Are these amps 2 or 1 ohm mono stable or would I be pushing it. I believe the 150x puts out 500x1 at 4 ohm bridged. Can I bridge it down further to 2 ohms or am I asking for trouble. Any input is greatly appreciated. I was also considering using the us amps optimizer with these amps. The 100x would power boston pro60 3 ohm speakers in stereo. The 100 would power boston pro6.5 in the rear in either stereo or mono, probably stereo. I was looking at picking up a 8'' sub and running it at 2 ohms off the 150x. Maybe a 8w7(3ohm i think), tc sound, fi, or soundsplinter. Am I asking for trouble? or can these works of art handle these loads all day long? This is all going in a rx7 turbo btw thanks Also would I be better off running the bostonpro6's of a brand new usa-600 or is that overkill? ps I looked in the manuals but they list "NA" under 1 and 2 ohm mono loads