Firstly I have to thank Tyrone, our Sharp projector area sales manager for this one. This tip is for anyone who is using an Arcam DV79 or DV29 and also for users of the Denon DVD-2910 and DVD-3910 who are using a projector or other high quality display device. I'm sure it is applicable to users of other HDMI/DVI equipment. Anyway, if you go into the 'Engineers Menu' on the Arcam player by pressing '4792' whilst in the setup menu there is an option named 'RGB Limit'. This is normally set to 'On' which is believe stops the player producing 'below black' levels and 'above white' levels. This is designed for lower quality display devices such as budget plasmas. Turning this feature off will enable the player to produce another 16 levels of black acoridng to Tyrone. This results in hugely increased definition and contrast once you have recalibrated your dispay device. I'm not entirely sure of the technical details of this feature, perhaps John Dawson might kindly be able to expand upon this subject in order to clarify it for myself and anyone else reading this. To do this on the Denon players ther is a function in the setup menu called 'DVI Black Levels' I think. If you set this to 'Enhance' this serves the same function as the above Arcam feature. Anyway, to summarise, after having applied this change and recalibrated the projector I can honestly say it was like changing the projector to a model costing twice as much. It looked like I had gained another 1000 points on the projector's contrast ratio.