Ok.. For the last few weeks, I've had a Gallien-Krueger 115SBX-II sitting in my room as I wasn't able to find the 1001rb-II available in stock anywhere at the time. Anywhoo... This morning I'm delighted to see a nice parcel awaiting opening by me. Finally they sent the head and I imediately rig it up with my cab. First half an hour or so - Total Awesomeness After that - NO SOUND The power protect LED appears when I play any note and it cuts out the sound instantly at almost any volume. Only at very low volumes can you get sound without the LED coming on and without it muting but even when it does, it appears that the woofer isn't making any sound whatsoever, only the horn. I've tried everything from phoning the place I got it from etc but they can't do anything atm because its the weekend. Although they said they would replace the head piece, I have no way of telling if the problem could be because of the cabinet. One thing I will mention is, my brother did put the volume very high shortly after I left the room to get some food, and started playing it. I rushed back and the woofer was moving like crazy and it kind of worried me. I'm worried that he might have damaged the speaker by doing so because he went from low volume to high volume so suddenely. Does anyone have any suggestions as what might the problem be, or if I am right? Thanks.