The difference between the OLED55B7A vs OLED55C7P is limited to their design and sound. The OLED55B7A and OLED55C7P have the same picture quality, owing to the identical OLED panel used in both TVs.

Design: Silver Bezel (OLED55B7A) vs Black Bezel (OLED55C7P); Stand with support column and flat base (OLED55B7A) vs Trapezium Stand (OLED55C7P)

The trapezium stand of the OLED55C7P is made of aluminum, and has a brushed metal finish. Owing to its form factor, the stand provides certain elevation without a dedicated pedestal. Specifically, the clearance beneath the screen is about 1.5 inches when the OLED55C7P is mounted on a table-top surface. The bezel around the screen on the OLED55C7P is black, which is noteworthy because it’s one of the differences between the OLED55B7A and OLED55C7P. In comparison, the bezel on the OLED55B7A is silver. Furthermore, the stand on the OLED55B7A consists of a clear plastic pedestal and a base that is black. This setup provides a clearance of approximately 2 inches beneath the screen of the OLED55B7A, which makes it slightly more elevated when placed on a table-top surface compared to the OLED55C7P. Both the OLED55B7A and OLED55C7P can be wall-mounted using a 300×200 VESA compatible wall mount (not included with any of them).

Sound: 4.0 Channel (OLED55B7A) vs 2.2 Channel (OLED55C7P)

The other major differentiator between the OLED55B7A and OLED55C7P is sound quality. Although the total audio power output is 40 Watts for both the OLED55B7A and OLED55C7P, they allocate it differently. The reason being is that the OLED55B7A has a 4.0 channel speaker system whereas the OLED55C7P utilizes a 2.2 channel speakers. In other words, 20 Watts are allocated to the subwoofers on the OLED55C7P. The OLED55B7A, on the other hand, lacks subwoofers so all 40 Watts are dedicated to its speakers. By omitting the subwoofers, though, the OLED55B7A has a reduced capacity for reproducing the low frequency band in comparison to the OLED55C7P.

Dolby Atmos decoding (OLED55C7P only) and pass-through (OLED55B7A and OLED55C7P)

The OLED55B7A and OLED55C7P differ in how they can handle Dolby Atmos tracks. Only the OLED55C7P has a Dolby Atmos decoder. This means that the OLED55C7P is able to decode audio tracks in this object-based audio format for playback via its internal speakers. The OLED55B7A, on the other hand, doesn’t have this ability. That being said, you can pass-through Dolby Atmos to a compatible receiver or sound bar. This is possible with both the OLED55B7A and OLED55C7P provided the source is a streaming service, cable/broadcast TV or USB storage. When it comes to Dolby Atmos tracks from Blu-ray discs, however, you’ll have to update the firmware of your TV in order for this functionality to added since the OLED55B7A and OLED55C7P don’t have a built-in support for Dolby TrueHD, which is used in Dolby Atmos encoded Blu-ray discs.

HDR format support: HDR10, Dolby Vision, HLG (OLED55B7A and OLED55C7P)

Unlike with Dolby Atmos, there is no difference between the OLED55B7A and OLED55C7P when it comes to Dolby Vision, which is one of the HDR (High Dynamic Range) formats that both TVs are compatible with. Dolby Vision titles are mastered for a peak brightness of 4,000cd/m2, and include dynamic metadata in order to allow an optimal use of the more limited brightness range of display devices such as the OLED55B7A and OLED55C7P by the means of scene-by-scene (or even frame-by-frame) optimization. The quantization of the dynamic range is needed because the OLED55B7A and OLED55C7P can reach up to 800cd/m2 in small specular highlights with neutral color temperature. HDR10 is also supported by the OLED55B7A and OLED55C7P, but this format includes only static metadata, meaning it’s only optimized for scenes where specular highlights of either 1,000cd/m2 or 4,000cd/m2 are present. In order to prevent scenes without highlights from being rendered unnecessarily dark (due to the PQ (Perceptual Quantizer) EOTF tracking on the OLED55B7A and OLED55C7P being set to resolve highlight details up to 4,000cd/m2), both LG OLED TVs are equipped with Active HDR processing. If you choose to use it, the OLED55B7A and OLED55C7P will analyze the HDR10 (or HLG) signal, and generate dynamic metadata on the fly.

Identical Picture Quality on the OLED55B7A vs OLED55C7P: Perfect Black / Pixel level dimming, Cinematic Color, Billion Rich Colors, Wide Viewing Angle, Ultra Luminance

The OLED55B7A and OLED55C7P use the latest generation W-OLED panel from LG.Display which translates to identical picture quality on both TVs. The Perfect Black level on the OLED55B7A and OLED55C7P stems from the pixel level dimming that self-emissive displays are able to perform, and in particular: the ability for individual pixels to be completely turned off. No light is emitted from the OLED55B7A and OLED55C7P when they display black, hence the perfect black level. Besides the infinite contrast ratio, the 0cd/m2 black level on the OLED55B7A and OLED55C7P provides the perfect canvas for showcasing another feature that the two OLED TVs have in common: Cinematic Color. The name is a reference to the fact that the OLED55B7A and OLED55C7P cover approximately 99% of the DCI-P3 (Digital Cinema initiative) color space. Since Ultra HD Blu-ray discs typically use this gamut (within BT.2020 container), the OLED55B7A and OLED55C7P are able to display colors without any significant tone-mapping, thus allowing you to watch Ultra HD Blu-ray titles the way the director (and the colorist) intended them to be seen in terms of color. Furthermore, the OLED55B7A and OLED55C7P are able to display Billion Rich Colors thanks to the utilization of 10-bit panels. Both the OLED55B7A and OLED55C7P have wide viewing angles. They don’t exhibit any raise in the black level, or any significant brightness decrease when viewed off-axis. The OLED55B7A and OLED55C7P maintain color saturation at an angle up to a certain point, but if watched from more than 45 degrees off-axis, some shift in colors can be observed. The Ultra Luminance technology is also present on the OLED55B7A and OLED55C7P. On a full-field white (100% window size), they can reach approximately 150cd/m2. In small areas of the screen (e.g. 5% window size), the peak brightness is significantly higher: up to 800cd/m2 (D65 white point). The latter is only relevant for HDR content since SDR is typically mastered for 100cd/m2.

Motion and games: The OLED55B7A and OLED55C7P are equally suitable for watching sports and playing games.

Due to the native refresh rate of 120Hz and pixel response time of approximately 0.1 ms, the OLED55B7A and OLED55C7P are able to show fast moving sequences without the type of motion blur that occurs when pixel transitions are not completed within the time frame (i.e. 8.3 ms in 120hz TVs) of the refresh cycle. Furthermore, they both employ motion compensated frame interpolation which is controlled via the TruMotion menu entry. It’s possible to adjust the De-Judder and De-Blur separately in the User sub-menu, which is especially useful for avoiding stutter when watching low frame rate content (e.g. 24p movies). In terms of gaming, the OLED55B7A and OLED55C7P have approximately 21 ms of inputs lag, so there is no significant delay from the moment you press a button, for example, to when your input is reflected on the screen.

Same Smart TV system and number of inputs on the OLED55B7A and OLED55C7P

They both use the webOS 3.5 Smart TV platform which is very intuitive to use, not least because the point-and-click functionality the Magic remote provides. This motion sensing remote is included with the OLED55B7A and OLED55C7P. There is a scroll-wheel and a built-in mic on the Magic Remote so that you can quickly navigate and search for content (natural voice recognition is supported). The OLED55B7A and OLED55C7P have the same number of inputs. That being said, there is a difference as to where some of them are placed. For example, 2 of the HDMI inputs on the OLED55B7A are rear-facing while the other 2 are side-facing. The OLED55C7P, on the other hand, has 3 side and 1 rear HDMI ports. All 4 HDMI inputs on both TVs are HDCP 2.2 compliant. The single USB 3.0 port is side-facing on both TV but the two USB 2.0 ports are positioned differently. On the OLED55C7P both of them are on the back whereas on the OLED55B7A one USB is rear-facing and the other one is side-facing.

Check availability and pricing on Amazon.com for the OLED55B7A and OLED55C7P (affiliate links).

2 thoughts on “OLED55B7A vs OLED55C7P

  1. Steve

    Best Buy showed me on 11/10/17 hardcopy printed LG spec sheets that show that the speakers of the B7P and C7P are identical. So who knows whether to believe their web site, or hard copy documents provided to retailers.

    1. tvevaluate Post author

      The speakers on the B7P and C7P are indeed identical. However, the B7A has different speakers from the B7P and C7P.

      Hope that helps.


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