Group test: 40-42in TVs

Once upon a time not so long ago a round-up of TVs at the sort of size point we're looking at today would have been pretty simple. It would have consisted of all 42in models rather than including any 40in ones, and it would have consisted entirely of plasma technology. Today, of course, LCD technology's relentless push for global domination has seen it muscle in on plasma's traditional large-screen patch in no uncertain terms. So much so, in fact, that within this group of four 40-42in screens, the split of plasma and LCD models is a clear 50/50. But when the two plasma contenders include a new full HD model from the mighty Panasonic and one of Pioneer's new KURO efforts, victory for the LCD assaulters is far from guaranteed… Overview Price comparison: JVC LT-42DV8BJ More info: JVC Size: 108(d) x 672(h) x 1030(w)mm Weight (inc stand): 22.7kg Native aspect ratio: 16:9 Claimed max contrast ratio: 1000:1 Claimed max brightness: 500cd/m2 Connections: Three v1.3 HDMI inputs (with CEC), two Scarts (both RGB), component video input, composite video input, S-Video input, D-Sub PC input, Stereo audio output, headphone jack, stereo audio inputs, CAM slot, RF input, digital audio output, service port JVC LT-42DV8BJ As well as sporting a full HD pixel count, JVC's LT-42DV8BJ LCD TV actually marks a technological first for the brand in its use of 100Hz processing. The idea behind this is that doubling the usual PAL refresh rate from 50Hz to 100Hz should counteract the resolution-reducing effect of LCD's slow response time when showing moving objects. The 42DV8BJ is also distinguished by JVC's DynaPix HD processing, which works to boost resolutions, noise reduction, colour tones/saturations; and contrast. Surprisingly, though, this contrast adjustment does not include an automatic backlight system whereby the TV's brightness could be reduced during dark scenes to boost black levels. The 42DV8 is an attractive looker in a retro way, and comes sporting a seriously healthy array of ports including three v1.3 HDMIs, making them compatible with HDMI 1.3 functions like Deep Colour and auto lip synching. The 42DV8's 100Hz system turns out to be superb, as even fast-moving footage like a Premiership football game is shown with a fluidity and clarity that's rare if not unprecedented in the LCD world. Even better, this improved motion is produced without any negative side effects. The 42DV8's pictures also stand out for their HD sharpness and detailing, while the DynaPix HD system even helps the TV deliver a reasonably sharp standard definition picture as well. Yet more good news comes with the 42DV8's unusually strong colour performance, which combines rich, natural saturations with some acutely subtle blends thanks to the full HD resolution. While its 100Hz system successfully counters one LCD weakness though, the 42DV8 falls prey to two others. First and worst, black levels really aren't great, resulting in the all-too-familiar grey mist over dark scenes. The other issue finds the 42DV8's pictures losing considerable colour saturation and contrast if watched from much of an angle. To finish on a high, though, the 42DV8's audio talents are outstanding, with levels of bass handling, power and clarity that leave all its rivals today sounding flimsy by comparison. It's just a shame that this sound and the set's 100Hz talents are let down in other areas. Verdict Plus points Superb 100Hz processing, good looks, great connectivity, plenty of features, sharp HD pictures, great sound Minus points Average black levels, viewing angle limitations

Overview Price comparison: Panasonic TH-42PZ700 More info: Panasonic Size: 1020(w) x 680(h) x 97(d)mm Weight: 38kg Native aspect ratio: 16:9 Claimed max contrast ratio: 5000:1 Claimed max brightness: N/A Connections: Three HDMI inputs, three Scarts (2 RGB), component video input, composite video input, S-Video input, D-Sub PC input, Stereo audio output, headphone jack, stereo audio inputs, RF input, Digital audio output, CI slot Panasonic TH-42PZ700 The 42PZ700 is potentially one of the most exciting plasma screens ever. Why? Because it's the first 42in model we've seen to support a full HD resolution, overcoming the traditional problems with making plasma chambers small enough to fit 1920x1080 pixels into such a relatively small screen. Also, as one of Panasonic's premium plasma range, the 42PZ700 is impressively specified. The full HD pixel count is driven by Panasonic's excellent V-Real Pro image engine, for starters, complete with 1080p handling, 12-bit colour processing resulting in a claimed 4,096 greyscale gradations, and multiple noise reduction routines. The set's claimed contrast rating looks surprisingly low by plasma standards at 5000:1 - but don't forget that this is achieved without the need for any 'backlight brightness reduction' systems like those seen with LCD technology. Connections on the 42PZ700 are excellent, with three HDMIs, a PC interface, a component video input, and even an SD card slot for playing not only JPEG stills but also AVCHD-format video. Settling down to watch the 42PZ700 suggests that really the 5000:1 contrast ratio isn't a concern at all. Black levels are excellent, avoiding the common flat TV greyness and delivering plenty of shadow detailing. Such impressive black levelling also results in an unusually wide colour palette, helped along further by the extra blend finesse made possible by the full HD extra pixel density. The full HD resolution also, as we'd hope, helps the 42PZ700 reproduce a clarity and sharpness with HD sources that's clearly - if only marginally - better than anything we've seen before on a 42in plasma TV. This clarity is enhanced, too, by plasma's freedom from LCD's motion-spoiling response time issues. With the 42PZ700 proving largely resilient to common plasma noise types like dot crawl and fizzing noise over horizontal motion, and handling standard definition admirably, our only picture niggle is that some reds can look rather orange. It's perhaps debatable if the 42PZ700's prowess quite justifies its slightly high £1,900 price. But certainly not in doubt is the fact that this is one mighty fine telly.

Verdict Plus points Great picture quality, features galore, full HD resolution Minus points Panasonic's non-HD models have slightly deeper black levels; the advantage of full HD is only marginal, making the price look slightly high

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