I got this a few months ago and just now had the time to install it. I am using it to power two RSD12D subs. They are each getting 450RMS. Well it worked fine the first time I turned it on, for about ten minutes. I went and turned the truck on and got nothing. The fuses on the amp blow as soon as the remote kicks the amp on. I took the amp out and hooked up an identical xtr900 to the exact same power, speaker, and RCA connections. No problem. Works fine. So what happened to the other amp? I know it is probably an internal problem but what can I do to diagnose it aside from sending it out? Thanks.