Sharp GK4245K (70GK4245K) review

We’re pretty used by now to TVs equipped with Tivo smart systems coming in at the more affordable end of the market.

Even knowing that, though, didn’t fully prepare us for Sharp’s 70GK4245K: a Tivo-toting TV with a 70-inch screen that costs just £489.

Surely a screen size to price ratio this extreme can’t actually be fun to watch, can it?

Price

It’s still rare for even 55-inch TVs costing under £500 to arrive in our test rooms, yet here we find ourselves staring at a 70-inch screen that costs just £489 (around $660 / AU$1000).

The 70GK4245K doesn’t look like it’s going to be just another ‘it makes a picture, what more do you want?’ budget TV, either.

For instance, its 4K screen can also take in the Dolby Vision high dynamic range format, its audio system can handle Dolby Atmos tracks, and its already content-loaded Tivo smart system is backed up by the latest Freely platform. Truly, our budget TV cup runneth over. So long as there’s also some sort of quality to its pictures, of course.

The 70-inch screen size is pretty rare these days, with most brands offering 65 and 75-inch options instead. Couple this with its ultra-affordable price, and direct competition for the 70GK4245K is hard to find.

If Tivo is the most important thing to you and you can resist the 70-inch screen, Sharp also has a decent little 43-inch Tivo model, the 43GM6245K, that can be yours for under £250, while Bush’s 50-inch 50UT24SB Tivo set is also an engaging all-rounder currently going for £319 on Amazon.

If strong picture quality is more important than Tivo, TCL’s 65-inch 65P755K is very good value at £449 at the time of writing, and as new replacement models are just around the corner, even the 75-inch can be had for just £549 if you get a move on.

Design

It became obvious as we were setting up the 70GK4245K that its build quality is pretty flimsy. Anyone with a sufficient wingspan should easily be able to pick it up and move it around without the need for a second pair of hands. Its bezel is on-trend thin around three of its sides, though, while the slightly wider bottom edge looks glossy enough to just about persuade you that maybe the TV isn’t entirely made of plastic after all.

The rear is fairly chunky by modern TV standards, making it a rather cumbersome wall hanging option. Though VESA wall mounting points are of course present, if that’s really the way you want to go.

The desktop feet provided with the 70GK4245K look OK in a no-nonsense kind of way, but infuriatingly, the only attachment point for them is right out near each bottom corner, meaning the TV can only sit on a bit of furniture that’s almost as wide as the TV. Which is no joke when that TV is a 70-inch model.

The GK4245K ships with a remote control that’s basically as plasticky and lightweight as the TV. A brushed finish for the main front plus a faux metallic look to the central cursor navigation section, though, just about succeed in making the handset look posher than it really is.

Features

We’ve covered the Sharp 70GK4245K’s headline claims already: namely that it delivers a 70-inch screen, Tivo/Freely smarts and Dolby Vision HDR (as well as the core HDR10 and HLG formats of HDR, of course) for the mind-bogglingly low price of £489. More detail is needed on some of those features, though – and, surprisingly, there are quite a few other things going on with this budget set, too.

The LCD panel used for the 70GK4245K appears to be a VA one rather than a low-contrast IPS one, for starters. It’s not clear whether the set is direct or edge lit, though the way some clouding appears over the picture’s edges (more on this later) suggests that it may be the latter. At any rate, there’s certainly no evidence of local dimming going on – which we wouldn’t expect there to be, of course, on such an incredibly affordable TV.

There is a global dimming system at work, however, which Sharp claims can deliver a dynamic contrast ratio of 1,000,000:1. We can tell you now that this is an extremely optimistic figure, mind you, that’s based on mathematical potential rather than real-world performance.

The GK4245K only has a native 60Hz panel, so you’d think there would be no potential for high frame-rate gaming support through any of the provided three HDMI ports. Actually, though, a connected Xbox reveals that the TV can support 120Hz refresh rates – albeit only at 1080p resolution, and without any HDR support. You can retain HDR – including Dolby Vision – with 4K gaming feeds at 60Hz max, just to be clear.

The HDMIs support ALLM switching when a game source is detected, as well as VRR, and input lag in the Game mode is a very snappy 14.8ms.

Other connections include a couple of USBs, an Ethernet port, a 3.5mm headphone jack, an IR remote control extender, an optical digital audio output, and even a blast-from-the-past mini composite video/stereo audio input. Plus, of course, there’s built-in wi-fi to feed the Tivo smart system.

The GK4245K’s Tivo implementation shows no signs of any budget TV-related compromises. It runs as slickly and stably as any other version we’ve seen, and it carries the usual impressive array of apps and sources.

These include Netflix, Disney+, YouTube, Prime Video, Rakuten, BBC iPlayer, ITVX, All4, My5 and the Freely platform, which essentially lets you live-stream many of the TV channels on the Freeview HD broadcast platform – as well as providing on-demand access to many tens of thousands of hours of catch-up programming from Freeview’s main channel providers.

The only really striking absentee from Tivo’s app list is Apple TV+. You can now access Apple TV through the Prime Video app, but the quality of the feeds you get that way doesn’t seem as good as those you get through direct Apple TV apps.

It’s worth adding that Tivo also supports arguably the most straightforward, intelligent and helpful voice recognition/content search system in the TV world.

Surprisingly, finally, the GK4245K carries a few quite premium picture adjustment features. There’s a 10-bit colour feature for smoothing out potential banding in HDR colours, for instance, as well as a pair of customisable Dolby Vision modes on top of the more predictable Dolby Vision Dark and Bright options.

There’s even support for a full calibration thanks to both 2-point and 11-point white balance correction, plus hue, saturation and brightness adjustments for the red, green, blue, yellow, cyan, magenta and flesh tone colour elements.

Picture

The GK4245K’s pictures turn out to be a really pleasant surprise in most ways. For starters, they’re substantially brighter than we’d anticipated based on our experience of other similarly ultra-affordable TVs. This expresses itself in both enjoyably crisp and punchy highlights within HDR pictures, and respectable sustained brightness with full-screen HDR bright shots.

You’re not witnessing by any means the full range and impact of HDR’s light range, to be clear. But you do get enough of it to help pictures look reasonably natural and engaging rather than the dull compromise we’d honestly expected to see. What’s more, while it’s hard to imagine Sharp has equipped a TV as cheap as the 70GK4245K with a particularly clever HDR tone mapping system, HDR pictures feel nicely balanced and don’t suffer excessively with clipping (lost shading and colour tone subtleties) in their brightest parts.

Even more surprising, the healthy brightness the GK4245K manages to find for HDR playback doesn’t come at the expense of convincing dark scenes. The amount of greyness that creeps into parts of the picture that should look black really isn’t excessive at all, despite the screen’s lack of advanced light control tools.

What’s more, provided you don’t use the Dolby Vision Dark picture setting, shadow detail remains abundantly present in even the darkest corners. This helps dark scenes look almost as natural and full of depth and detail as bright ones, resulting in a much more consistent viewing experience than we’d expected to find on such an affordable big-screen TV. Though the ‘almost’ back there is doing some slightly heavy lifting, for reasons we’ll get to in a moment.

Another very pleasant surprise about the GK4245K is how sharp and clean its pictures look. Part of this is a result of the screen’s surprisingly subtle colour handling. There’s no wide colour gamut coverage or Quantum Dots here, yet the screen handles even the most subtle of blends and tonal shifts without the sort of striping, blocking or ‘clumping’ we’d anticipated at this price point. You don’t even need to call in the set’s 10-bit colour emulation feature.

Motion is also handled quite well for such a cheap TV. There’s a touch of blur if a fairly large object moves at speed across the screen, but this never turns into actual smearing or lagginess, and there’s enough finesse in the screen’s shading and enough native sharpness in the core 4K delivery to stop even action scenes from starting to look truly soft.

As well as containing more shading subtlety than expected, colours look consistently balanced, with no tones standing out too strongly against the rest, and no aggressive blue or green wash hanging over proceedings. As with the GK4245K’s brightness, we’re not seeing the full range of tones and saturations HDR can provide, but we’d take a holistic, balanced approach to colours like the GK4245K provides over some more heavily saturated but also gaudy and uncontrolled mess any day.

Add to the mix some surprisingly clean upscaling of SDR sources that holds up even on a screen as big as this one, as well as slightly more forgiving viewing angles than we’d expected, and you can see why we’re such fans of the 70GK4245K’s pictures for its money. The only thing stopping us from giving it five stars, in fact, is something we’ve alluded to a couple of times before: backlight clouding.

Extraneous light creeps into dark scenes in a number of areas – mostly at the screen’s edges, but also in a couple of more central spots. These light pools disappear entirely during bright footage, and they’re really the only significant issue we have with the GK4245K’s budget pictures. But they can be distracting enough during very dark sequences to cost Sharp’s TV one full picture mark.

Sound

The 70GK4245K’s sound can’t repeat its picture heroics. Audio struggles to escape the TV’s bodywork even at full volume, leaving action scenes and dense musical scores sounding quite swallowed and thin.

The way the sound feels trapped inside the GK4245K’s speakers, even with Dolby Atmos mixes, also means dialogue can sound a bit detached from the onscreen action, and given that Sharp’s TV doesn’t produce a particularly compelling midrange, you won’t be shocked to learn that there’s practically no bass presence.

The GK4245K’s sound is at least operating within the limitations of its speakers, though, meaning that even the most bombastic Hollywood moments don’t cause low-frequency distortions or treble harshness. So while we’d have loved much more sheer oomph from the 70GK4245K’s sound, what we’ve got does at least not sound broken.

Verdict

No 70-inch TV costing £489 is ever going to be perfect.

In the Sharp 70GK4245K’s case, that means having to put up with some backlight clouding in dark scenes and an uninspiring built-in sound system.

Putting up with these relatively minor issues is made surprisingly easy, though, thanks to both an excellent Tivo smart system and an overall level of picture quality that really has no business turning up on such an affordable home cinema-sized TV.

SCORES

• Picture 4
• Sound 3
• Features 5

MORE:

Read our review of the Sharp 43GM6245K

Also consider the TCL 65P755K or 75P755K

Read our Bush 50UT24SB review

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