There is one sound board connected to the cabinet, which is connected to two small sound amplifiers, a high and a low, both with independent knobs to adjust. If the upper and middle speakers are not working you can test the board itself by plugging the board into a reciever and some speakers to see if things work (that is how I record from my machine). If that does not work then their could be ea problem with the amplifier, board, chipset, etc. I can take pics inside the machine if you need it... |