No, I can not say definitively. The twice is a guesstimate. But it is based on full antenna range testing (ala Lee Demary). Unfortunately, it was not the same place. But if anything, it was a conservative test as the place that I tested the MPX (Lumberton, MS) has a crown in the runway. In other words, when I get to the far point in the test (never really have found the limit of the MPX system as there is a farmer's fence that limits how far I can go), I can no longer see the aircraft by direct line of sight (I am shooting the signal through the runway, so to speak). With the Futaba 9Z, it was direct line of sight. Both tests were with the plane up on a non-metallic table. Range was roughly double for the MPX and, as stated before, I never really found the limit. Ask Eddie how much range he could get on his Profi 4000!