For testing we used a Spyder 4 Elite Colorimeter, with all the settings on the BDM4065 reset to default. The SmartImage preset was set to off and sRGB was disabled. Gamma was set to 2.2 and colour temperature to 6500K.
The first part of the test showed 99 per cent sRGB coverage, 71 per cent NTSC and 76 per cent AdobeRGB. Very good results, and surprising, given the effect of washed-out colours when first turning on the display, before calibration.
Brightness levels came to 278cd/m2 at 100 per cent brightness in the OSD, which is generally lower than most displays, given 350 cd/m2 is attainable on some panels.
Display uniformity is also surprisingly good for a display of this size. It deviated between 1.2 and 8.1 per cent.
Gamma results seem off though. At gamma 2.2 the Spyder recorded an actual gamma closer to 2.0 with 2.4 being closest to the 2.2 figure.
With the display calibrated, the Spyder measured a good average Delta E result of 1.29, with a maximum value of 4.67 and minimum of 0.33. Power consumption figures seem high, but this is expected from such a large screen. With the BDM4065 at 100 per cent brightness, it consumes 75.5 watts of power, but with the brightness at a more reasonable 120cd/m2 this drops by a third to 50.9 watts.
Being a 40-inch screen with a large panel to illuminate, it’s going to need a lot of power, but the consumption is still better than Dell’s 32-inch U3214Q, from which I recorded a whole 100 watts at 100 per cent brightness and 55 watts at 120 cd/m2. However, even in standby mode, the BDM4065 consumes 11w of power, possibly the reason for the inclusion of the kill switch on the side.