This question sir is impossible to know unless you have both subs, running on the same amp, in the same enclosure, in the same vehicle, with a termlab. Other than that there is NO way to answer that question. We can have our opinions, but that is the only sure way to tell. I am pretty sure both can giggle with 2400 watts rms though. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifI was debating on the thing don't know if to go with 15 lvl5. I hear good things about both but which one will get louder on 2400 rms?