I have the GK 700rb mark II (which I am quite happy with) and 1 GLX series 4x10 (weighs a ton) and 1 NEO series 4x10 . My question is, the NEO (8 ohms) utilizes the SPEAKON cable, whereas the GLX (8 ohms) series only has a 1/4" cable jack . Is it safe to use both cabinets simultaneously - using 1 SPEAKON cable and 1 1/4" cable at the same time ? I can't afford to burn up this head because of a dumb mistake on my part . Anyone know ? Thanks !