CB radio PA speaker

Question

I recently swapped out my crappy Cobra 19 Ultra III for a nice Cobra 29
LTD NW CLASSIC. everything seems to work fine so far but the PA
speaker. On my old radio
the speaker was quite loud. this one is so super quiet. The radio is
used but was said to be tested. when i receive a signal on the radio
through the PA it sounds a little louder but not much... Any fix on
this one guys!?!?!