I've been waiting for Mackie tech support to get back to me on the DL's input voltage limits. Two phone calls and a week later with what appears to be Loud's (not Mackie anymore) only person manning the tech line (Rebecca), I got my answer. We can't tell you anything (or won't) other than what's in the manual. She claims to have checked (which took the time) with the product manager (or she's making it up as she goes along). I should check with them down the road since it is a new product and they may provide additional information. I explained to her that I've had mine since Sept. of last year and the 1 year Warranty will soon come to an end. The other paths (e-mail and tech requests are still broken for over a week by now). Does that mean will be hearing from India or Mexico soon? Nottooloud walked into the only scenario that Mackie can offer at this time called replacement. I guess that they are hoping their dealers will handle most tech issues. Sounds awful familiar were did I run across this before? Aha the Computer industry.