Actually I was at Reading this past Sunday for the first time and I was hearing 107.5fm and 107.9fm. 107.5fm tends to lose signal at a few areas in Reading, maybe that's why they have 107.9fm simulcasting 107.5fm to make sure they have a solid signal...
jay1986, that is correct.
Positively Different 107.5 Alive.fm (WBYN-FM) was (at the time of your last post) broadcasting on both 107.5fm (WBYN-FM) and 107.9fm (W300BZ), to ensure full coverage of that particular area. That said, 107.5 Alive now broadcast on both 107.5fm and 103.7fm (
W279CB), instead of 107.9fm (W300BZ).
That said,
La Voz de Esperanza 107.9fm (
W300BZ) (which means "The Voice of Hope"), can now be heard on the 107.9fm (W300BZ) frequency, (also referred to as: La Voz de Esperanza WDAC 94.5 HD-3)

.
La Voz de Esperanza's estimated coverage area is from Reading, PA to Lancaster, PA on 107.9fm, broadcasting
Radio Moody, in
español.
Each of these above mentioned stations is
owned locally, by
WDAC Radio Company. All in all,
WDAC has been broadcasting on
WDAC 94.5fm HD-1 The Voice of Christian Radio for around 55 consecutive years now, whereas WBYN-FM has been broadcasting for around 50 years now (though not consecutively).
107.5 Alive (WBYN-FM) was formerly known as "WBYO" and also as "WBYN," (before there was later a "WBYN-AM" station, which is otherwise unrelated nowadays).
As a sidebar, though not FM (or AM) WDAC also carries:
HOPE 94.5 WDAC HD-2 Music for the Heart!, in both HD and
streaming worldwide, which is unique in that it is commercial-free, program-free, and talk-free, which is why business owners and operators are prone to stream it in their workplace.
Hope this helps.