Ok here goes guys. I have a washburn AB-34 acoustic bass. When I play first i have to pop in the thing that holds the battery and has the eq ad volume on (not sure what it is called). And it works fine thn a couple of minutes later it will cut out and stop working i already tried to change the battery and it still does this. I really need to get this solved as my band is going to be playing some shows coming up where i am going to need to use my acoustic. Any help would be greatly appreciated.