Funny story. I was doing a gig last night. Right in the middle of a song, my bass cuts out. At first I thought that my instrument cable got pulled out the jack. I exaimined that and found it not to be the case. I looked at my power amp and saw the signal lights were still coming on, so I knew that I didn't blow that. I knew that I couldn't have blown all four speakers in my cabinet right there. I pulled the cord out of the active input of my preamp and put it in the passive - still nothing. I then walked behind my cab and see that the speaker cord is pulled out about a quarter of an inch. I pushed it in and gave myself a little shock. Sound started coming out of my cab again and all was well. Luckily I was D.I.ed to the board, so I continued playing after my stage volume cut out, but I was scared as hell that something went kaput in my rig. I have a Speakon end going to my power amp, but the end going to be cab is 1/4 inch. I might have to invest in some dual Speakon ended cables. All of the vibration on stage actually loosened the cable end out of the cabinet's input jack.