis i know lil about so cant help you much on the amp question although 3 12's for one amp is kinda rough id go with two amps to be safe but thats just me

Go ported. Your going to get more deep bass out of the subs that way. Plus, they'll hit lower frequencys in a ported box. In a sealed box your hearing the sound waves coming off the front of the sub. In a ported box your going to be hearing the sound waves coming off the front AND the back of the sub. A ported box acts like a natural crossover. If sound quality is what your aiming for then by all means get a sealed box. But if you want the MOST output from your subs then get a ported box. As far as your amp is concerned. Thats a no go. There is no possible way to wire up those subs to that amp with the voice coil configuation of those subs. And using 2 amps would be a waste of money. The best option for you would be 3 amps ( one for each sub) and a CUSTOM PORTED BOX. Preferably built by a local audio shop or by someone with some box building knowledge. Also, with the 3 amps be sure they have subsonic filters on them. So you won't burn up your subs in that awesome ported box. Please don't waste your time with the amp mentioned in your question. You'll only burn the amp up because as i stated before. There is no possible way to wire those subs up to that amp. I mean, you can but you'll just burn the amp up.