Originally Posted by The DarkSide
None, I have a personal preference, as I stated.
Why do you have a personal preference for line output when you're not having any problems with using the headphone output?
For local dance events I own a 1,000 watt professional audio system including a 500 watt subwoofer. DJs regularly plug their iPod headphone outputs into the mixer to do their sets and they sound great. I was really surprised the first time we did this. Apparently output impedance isn't critical with modern audio equipment so line output isn't necessary any more.