On my last gig my Ashown C110 1 x 10 made a horrendous loud droning noise when switched on. After some fidding about switching it off and on, playing around with speaker leads etc the noise disappeared but the amp is now a fraction of its previous volume. It was only the second time I'd used it with my new 4 x 8" extension cab. I'm going to need to put this in for repair but would be interested in talkbasser's views on what the problem might be and whether the extension cab could had caused it. Sorry if this seems technically illiterate - the truth is I am.