Yes the FX3000 is double 1500's but not the ZX series 3000 watt. The FX is Kinda like their entry line up.
did your class AB got abnormally hot.. I've noticed that I am so used to class D now with how high the efficiency is that I think all class AB seem hot with their lower efficiency (65%/75%).... back to the the ZX line up! Lol... that's what I'm anticipating. They have a 360.4 (150×4 @4ohms stereo and 200×4 @2 ohms stereo) coming my way! The 3kw looks fairly decent.. Not like its going to do OVER rated but will produce a clean 3kw. I got ZX3000 board shot some where..
Looks similar to a Korean board layout...