I have decided the monoprice is no good for HD (720p, 1080i). It's probably fine for SD (480i/480p). I performed two separate tests that led me to this conclusion.
1) I setup a test where I feed an alternating on/off dot pattern using 720p. I found this available here
. Without the monoprice switcher, you could clearly see the individual dots. I then added the monoprice switcher and the image became almost gray. Clearly it doesn't have the bandwidth to properly do HD. This is consistent with my previous concern, posted above, where I stated the datasheet for the chip used in the switcher was at -3db at 30Mhz).
2) I did the stress test where you feed the output back into the input. Specifically, using only the Y/G source connector
Source Y/G goes to Monoprice Y/G IN
Monoprice Y/G OUT goes to Monoprice Cb IN
Monoprice Cb OUT goes to Monoprice Cr IN
Monoprice Cr OUT goes to display device
This causes the Y signal to go through the switch 3 times. With this test, no image would display at all! I adjusted the setup so that the signal only went through 2 times. With this you could see an image --- but only if the image was dark. For some reason the brighter signal didn't work at all.
Originally Posted by Rick0725
Do you really expect to see a sizable difference on the monoprice $30 switcher vs a $300+ one?
Save the money and put it towards another gadget ...like an hd dvd.
I agree good component switchers are insanely priced. That is why i tried out this one. Having said that, you will lose about 1/2 of your HD horizontal resolution with the monoprice. I'm certainly interested if others run these same tests and see same/different results.