I was reading on Escort's forum and saw that the rep claimed
"The M4 antenna may have a slightly narrower cone than our other antennas but this should not effect it's ability to identify and alert to a radar threat. Actually many find M4 has an excellent ability to detect over the hill signals which is far more critical than detecting off to the sides. Filtering has nothing to do with off-axis detection, the cone of detection is determined by the antenna horn's physical design."
9500ix 1st impressions - Page 3 - Escort Radar Forum
I have seen alot of V1 vs. IX off axis tests, even did one myself. And the V1 always wins hands down. I haven't seen alot of tests between the V1 and IX in over the hill encounters. Anybody know of any tests or videos out there on this?