I have just bought the Kef KHT 2005.2 speaker system, and am having a few problems. I am using an Yamaha A5 as my amplifier/processor. I have wired it all up correctly and the little eggs sound great, however I don't know whether my expectations are too high but I can barely hear anything from the Subwoofer at all. This is surprising as I have ensured I have done the following.... * Amp set to small speakers and Bass channelled to Sub only. * Connected Subwoofer cable to the left input on the sub. * Have crossover set to max, and the input. * Tried it in different positions with different films. * Tried playing the same loud part with the sub on and then off with no audible difference. The Phase knob doesn't seem to do much, the unit just seems to emit a humming noise which in quite sections you can hear alongside the film. I have tried touching the speaker when working and it is vibrating, but not much. Please can anyone offer any advice, it's driving me up the wall, I'm starting to think the sub doesn't work properly. Many thanks in advance.