The InFocus SP8604 looks like a very promising proposition. It should have the latest DLP darkchip technology on-board, a choice of lens options to help with installation, a 6 segment colour wheel to help reduce rainbow side effects, a claimed 1700 lumens light output, 10 bit processing and a very decent price tag. But, as we are about to find out, not all things are made equal. You can read the full review after the summary and scores.
Design, connections and set up
The supplied remote control is a plastic affair with well laid out and logical buttons. Whilst it feels cheap the remote is responsive and fast, when pointed at the screen, and all the major controls are where you would expect them to be. It is also backlit to help navigation in your cinema room bat cave environment.
Moving to the rear of the unit and we have the video connections. Here we have a generous three HDMI slots, one set of component video sockets and legacy S-Video and composite connections. There is a USB connection which is for service only, along with a PC/VGA input, an RS232 control port and two 12v triggers. For the vast majority of installations and users there are more than enough connection options available here.
Set up of the SP8604 is again very easy to achieve once the projector is in the correct position where we will require the minimum (if any) adjustment of the lens shift. Never install a projector and use the keystone correction as this immediately adds in picture artefacts to the image, even if they are not apparent to the eye straight away with content playing. Stick up a multi-burst HD test pattern and move the control one click on the keystone and our advice will become apparent straight away. We have to keep repeating this point in projector reviews as there are some set up guides out there advocating the use of this control to your images detriment.
The lens shift offers +/-10% shift on the Horizontal plane and +20% and -40% on the vertical. This should be enough cover to get the SP8604 installed into even the most awkward of rooms, but as we always say, take your time and plan the positioning as per the manufacturers specifications. Correct installation of any projector is paramount to getting the best out of it, so if you need assistance with this, find a good dealer who offers it as part of their service. Again with lens zoom and focus it is a manual affair at this price point and is easy enough to set up correctly. If you have an anamorphic lens system, the SP8604 will also oblige with a picture stretch mode and you can use the triggers to control masking and/or lens sleds.
The lens used on the SP8604 (we tested the standard option) is of good quality and offers a nice sharpness to images at this price point. The fact that you have a choice of three lens options is a nice design point and helps make the InFocus an ideal model for the custom installation market. The projector also uses dynamic black technology with a dynamic iris to help improve the black levels on offer by changing scene by scene. This is married to the UNISHAPE lamp with its claimed millisecond adjustments in light intensity. Of course, as purists, we look at such technology with sceptical eyes as we would like the display to offer natively good blacks and contrast before any electronic trickery is involved, but we have to be complete in our assessment of what is here, even if we switch everything off again!
Measured results out of the box
With no manual white balance controls on the SP8604 much will depend on the result above and as we can only test this sample for review, we cannot say that other samples will perform the same out of the box, which is why manual controls are so important. With this sample the Normal white balance setting produced a very good greyscale result which was very close to being perfect in terms of tracking and deltaE errors. We have errors at 3 and under and in most cases this would mean that errors would not be perceived by most viewers. Gamma sadly didn’t track any better towards our desired 2.2 target, but again it wasn’t a massive error that would give that much of an impact. Personally I would aim a little higher in our review room conditions. So, certainly on this sample the out of the box results were excellent, but we cannot confirm if this would be the case with other samples.
Looking at the colour gamut we ideally want to have the correct co-ordinates for Rec.709 playback for film and TV. However, the gamut performance is not great out of the box with some pretty big errors that are visible on screen. Red is over saturated which adds too much rosiness to cheek bones and Green has a large hue error and off saturation so grass, and so on, just doesn’t look correct. There are other errors such as blue which our guess is caused by the colour wheel as blue is very difficult to get correct in such circumstances, so it is over saturated but, in mitigation, blue is the colour we least find offensive in terms of errors to our eyes. DeltaE errors as you would guess are quite large especially in hue and saturation. So out of the box we don’t find any preset which gives us a closer match to the Rec.709 standard, so calibration using the CMS is going to be a must for accuracy.
The CMS was surprisingly accurate and easy to use with good results available. Obviously our white point was not perfect, but it was pretty close out of the box. By correcting the colour points we have made the white point error slightly higher but still within our accepted bench mark errors. The only two areas where we struggled to get better results were Green and Blue which is a result of the native colour wheel not giving us just enough room to correct fully. However, these results with those two points are far better than the out of the box results and are still very close to being correct. I doubt any viewer would be able to pick out any obvious errors without a side by side with a reference display. The most important aspect, whenever calibrating the colour points, are the luminance results where we could get issues with clipping, but as you can see we hit almost perfection here. Overall, the CMS works well and the results with this sample rely, in a big part, to the better than average white balance preset. However, had that not been the case then using the CMS system perhaps would have been a moot point.
Starting with SD; the projector handled scaling and deinterlacing with aplomb with no signs of scaling errors of jaggies. The usual HQV tests were passed in good order with nothing that overly worried us. Even with tricky cadences the SP8604 managed to lock on and pass the vital 2:2 and 3:2 tests. With HD material in most cases this was fine and played back correctly, however, a slight bug that was similar to that seen on the Optoma popped up now and again. With motion smoothing switched off and playing 24p material there still appeared to be some motion compensation going on from time to time. This would correct itself in most cases by resetting the sync to the HDMI input. It looked like the SP8604 was playing back at 60Hz in some instances and then motion compensated in others. Thankfully this wasn’t a problem that appeared too often and was quickly sorted with a resync.
Talking about motion compensation frame interpolation, called motion smoothing on the SP8604, this works as you would expect with each upper level selection adding more smoothing. We found this added a large amount of unwanted image artefacts and was best switched off for movie watching. The only occasion we would see it being used would be with fast sports - and in the low setting.
Black performance and dynamic range are good when compared to other projectors in the SP8604’s class. We ran it side by side with the Panasonic PT-AE4000 and it was obvious that while the InFocus offers more lumen output, even in calibrated modes, it did suffer with shadow detail where blacks became solid areas of dark grey in reference viewing conditions. Black depth was slightly higher than the Panasonic as well, but when we added ambient lighting things went the opposite way thanks to those extra lumens in the SP8604. This is a projector best suited to a room with light coloured walls and the curtains closed, rather than all out bat cave conditions. Compared to the W1200 from BenQ, the InFocus was certainly better at handling black levels - by a smidge - and its lumens were again a factor in calibrated modes, however both models were quite similar in overall images terms which we found surprising.
Colour performance on the SP8604, in out of the box settings, leaves a lot to be desired if it is image accuracy you are going for. Colour is oversaturated with greens and reds the most obvious areas where things were just a tad off. However, calibration certainly helped with the colour gamut and the performance improvement was like night and day. Skin tones suddenly looked more natural and primary colours for the most part were natural and well behaved. It is a pity that we have to rely on the out of the box white balance results (in this case we got away with it) but this might not be the case with other samples.
- Nice design
- Fast remote control
- Good CMS system
- Good light output for use in normal living rooms
- Good video processing
- Good 24p playback
- No White balance controls for setting greyscale
- Cheaper projectors based on same software offer more control
- Frame interpolation adds artefacts with fast moving action
- While good, blacks are rather grey at the price point
- Lacking shadow detail at the lower extremes
- Dynamic range not the best at the price point
InFocus SP8604 DLP Projector Review
There is no doubt that DLP is now a well-established technology at both ends of the market and it is at this price level where the SP8604 and its ilk offer good value for money images. Those not to fussed with image accuracy and who like their images well saturated with colour will like what is on offer here, and those who like more accuracy will get good results here, but could do better elsewhere. So, it will come down to what exactly you want from your projector as to whether the SP8604 is for you to demo. On this occasion the lack of white balance controls to us is a sin that no display manufacturer should be committing in 2011 and as such the SP8604, along with the overall performance assessed, misses out on our recommended badge. That doesn’t mean it is a flop as we are sure there will be many who will like the images produced and the features on offer, but against our bench marks at the price point it just fails to hit top marks in a few areas. There is much to like here with the SP8604 and armed with what we have found here our readers should be well prepared for a demo.
Contrast/Dynamic Range/Black levels
2D Picture Quality
Ease Of Use
Value For Money
Our Review Ethos
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