televisions

Panasonic TC-P42GT25 3D Plasma HDTV Review

42 in.

The TC-P42GT25 slightly underperforms compared to the VT20 series we reviewed earlier this year.

Our editors review and recommend products to help you buy the stuff you need. If you make a purchase by clicking one of our links, we may earn a small share of the revenue. Our picks and opinions are independent from any business incentives.

Black Level

The Panasonic TC-P42GT25 did well in producing a deep black level. Looking at the chart below, it's important to know that small increments make a big difference, because the scale is logarithmic rather than linear. The Panasonic TC-P50VT20 was very, very, good, and difficult to top. But you can feel confident that both of these Panasonic plasma displays are great performers. More on how we test black level.

Black Level Chart

Peak Brightness

The Panasonic TC-P42GT25, like many plasmas, had some troubles producing a bright enough screen. The issue is that plasma screens get hot, and a big, white screen requires more power output than any other color. In order to keep from getting dangerously hot, as the white content increases in screen size, the overall brightness is reduced. You probably won't notice a problem unless you put it right next to an LCD screen (in which case, you can really see a difference and might lose heart). More on how we test peak brightness.

Peak Brightness Chart

Contrast

The Panasonic TC-P42GT25 proved to have a contrast ratio of approximately 1572:1, which is not the best performance we've seen. However, it's not too far behind the more expensive Panasonic TC-P50VT20. Both of these plasma TVs were hurt by their poor peak brightness performance, discussed in the section above. More on how we test contrast.

Contrast Chart

Tunnel Contrast

The Panasonic TC-P42GT25 showed some minor problems with maintaining a consistent black level, which is typical of plasma TVs. As the black area gets smaller, surrounded by bright white areas, the black level gets brighter. LCDs typically don't have this issue. More on how we test tunnel contrast.

Tunnel Contrast Chart

White Falloff

The Panasonic TC-P42GT25 also showed some problems with maintaining a consistent peak brightness, another issue with plasmas. When the screen percentage of white content increases,the brightness is intentionally dimmed in order to keep the screen from overheating. More on how we test white falloff.

White Falloff Chart

Uniformity

The Panasonic TC-P42GT25 has a great screen uniformity, like most plasma TVs. Because LCD screens have zoned backlighting, the illumination can be uneven. But plasma pixels are each backlit individually. More on how we test white falloff.

Greyscale Gamma

The Panasonic TC-P42GT25 showed some slight issues with the greyscale performance, which is how well the TV transitions from black to white. Look at the chart below. What we're looking for, first and foremost, is a smooth line. The line in the TC-P42GT25's performance has some obvious wobbles, but not more than most TVs. In the upper-right edge of the line, it becomes horizontal. This indicates that the TV fails to display any detail in the brightest portions of the signal. Overall, though, we were pleased with the performance, particularly it's ability to retain detail in the shadows. More on how we test greyscale gamma.

Greyscale Gamma Chart
Our editors review and recommend products to help you buy the stuff you need. If you make a purchase by clicking one of our links, we may earn a small share of the revenue. Our picks and opinions are independent from any business incentives.

Sections

  1. Introduction
  2. Tour & Design
  3. Blacks & Whites
  4. Color Accuracy
  5. Motion
  6. 3D
  7. Viewing Effects
  8. Calibration
  9. Remote Control
  10. Connectivity
  11. Audio & Menus
  12. Multimedia & Internet
  13. Power Consumption
  14. Panasonic Viera TC-P50VT20 Comparison
  15. Samsung UN46C7100 Comparison
  16. Sony Bravia KDL-46HX800 Comparison
  17. Conclusion
  18. Series Comparison
  19. Photo Gallery
  20. Ratings & Specs
Our editors review and recommend products to help you buy the stuff you need. If you make a purchase by clicking one of our links, we may earn a small share of the revenue. Our picks and opinions are independent from any business incentives.
Advertisement - Continue Reading Below
Our editors review and recommend products to help you buy the stuff you need. If you make a purchase by clicking one of our links, we may earn a small share of the revenue. Our picks and opinions are independent from any business incentives.
Advertisement - Continue Reading Below

What's Your Take?

All Comments