My speakers keep muting themselves at random

I contacted Bose @ 8003804831 and they advised me that the computer volume control must be kept at maximum with the minimum being 80% for the speakers to operate properly. If there are any further problems the speakers may need repair. A receipt is required for products under warranty or $75 repair charge for products beyond warranty. I contacted Bose @ 8003804831 and they advised me that the computer volume control must be kept at maximum with the minimum being 80% for the speakers to operate properly. If there are any further problems the speakers may need repair. A receipt is required for products under warranty or $75 repair charge for products beyond warranty.