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I have a GX Blue keyboard from Logitech, which is very clicky and loud. After applying these O-rings to my keyboard, I could hardly perceive any difference in loudness (see video).
However, the difference in key travel distance is very noticeable. I initially only applied the rings to half the keyboard, and I could immediately notice that the keys have reduced travel distance. This made typing a bit more tiring for me.
In static physics, Newton's third law tells us that for every action, there is an equal and opposite reaction. When your finger pushes the key to the bottom, the key starts "pushing back" against your finger with equal and opposite force. When your finger has to constantly deal with this force, it gets tired more quickly - this is what I think is happening anyway.
All in all, I would not recommend this product, at least if your keyboard is the MX or GX blue variant.
On my Gateron Optical Brown switches, comparing a switch with them on vs. one without them made no difference. The product does say they are for Cherry MX key switches, but most switches have the same travel and dimensions of Cherry MX key switches, so I don't see it working better on a different keyboard.
3 stars because they are decent quality and there might be some switches with shorter travel that will find them useful.
For what it is it shouldn't cost more than $3. Guess it's the price for fast and reliable shipping. But it works well for my purposes as my keyboard makes a brutal 'clack' with the keycaps and I press pretty hard.
Ok I'll start by saying that these rings will not remove the ckicky noise from blue switches. I have the Hyper x alloy elite RGB MX blue and by far mx have the higher nosie ratio compared to that of the Logitech GX blue.
These changes the feeling of the keys when bring pressed. So it is up to you if the reduction of noise of the keys when hitting the based is worth the trade.
Keyboard used: Razer Black Widow Chroma Switch types Kalhi Greens
Used 1 Oring. Little to no sound damping. Key travel seemed the same also.
Used 2 Orings. Again, no effect on sound that I can perceive. At this point, I noted the key is now lightly taller than the keys next to it without Orings. Yet no distinguishable reduction in key travel distance.
I was able to slap a total of FOUR rings to my wsad keys. The added a significant elevation to the height of the Keycaps.
At this point a stated to sorta note a reduced in key travel. The noise remained the same.
In conclusion, I feel they haven't really accomplished my original goal of sound reduction, but a side effect is that I now can have some keys raised above others.
I found this to be the only noticable and impacting change.
I would not recommend this product for sound reduction. A quieter keyboard is the only real solution.
I use a blue switch keyboard and these things hardly do jack s**t, I'll be honest. They dampen the noise MAYBE by like 15%. But who knows maybe my roommate really does appreciate that 15% reduction at 4am.
I even double ringed every one of my switches and that's the only thing that even made it somewhat quieter.... Yeah... Not exactly a "must buy" imo.
Kinda mushy for o rings, but do get the job done. I would remind these for people who have backlit key caps. Kust for my taate they are softer then what i would like but not too bad where it feels like a remote control. If you can get them cheap it's worth a buy.