Hi all, long time lurker first time poster. I have a Ampeg Portaflex PF500 head conundrum I am hoping for insight on. I have been running a PF500 head either into a PF115HE 450W cab or into a SVT-410HLF. I have two PF500 heads, one screwed to the fliptop of the PF115HE, and the other was...