Samsung UE48H6400 LED TV Review

Vincent Teoh

A retailer recently told us that seven out of every ten televisions sold to its walk-in customers are made by Samsung. If true, this statistic doesn’t surprise us at all, because from our testing over the past couple of years, no TV maker has been more consistent than the South Korean giant in churning out high-quality LED LCD TVs model after model.

Samsung UE48H6400

And the Samsung UE48H6400 we’re looking at today is a prime example of the company’s excellence. This 48-inch display doesn’t carry the most cutting-edge of styling, but its picture quality puts most similarly-priced rivals to shame. Among the H6400’s many praiseworthy attributes are deep blacks from a VA-type LCD panel, good backlight uniformity helped by direct-lit LED placement, a comprehensive array of calibration controls allowing for attainment of accurate colours, and impressive video processing.

Note: The design, on-screen display (OSD) menu, connections around the back, and remote controls on the UE-48H6400 are identical to those found on the smaller 40-inch UE40H6400 we reviewed back in May, so please refer to that article if you need more details or a refresher.

Technical Data


We used a profiled Klein K10-A meter, a DVDO AVLab TPG signal generator, and SpectraCal’s CalMAN 5.3 software to calibrate our Samsung UE48H6400AKXXU review unit in its most accurate picture preset, namely [Movie] mode.

The first-rate picture-affecting controls provided by Samsung allowed us to align greyscale to D65, gamma to 2.4, and colours to Rec.709 standard, resulting in no visible inaccuracies in real-life viewing.

Pre-calibration RGB Tracking
Pre-calibration Delta errors
Pre-calibration RGB tracking and delta errors (dEs)
Post-calibration RGB Tracking
Post-calibration Delta errors
Post-calibration RGB tracking and dEs in [Movie] mode
Pre-calibrated Gamma tracking in [Movie] mode Post-calibrated Gamma tracking in [Movie] mode
Pre-calibration gamma tracking (2.21)Post-calibration gamma tracking (2.41)
Post-calibration Colour saturation tracking in [Movie] mode
Post-calibration colour saturation tracking
Post-calibration colour errors in [Movie] mode
Post-calibration colour errors (<3 not appreciable to the eye)

Benchmark Test Results

Dead pixelsNone
Backlight uniformityGood: no corner bleed or clouding; mild DSE
Overscanning on HDMI0% with [Picture Size] set to “Screen Fit
Blacker than blackPassed
Calibrated black level (black screen)0.046 cd/m2
Calibrated black level (4×4 ANSI)0.046 cd/m2
Black level retentionStable
Primary chromaticityExcellent
ScalingVery good
Video mode deinterlacingEffective jaggies reduction
Film mode deinterlacingPassed 3:2/480i & 1080i; and 2:2/576i
Viewing angleDecent for VA LCD
Motion resolution1080 with [Motion Plus] engaged; 300 otherwise
Digital noise reductionOptional; effective when engaged
SharpnessDefeatable edge enhancement
Luma/Chroma bandwidth (2D Blu-ray)Full luma; chroma horizontally blurred
1080p/24 capabilityNo judder in 2D
Input lag (high-speed camera)37ms compared to lag-free CRT
Leo Bodnar input lag tester43ms
Full 4:4:4 reproduction (PC)Yes, with 60hz signal and “PC” input label

Power Consumption

Default [Standard] mode79 watts
Calibrated [Movie] mode74 watts
Standby<1 watt

Black Level

The Samsung UE48H6400 uses a VA LCD panel which paints a deep shade of blacks by LED LCD standards. After fixing peak 100% white to 120 cd/m2, native black level measured 0.046 cd/m2 on both a full-field video black scene and a 4×4 ANSI chequerboard pattern.

Subpixel structure
Subpixel structure indicating VA LCD matrix

Unlike most LED TVs we encounter (including the 40in version), our 48H6400 review sample did not shut off its LEDs when asked to display full-screen black. While commendable, we’re not sure if this behaviour was specific to our individual unit, the screen size or the firmware.

Backlight Uniformity

After calibration, we did not witness any backlight bleed or clouding on our 48in H6400 sample – its direct-lit LED configuration likely helped in this regard. Some dirty screen effect (DSE) was present during panning shots across tonally uniform backdrops (for instance a football field), but in our experience this is par for the course for larger LED LCD televisions, unless you’re willing to fork out a significant premium for a direct LED set with full-array local dimming (FALD) such as the Panasonic AX902/ AX900.


Enabling [Motion Plus] even at its lowest setting of “Clear” boosted motion resolution to 1080 (as judged using the horizontally scrolling lines test card in Chapter 31 of the FPD Benchmark Software disc) from the usual LCD baseline of 300. However, we could still see mild soap opera effect (SOE) with [Motion Plus] “Clear“, so we recommend either switching [Motion Plus] off completely for 24fps content like Blu-ray movies, or engaging the “Custom” option with a high [Blur Reduction] value but [Judder Reduction] set to “0“.

Inside the [Motion Plus] “Custom” submenu is also where [LED Clear Motion], i.e. Samsung’s backlight scanning system, resides. Although activating this option increased motion clarity without introducing any SOE or interpolation artefacts, there’s visible flicker and drop in brightness that would deter most viewers.


Various high-def material, be them Blu-rays or Freeview HD broadcasts, looked supremely impressive on the UE48H6400, what with its velvety blacks, 2.4 gamma and neutral greyscale that contributed greatly to a tint-free image boasting tons of “pop” and depth. The TV’s colour palette appeared rich yet never unnatural, with only a small tweak to the [Flesh Tone] control required to reproduce realistic skin tones.

One area of concern that has been raised by existing Samsung H6400 owners is lip-sync delay, particularly from the inbuilt tuner where no correction via an external receiver is possible. With the latest firmware version (at time of testing) of 2120 loaded on our set, we didn’t experience this issue throughout the many SD and HD channels we sampled. Yes, look (and listen) hard enough and you’ll notice a very slight discrepancy between picture and sound, but it never bothered us in real-world viewing.


The Samsung UE-48H6400 ships with two pairs of active-shutter 3D glasses (flat-packed, requires assembly). While the overall extra-dimensional experience was decent thanks to full HD 3D resolution, non-intrusive crosstalk and minimal flicker, the 3DTV presented 24Hz and 50Hz content with some judder in the third dimension. To eradicate the judder, [Motion Plus] needed upping to “Standard“, though of course this would introduce soap opera effect to films.

We’ve seen (and written about) this 3-D frame rate handling problem on every LCD-based 3D TV from Samsung, so it seems the manufacturer just isn’t interested in improving the tri-dimensional performance of its televisions.


Our Leo Bodnar input lag tester returned a figure of 43ms from the 48″ H6400 with [Game] mode engaged. Renaming the HDMI input label to [PC] did not reduce the lag below 43ms.

Input lag

Outside [Game] and [PC] modes, input lag rose to 81ms which hampered responsiveness for playing video games.


There were times we sat transfixed in front of the Samsung UE48H6400, scarcely believing the outstanding picture quality we’re seeing from this eminently affordable set. At a street price of around £600, we cannot recommend it highly enough.

Highly Recommended