guys, we were at practice tonight and the mic was plugged into the EVP and began to feedback. It wasn't a heavy feed, though it is never good but we got really concerned when a light began to shine inside the wharfdale amp. No explosions or smoke (thankfully) and the amp still works. It even stumped our local electrician who recently got the power back working. The front of the amp has 2 speaker cones. To the left and right are holes where the light shone through. It was a serious light too, like a household bulb!! Been looking on the website for answers but to no avail, so thought i would try the next best place. Anyone have any idea what is going on?