In line to get a GK Neo 410 or 212 and i'll be using it with an Ashdown ABM 500 (non bi-ampable) but am just wondering if the tweeter is able to be switched off completely on the cab? I'll be using the "full range" setting but it looks like the tweeter control can only be reduced to -2dB. Can it be turned off completely? Tend to use some dirt on my amp which sounds too harsh with tweeters. Also, this may sound like a silly question but what's the difference between "Normal" and "High range" on the tweeter control? Is normal no tweeter or normal level of tweeter?