Has anyone here experienced problems with an Ashdown EB15 130watt Combo? Mine is probably a couple of years old, but has started making horribly loud distorted/crackling sounds when played for more than a few minutes at over half volume. Sent it away to be fixed, but it came back exactly the same having relieved me of £80. The repairer is saying they can't find anything wrong with it and it's proving difficult to demonstrate the problem when they're 200 miles away. Any suggestions would be very welcome.