There is an annoying whining noise coming from the sub-woofer whenever the unit is switched on. The fan speed increases when audio output from the TV is heard and during lulls in TV conversation the fan can clearly be heard spooling down as the speed decreases. I am on the second sub-woofer unit and Sony have ordered a third one as a replacement. To be honest I am not expecting this one to be much, if any, better than the first 2.

Clearly someone in the Sony organisation has missed the noisy fan issue or decided customers will have to put up with it.

The noise is distracting and totally unacceptable.