I've got my 2011 running through a set of Kef Eggs. i'm very happy on the whole, but whenever i make a change to the function (ie changing input source, changing analogue or digi input, changing SB rear setting, or just muting) i get a hell of a thump through the sub. For info, the amp is set to 80Hz crossover, The sub itself has input level set to about half. Connected via a 3m ixos sub cable. The sub sits about a meter away from the amp. is this normal operation? has anyone else experienced it? is my unit faulty? is my sub faulty? thanks in advance. Mods - couldn't decide whether to put this with amps or speakers, if it's in the wrong place please move it.