From what i can tell from schematics, the speakers are wired in parallel so i'm guessing they should be 8 ohms each which makes for a total load impedance of 4 ohms seen by the sound board. Using two 4 ohm speakers would give a two ohm impedance which risks damage to the audio amp IC on the sound board.
Its possible you may have damaged the sound board, I'm not too familiar with the sound board on Sorcerer, if the sound board has any fuses on it check them. That's a worst case scenario though if the amp has blown, but is a relatively easy fix if it has. Could be as simple as a dislodged connector so check for that too!
