I just unboxed a new Ampeg BA 108. The sound is distorted through the speaker but sounds fine through the earphones. I have to suspect that the speaker is faulty but it seems most unlikely that a new amp would have a blown speaker. I know absolutely nothing about amps. Any guidance in trouble shooting to find the solution will be appreciated. I received this amp the day before going into the hospital for six weeks or I would simply return it for exchange or refund, As it is I need to be able to make the needed repairs myself. There is no warranty beyond thirty days from receiving. Thanks.