Buy a Behringer iNuke Amp. I got the iNuke 6000DSP for my 2 Epik Empires. Very happy.I have an Epik Sentinel that just started acting up. Sometime I turn it on, and the power light does not come on. If I unplug the power and the audio from the LFE jack for a few minutes, then try again, then it works. After several minutes, the sub stops working again.