Thanks for the help I apreciate it. I had a feeling my amp was to strong for only 2 of those subs. fowler u are talking bout the US 2000x model that makes it power at 4ohms. Guys one more question what size box should I put each 12d4's in. I will run them in a seal box.

Hello,

I have a US 2000a amp that does 2000rms @2ohm bridged and I was wondering should I run 2 of the rsdc-122 or 3 of the rsdc-124