It should be okay. As long as you have a good electrical system (1/0 wire, big 3 in 1/0, a second battery would be good) and impedance rise during use is normal bringing actual impedance up around 2 or 3, everything should be fine.
I have not run my zx2500.1 below 2 ohm yet, but I plan to run it at 1.4 soon.