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Toshiba Regza 52XV645U Review


Description: 46" Full HD LCD TV
Resolution: 1920 X 1080
Reviewer: Jack Burden
Date: Fall 2009

Toshiba 52XV645U Review
The 52XV645U presents good brightness levels and slightly washed out flesh tones as evidenced by this shot from the DVD of Tristan and Isolde.

Price Considerations: The 52XV645U is well priced for its size and feature set - currently around $1500. With picture quality, and quality of those features thrown in to the mix, that price may become less attractive. The Samsung LN52B550 is priced the same also has fluorescent back lighting but no 120Hz rate option and sells for around $1600. The Samsung LN55B650 has an effective 120Hz rate feature but is priced a good bit more near $2400. LG's 55LH55 LCD has the 240Hz processing and is priced at around $1950. Lastly the Sony KDL-52W5100 has a similar feature set and sells for $2100. So Toshiba wins the contest for best price for features comparison.

Quality Considerations Highlights:


  • 1080p, 120Hz frame rate processing
  • Bright Picture
  • Decent Processing
  • Lots of Calibration settings allowing exact dialing in to D65
  • Nice looking


  • Volume output has a hollow sound
  • 120Hz feature does not appear to accomplish anything (there is considerable jerky motion lag from side to side fast moving images)
  • Severely impaired Viewing Angles
  • Shadow detail not great

Test and Optimum Viewing Distance: 14

Calibration: The Toshiba 52XV645U is a perfect example of how calibration can be essential to picture performance.

**Important Note: This TV comes out of the box tuned to Store calibration settings (100% Backlight and 100% Contrast). Tune to Home and follow the following Picture Settings to Calibrate to D6500. For lighter room settings use these settings but increase brightness and contrast by 5 to 10%.

Picture Settings
Picture Mode Movie
Color Temp 0
Brightness 24
Contrast 90
Color 16
Tint -2
Sharpness 0
Backlight 30
For complete picture settings including White Balance see the 52XV645U Calibration Page

720p/1080i/1080p HD Picture Quality: HD picture quality on the Toshiba XV645 is appealing, but not close to the best we've seen. Colors were much more subdued than many LCDs we've tested recently – adding realism. The HD presentation with this TV doesn't create that incredible contrast pop that we have enjoyed lately with some of our favorite TVs. As mentioned below in the Viewing Angle section, contrast is impaired at angles so viewing the picture from straight on is important.

Toshiba 52XV645U Review
Some grain and background noise can be seen in this dark scene from the 480i DVD Tristan and Isolde.

Up conversion from 480i: This picture quality test is importantly included due to its similarity with a cable or satellite non-HD digital signal. It's also a good test of this TVs 14 bit digital video processor. Black levels back off some compared to HD signals. There is more side to side jerky motion artifact apparent. With the right calibration softening up the picture some, it's not unbearable.

Toshiba 52XV645U Review
This natural outside shot from the 480i DVD Tristan and Isolde demonstrates good depth.

Black Level/Contrast/Contrast Ratio: With HD content through HDMI input black levels appeared saturated from front and center. However at angles this was not the case, especially with 480i input (see viewing angles section below). As well, post calibration contrast measured an average 471 at varying backlight levels – a poor result. Black levels with 480i input was considerably lighter, especially at side angles.

Dark Shadow Detail: Blacks were over saturated occasionally causing a deficiency in shadow detail.

Color Rendition/Color Accuracy: Flesh tones were less flush on this TV than many we've tested recently.

Viewing Angle/Off Axis Viewing: The XV645 contains an effective anti glare screen which may contribute to side angle viewing issues. Black levels and contrast do begin to degrade early on this TV at around 30 degrees. The noticeable impairment gets worse as the viewing angle widens. Blacks get hazier as contrast is compromised, taking the punch out of colors.

Motion Lag: There is jerky side to side motion artifacts visible especially with 480i signals, but also some HD content. The Clear Scan 120Hz function did not appear to have much of an effect. Turning this feature off and on yielded similar results related to motion lag.

Toshiba 52XV645U Review
There was visible judder effect in the two jets in the background as they crossed the sky in this scene from the Blu Ray of Iron Man.

False Contouring/ Mapping: We did not note mapping and contouring issues with the Toshiba's picture.

Features: This TV has 120Hz enabled frame rate conversion called Clear Frame which is best suited for sports programming. When using the TV in the Game picture mode, this feature is automatically turned off, so obviously Toshiba does not think it well suited to gaming. We usually recommend turning this feature off for film based programming though we did not notice the incredibly distracting background effects seen on some other 120Hz rate TVs.

Other new features include FocaLight LED backlight technology which automatically adjusts the backlight on the LCD depending on room light conditions. This will extend the life of the TV if you choose to use the feature, but using our suggested calibration settings will do the same. With a 60,000 hour avg. life usage, as long as your not maxing out the contrast and backlight settings, it probably isn't a concern. A nifty new feature I enjoyed is the ½ mute feature, enabled by pressing the normal mute button on the remote. The feature cuts the volume output in half allowing you to somewhat continue to watch the program while attending to the incoming phone call, or hear the kids in the other room.

Video Aspect Ratio Sizing: The picture size button on the XV645 remote controls video aspect options: Full, Theater Wide 1, 2, 3, Native, and 4:3. The Theater Wide 2 option did a nice job of algorithmically scaling The Fifth Element from 16:9 showing letterboxes to full screen without visible stretching. This is a nice set of options.

Audio Output: Sound output had a hollow, tinny note to it. Volume levels were not strong for a TV this size. The volume enhancement feature (found in Advanced Audio Settings) which we normally recommend, was in the On position out the box.

Inputs: 3 HDMI, 2 Component, 2 Composite, PC

Aesthetic Considerations: The XV645U is nice looking with less than one and half inch bezel frame width on top and just over that on the sides. The thin black frame is appealing. There is a unique silver/gray design element on the bottom of the TV that gives a slight 3 dimensional effect. The Toshiba logo is lit front and center bottom when the TV is on (may be turned off). The TV has a nice wall mounting depth of 3.6" with the input connections in a cavity to avoid adding more. The included table top stand comes attached to the TV, but does not swivel.

Remote Control/Menu Functionality: The 4 device universal remote is light and inexpensive feeling but has glow in the dark buttons and an ample set of option keys. The menu system is easy to use, however some of the more important options such as Advanced Picture Settings are well hidden and found by scrolling down to unseen areas in the Picture menu section. Once in Advanced Picture settings the user must continue scrolling down to unseen areas to access the important Clear Scan setting.

Toshiba 52XV645U Review
Finding the Clear Scan feature to turn it off can be challenging.

Audio Output: Sound output had a hollow, tinny note to it. Volume levels were not sufficient for a TV this size. The volume enhancement feature (found in Advanced Audio Settings) which we normally recommend, was in the On position out the box. This feature enhances voice based sound material. Not only did we not note an improvement with this feature turned on, voice output was very weak. This is one of those TV sound systems for which you will constantly tuning the volume up an down to hear voice, and turn down for surround volume.

Rating scale from 70 (denoting poorest quality) to 100 (signifying the very best quality). A rating in the 60s for any particular category of a product review indicates a serious defect which causes the product not to operate properly. Picture quality is double-weighted in the Overall Rating Score calculation.


Review Equipment Used: Sony Blu Ray BDP-S1 High Definition DVD player, Sony DVP-S50 DVD player, Sencore Color Pro 5000, Sencore Auto Cal Pro, Sencore signal generator.

This review format and all of the headings, sub headings and paragraph titles are part of a copyrighted process. Any unauthorized reproduction or use, either in full or in part, of this product review format is expressly prohibited.

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