Ok. Long story short... My current set-up the last 2 and 1/2 years is 2, 12" Atlas's in a sealed box. I'm not sure the specs for the box but they were set exactly like chad told made by someone on sound domain who was a good box builder =). Anyways ; I wanted to get 2 Assassin 12's because Chad told me they could be drop-in replacements. My girlfriend thought as a christmas present she should get me the Arsenals' instead because they cost more and would be better. I didn't find this out till they were shipped to my house. My current amp is Alpine 605m. It does 600RMS at 2 ohms, and 400RMS at 4... It is not stable at 1 (unfortunately =(..) My atlas's were hooked up at 2 ohm's receiving 300rms each. However; the Arsenals' as you know are DVC's and i can only wire them at 1 ohm or 4. I will upgrade my system; but i cannot until next summer. Do you think the Arsenal's will sound good in the same box only getting 200 RMS each? I know it's highly under-powering them but I've heard it doesn't take much to get them moving. I have 4guage wire running through my car so when i upgrade my amp/box it won't take much - but funds are short right now.... So basically i was wondering what are my options until i can by a better amp/box. If i should even put the Arsenal's in my car or just wait until i can upgrade. Thanks for the help.