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Comparison Samsung QE-55Q8CAM 55 " vs Samsung QE-55Q7FAM 55 "

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Samsung QE-55Q8CAM 55 "
Samsung QE-55Q7FAM 55 "
Samsung QE-55Q8CAM 55 "Samsung QE-55Q7FAM 55 "
from $1,938.67 up to $3,014.20
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Main
Remote unit One Connect. Audio system 4.2.
Excellent colour gamut. Small input lag. Audio format 4.2. Slim form factor. Remote unit One Connect.
Size55 "55 "
Operating systemSmart TV (proprietary system)Smart TV (proprietary system)
Display
MatrixQLEDQLED
Screen surfaceanti-glareanti-glare
Resolution
3840x2160 px /Ultra HD/
3840x2160 px /Ultra HD/
Dynamic contrast1 000 000:1
Frame rate60 Hz120 Hz
HDR supportHDR10HDR10
Multimedia
Sound power60 W40 W
Number of speakers44
Subwoofer
 /2/
Digital tuner
DVB-T2 (terrestrial)
DVB-C (cable)
DVB-S2 (satellite)
DVB-T2 (terrestrial)
DVB-C (cable)
DVB-S2 (satellite)
Features
Features
Wi-Fi
Miracast
Bluetooth
voice control
Wi-Fi
Miracast
Bluetooth
voice control /with One Remote/
Connectors
HDMI44
Additional inputs
USB
LAN
COM port (RS-232)
RS-232
USB
LAN
COM port (RS-232)
RS-232
Outputs
optical
optical
External connectivity unitOne ConnectOne Connect
General
Wall mountVESA 400x400 mmVESA 400x400 mm
Power consumption195 W140 W
Dimensions (WxHxD)
1225x790x301 mm /with stand/
1225x788x304 mm /with stand/
Dimensions without stand (WxHxD)1225x706x91 mm1225x704x45 mm
Weight
23.2 kg /with stand/
21.2 kg
Color
Added to E-Catalogapril 2017march 2017

Dynamic contrast

The level of dynamic contrast provided by the TV screen.

Contrast in a general sense is the ratio in brightness between the brightest whites and the darkest blacks that the screen can produce. Other things being equal, the higher the screen contrast, the better the quality of colour reproduction and detail, the lower the likelihood that it will be impossible to see details in too bright or too dark areas of the image. Formally, the main characteristic of screens is static contrast (see above), but even in advanced matrices it is relatively low. Therefore, manufacturers went to the trick, introducing such a characteristic as "dynamic contrast".

Dynamic contrast ratio is the difference between the brightest whites at the highest screen brightness settings and the darkest blacks at the lowest. These contrast ratios can be quite impressive—much higher than static—however, it is impossible to achieve such values within a single frame, and dynamic contrast ratio is stated more for promotional purposes than for describing the actual specifications of the screen. However, it cannot be said that this indicator is completely unrelated to reality. The fact is that many TVs use automatic brightness control, which changes the settings depending on the characteristics of the image. This control is based on the fact that when displaying bright scenes, there is no need to provide a deep black level, and in dark scenes, high brightness of light areas is not needed — th...ese are the features of the human eye. This means that in bright scenes you can increase the overall brightness, and in dark scenes you can reduce it; the maximum brightness difference achievable in this mode of operation is precisely described by dynamic contrast.

Frame rate

The highest frame rate supported by the TV.

Note that in this case we are talking specifically about the screen’s own frame rate, without additional image processing (see “Index of dynamic scenes”). This frequency must be no lower than the frame rate in the video being played - otherwise there may be jerks, interference and other unpleasant phenomena that degrade the quality of the picture. In addition, the higher the frame rate, the smoother and smoother the movement in the frame will look, and the better the detail of moving objects will be. However, it is worth noting here that playback speed is often limited by the properties of the content, and not by the characteristics of the screen. For example, films are often recorded at a frequency of only 30 fps, or even 24 - 25 fps, while most modern TVs support frequencies of 50 or 60 Hz. This is enough even for viewing high-quality content in HD resolutions (speeds above 60 fps in such video are extremely rare), but there are also “faster” screens on the market: 100 Hz, 120 Hz and 144 Hz. Such speeds, as a rule, indicate a fairly high class of the screen; they also often imply the use of various technologies designed to improve the quality of dynamic scenes.

Sound power

The nominal power of the sound produced by the TV's sound system.

The larger the screen and the greater the estimated distance to the viewer, the more powerful the sound system must be in order to be heard normally. Manufacturers take this moment into account, moreover, most often they also provide a solid volume margin. So if a TV is bought for home viewing in a quiet, calm environment, you can not pay much attention to the sound power: it is guaranteed to be enough for such a usage. It makes sense to specifically look for models with high-power speakers for a noisy environment — for example, a cafe or other public space. Detailed recommendations on this matter can be found in special sources, but here we note that even in such cases, connecting external speakers can be a good alternative.

Power consumption

The electrical power normally consumed by the TV. This parameter strongly depends on the screen size and sound power (see above), however, it can be determined by other parameters — primarily additional features and technologies implemented in the design. It is worth noting that most modern LCD TVs are quite economical, and most often this parameter does not play a significant role — in most cases, power consumption is about several tens of watts. And even large models with a diagonal of 70 – 90" consume about 200 – 300 W — this can be compared with the system unit of a low-power desktop PC.
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