i had something like that happen to me once, i was cleaning my stuff like i always do and i guess i put the volume on max on my old reciever when i still had my old JBL's and i turned the radio on a while later and at first it takes the reciever a sec to do its thing and i was walking away and it came on WHOALY s*** scared me half to death it was soo loud. i ran back over and turned it down. it didnt damage anything but... was an experience.