The 240.4 is a really good 4 channel amp. Are you just going to run the 2 el 1204's off of it? If so the best way to run the it would by bridging ch1&2 to 1 sub and ch3&4 to the other sub. set your Hz level to 45 for each channel and your gain to 3/4.The best way to get your subs the most power would by getting a new amp. Most dont run 4 channel amps for subs. a 2 channel would be the best bet. Use the 4 channel for speakers. at a 4ohm load its a 30x4. thats enough power for speakers. If you were to run a 2 channel amp to the 2 amps then you can wire the amp to hit a 2ohm load. less ohm resistance means more power.Anyways for now bridge your 4 channels into 2. that will hit 120 watts going to each sub. there ya go.