Boba U4T vs Gazzew Boba Gum: Quietest Switch for Video Calls
If you’re stuck in back-to-back video calls but still want to type on a mechanical keyboard without your coworkers hearing every keystroke, Boba U4T and Gazzew Boba Gum are the two switches that keep coming up in every thread about this. Both are budget-friendly, pre-lubed, dampened linear switches built around the same “thock” philosophy. But they’re not identical twins, and the differences matter a lot the moment a Zoom call goes live. Short version: the original Gazzew Boba U4 (and its successor U4T) is the gold standard for deep, muted thock with almost no spring ping. Boba Gum, on the other hand, is softer, mushier, and even quieter, but you give up some tactile feedback and bottom-out feel to get there.
What Makes a Switch “Call-Safe” in the First Place
Three factors decide whether a switch will get picked up by your microphone:
- Bottom-out sound - the loudest part of any keystroke, caused by the stem slamming into the switch housing.
- Spring noise - a high-pitched ping or scratch from the spring compressing. This cuts through mic pickup way more than a dull thock ever will.
- Actuation force and travel - lighter, shorter-travel switches mean you naturally hit the keys less hard.
Both switches target all three, just with different engineering choices under the hood.
Boba U4T: The Refined Original
The U4T is Gazzew’s updated take on the cult-favorite U4 switch. It uses a long-pole design with internal dampening (not just a foam pad slapped on top), and that’s a bigger deal than it sounds:
- A deep, rounded “thock” with almost zero spring ping right out of the box.
- Smooth, factory-lubed stem, so there’s barely any scratch to begin with.
- Linear feel with light-to-medium actuation force (around 45g), so you’re not pounding the keys to register a press.
- Sound stays low-pitched and muffled, the kind of noise that just blends into room ambiance instead of spiking on a mic.
In side-by-side mic recordings, U4T consistently comes across as a soft “thump” rather than a “click” or “clack.” That’s exactly what you want when your camera and mic are both live and someone’s mid-sentence in a meeting.
Gazzew Boba Gum: Softer, Quieter, Mushier
Boba Gum takes the same dampening concept but swaps in a gummy, softer material at the stem and housing interface. Here’s what that buys you:
- Even lower volume than U4T, noticeably quieter during fast typing bursts (think rapid note-taking during a call).
- A mushy, marshmallow-like bottom-out feel. Some typists genuinely love this; others find it a bit too soft, almost like typing on a sponge.
- Slightly reduced tactile feedback, which can hurt accuracy for people who type heavy and fast.
- Great for long calls where you’re jotting notes nonstop and want zero percussive click, full stop.
If absolute silence matters more to you than how the keyboard feels under your fingers, Boba Gum edges out U4T. Not by a mile, but the gap is real.
Side-by-Side Comparison
| Feature | Boba U4T | Gazzew Boba Gum |
|---|---|---|
| Sound profile | Deep thock, slight thump | Muted, soft, almost silent |
| Feel | Smooth, slightly firmer | Mushy, marshmallow-like |
| Actuation force | ~45g | ~45-50g |
| Spring ping | Virtually none | Virtually none |
| Best for | Thock lovers who still want feedback | Maximum quiet, minimal feedback |
| Price range | Mid-budget | Mid-budget |
Which One Should You Actually Buy?
- Choose Boba U4T if you want that classic satisfying thock for your own enjoyment while still keeping the call volume down. It’s the better all-rounder: good typing feel plus quiet performance when it counts.
- Choose Gazzew Boba Gum if being completely silent on calls is non-negotiable, even if it means giving up some tactile snap and precision.
Either way, a few extra tweaks will squeeze even more quiet out of your build:
- Add switch films to cut down on housing wobble (a surprisingly loud, often overlooked source of rattle).
- Use a foam-dampened or gasket-mount keyboard case to soak up extra vibration.
- Lube your stabilizers separately. Unbalanced stabs are, more often than not, louder than the switches themselves.
- Keep a software noise gate (Krisp, or whatever your call app has built in) running as a backup layer, just in case.
Conclusion
Both Boba U4T and Gazzew Boba Gum are chasing the same goal: typing quietly during video calls without losing your mind on a membrane keyboard. They just get there from different directions. U4T hands you a satisfying, muted thock without sacrificing much feel. Boba Gum trades a bit of that feel away in exchange for the lowest possible volume. For most people who want a mechanical keyboard they actually enjoy using and can get away with on calls, U4T is the safer bet. If silence is the one thing you won’t compromise on, grab the Boba Gum instead.