at 1.7 per amp, it shouldn't be a problem.
I had 2 zx2500's on my 9510F for a show back in february. One per coil, 2 ohms a piece.
Took it for a burp no problem, but definitely didn't like it on music. //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif I had it tapping on the backplate playing some gucci mane.