So I was doing a little test around with my SRX 818 sub today with a pair of PRX712 for a little BBQ Im providing for tomorrow. Previous gigs I was running into a Driverack with a pair of SRX715s with good results. It appeared as though the 80hz,100hz.120hz presets on the sub do not affect the signal output of the mixer. So I am just looking for confirmation these have no hi pass filter on the output? I have not gotten into the software where Im hoping this can be adjusted. For tomorrow I guess I will just plan on patching thru my driverack. I think I will want a 40hz low end cut on the subs anyhow for safety.