I have a 500/1.... amazing amazing amp. I love this thing. I don't know anything about Planet Audio so i have no idea if it is 800 max or RMS. I do know the 500/1 is 500 RMS though. U also gotta look at how many ohm it is rated at. the 500/1 is anywhere from 2-4 ohm, the planet audio might be only @ 2 ohm and may be less if wired at 4 ohm. the JL is also very power effeciant.
Loud music is good... Loud music that is clear is better
2002 GMC Jimmy
hu - pioneer primer DEH-P630
Sub amp-JLaudio 500/1
Speaker Amp-Pioneer GM-X564
subs-pioneer Primer TS-W1241DVC
pioneer primer TS-C504 component speakers