Charlotte signals come from 2 locations. WSOC-TV Channel 9 and WCCB-18 are near the University area of Charlotte in Newell. Which is ABC and FOX. The other channels, WBTV-3, WCNC-36, WJZY-46, and WMYT-55 are in Dallas in Gaston County. The Newell signals are closer and easier to receive at your location in Monroe. So you should aim your antenna probably more to the west toward Dallas, but trying to find a sweet spot to receive signals from both locations. And only one amp should be necessary, and probably place it at the antenna in the attic, or right before the signal splits at the junction box. And a dist amp becomes a preamp when used with a remote power supply, rather than plugged in directly to an electrical outlet. The Holland amp from MCM can be used both ways, and they also sell the remote power supply. Same with Motorola, Channel Master, and Viewsonics versions. Or you may want to consider a Winegard 269 which is a preamp only. The amp may help prevent dropouts on CBS Channel 3. The Dallas towers are much taller, so you should still get a good signal, although 36 and 46 are side mounted more in your direction than 3 which is more omnidirectional. And be aware that FOX is moving to 46 in July, which is currently CW. And you may get a secondary ABC signal from one of the WSOC translators, but the main Newell signal on RF34 should be your easiest and strongest.