Is there a difference between the new comp and the older ones? I have read about settings but it does'nt appear that mine has as many options. I just have 4 light bars and i assume there are only 5 settings. How are you guys getting the sub level settings?

 

When all else fails finish reading the instructions

 

press and hold the power button. the bars will flash rapidly. adjust to desired level and then shut it off...level is set upon next power up.