I am considering switching out a couple of my amps for Class D amps. I have the jx360/4 running my cabins and the e4300 running the tower- both are Class A/B and the e4300 is OLD. The amp for the sub is class D, but old as well. I have a Group 29 battery for the stereo and all other electronics but still think it dies a little quickly on the beach - maybe 2-3 hours of only running towers. I am considering upgrading those two amps to Class D amps, something along the lines of the Kicker IX500.4 for the towers and not sure on the cabins yet. Even with the increase in watts, I assume the Class D amps are much more efficient. Could anyone tell me if I could expect to get a noticeable gain in how long I can play the stereo from the A/B to D switch? My gut tells me no given I'm not pulling tons of wattage, but this isn't my specialty. Thanks!