No..you are correct in that the rainbow banding effect (I've since figured out that this is actually the jail bars that plague most model 1 units that produce these), are less or non-existent on the later model 1 units. But it really depends on what video encoder is found in the genesis models that determines how much of this can be seen or not.
I will warn you though, that all the model 1 units pretty much have crappy composite regardless and that is even when compared to composite from other consoles. Especially on modern HDTVs the composite from the Genesis is just the worst. That is what lead me to do my first AV mod was to mod my model 1 genesis so I could at least read the text on Shadowrun again and other RPGs.
So..granted I've not had personal experience with every single model in my hand. But most of the model 1's I have had and used at some point in time.
the va2 model 1 has the most dynamic sound, but it also has more distortion on the higher end freqs. Also has pretty noticeable rainbow banding whenever there is a scene using a solid color background.
the va3 model 1 in my opinion, has the best overall sound of any of them as it doesn't have the distortion of the va2, but it also doesn't quite have as much bass and overall as dynamic a sound. But most will never notice this. It too suffers from the rainbow banding.
the va5/6 model 1 have good sound, but it is lower in volume due to the added filtering. I find them to be the least dynamic of the model 1 units overall. The rainbow banding isn't as bad on these in most cases, but is still there if you look hard enough or have AV equipment that makes them more visible.
the va7 model 1...just pretend this thing doesn't exist. It is literally the offspring of model 2 and model 1 together. It sounds horrid audio wise, but oddly enough tends to have decent video quality overall.
Then you have your model 2s...and that is all well documented as well.
I personally prefer to have the va2 and better, the va3 model 1. I've only got 2 model 1 va3 units. One is a US Genesis I resurrected from the dead using some parts from a near minty va7 (told you I don't like the va7...). And the other is my favorite model...my JPN MD va3. It it just bliss in a sega shell. But I honestly don't actually game on that model much and keep it in a genesis rental case.
There are ways to reduce the rainbow banding, but it requires modding the console and you can't get rid of them if you use composite or s-video. On s-vid you can tell they are the jailbars making the rainbow like pattern since they show up more clear and as actual thin stripes of slightly lighter or darker color compared to the rest of the background. It is caused by a ton of noise on the color subcarrier used by the composite. It also effects the RGB lines and shows stripes then as well.
Anyway, there it is... I believe some people have managed to greatly reduce or eliminate the "rainbow/jailbars" but installing different encoders into their systems that seem to filter them better.
To be honest on a CRT the composite for the genesis looks pretty good and I'm not sure the rainbow banding issue was really noticed until HDTVs became more common. I certainly never knew about it until about 2005 or 2006 somewhere in there.
Edited by -^CrožBow^-, Thu Jul 26, 2018 8:54 AM.