The problem that we had with the 4 bay is that it's "field of view" is not large enough for a suburban area say 45-60 miles away from the towers. Where we are located the majority of the stations are right next to each other but there are 2 that are slightly south. We can't receive good signal on all of them and when you split the difference the signal is not good enough on any of them. So we switched to the 8 bay. Problem solved. We use it alot in the 60-70 mile range, and always in the attic.