Hi, At the end of a jam on the weekend, my amp seemed to die. I pushed it a bit, but no more than 30% full volume but the gain & boost was up fully. I have an entry level Ashton BA150: http://www.guitar.com.au/amplifiers/bass/ashton/ba150.htm / http://aycu23.webshots.com/image/40462/2002257704417966278_rs.jpg At the end of the last song, when I played a note the amp started making a knocking sound like a rusty old gatling gun. Tried different leads, other power points, a guitar, etc. So definitely think it's an amp problem. My guitarist said it sounded like the preamp was shot, I wouldn't have a clue ... any ideas?