I'd first call Energy and get a price. I recently went through something like this with a JBL sub in a restaurant. Not only was the unit no longer made, but the dead amplifier chip was no longer made and to repair the unit meant to install a used amp that the JBL repair guy had from an abandoned unit. My choice was to keep the box and maybe use it at another restaurant with a new amp, not JBL. There was no way I would charge for a repair on this as I couldn't stand behind it.
Maybe the Energy guys will be able to give you the scoop on this, and knowing the price will help you decide which way to go.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw