It's designed to "punch through" lower-rated splitters (also transmits at a very high power level), even through the usual 130dB output port isolation of good splitters. Nothing above 1GHz is necessary, although some would point out it can even get through lower-rated ones (YMMV), while some (with good intentions) recommend unnecessary higher-rated splitters. Higher ratings can't hurt, but very rarely has it ever fixed anybody's MoCA problems, or made any significant enhancements/improvements. I'll note that all coax should be RG6, and any RG59 may degrade things, if it's passing/carrying MoCA through it. MoCA is designed to avoid requiring changing your existing coax and splitters (YMMV, if you have old/RG59/poor-quality coax, or poor-quality splitters). The only PITA factor about MoCA is that it requires PoE filters to contain it, and to keep it out of devices that can't handle it (as well as keeping it inside your home). EDIT/ADD: Why doesn't MoCA just "power-through" tuning adapters? Many TAs aren't a true passive (passthrough) device. They have a built-in signal amplifier (mostly to keep the OUT at the same level as the IN), which is only designed to work up to 1GHz. Any amplifier or device with an amp may have issues unless designed specifically for MoCA (YMMV, some amps with a higher rating might work).