If you are using your sub, it is taking much of the dynamic load in movie mode making it hard to see if the amp does anything.
But isn't that the point. I have two subs, and if they are offloading that much from power demand from the amp that I don't require the extra wattage, then why the heck would I want to have it? The only reason would be that the if/when the subs do fail and it's considered too costly to fix them, then perhaps having the extra wattage for the LFR's might be advantageous. But what is going to fail in the subs? the amp. So if amps are the likely component to fail, what is to say that the ADA1500 won't fail around the same time as the subs? in which case it would have been a waste of money as now I'd have to repalce both.
