Hello guys! Need a few suggestions from you again! And that is: I’m looking for a new sub-power amplifier (my Rodek doesn’t bring it anymore). I wanted to spend up to 650 euros. I’ve already looked at the HiFonics AX 4000D, which was already awesome. What do you think about it? Or would you recommend me another one. Still wanted to say that I need a lot of power but also pay attention to the damping factor and the distortion factor. Thank you already in advance! MfG