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Start with Gazzew Boba U4 silent tactile switches if reducing typing noise is your priority. Consider U4T if you want audible feedback alongside tactile feedback—the bump felt during a keypress. That recommendation follows Thock King’s descriptions of its U4 V2 as sound-dampened and silent and its Black U4T RGB V2 as thocky tactile, the merchant’s subjective sound description.
Bottom-out means reaching the end of the downward stroke. The tactile bump and the way the press ends are separate sensations to evaluate, as the historical U4 review discusses.
For someone choosing switches for a shared workspace or a personal keyboard, the next question is which exact version and spring option to try. Both Thock King listings describe vendor-serviced switches, so their descriptions should guide comparisons of those offerings.
Editorial method: This research-based comparison uses vendor excerpts and historical review and community text captured October 15, 2026. No hands-on testing or sound measurements were performed for this article.
Quick take
- Noise sensitivity: Begin by sampling the described U4 damped option.
- Audible feedback: Begin by sampling the described U4T option.
- Uncertain about feel: Compare exact revisions and spring labels before committing to a full keyboard.
On this page: Comparison table · Feel and damping · Spring choices · Sample worksheet · Ordering checks · FAQ
U4 vs U4T at a glance
The table compares two specific Thock King offerings. Its sound descriptions and spring options remain tied to those named listings.
| Decision point | Gazzew Boba U4 V2 | Gazzew Boba Black U4T RGB V2 |
|---|---|---|
| Vendor’s description | Silent tactile with a sound-dampened stem | Thocky tactile |
| Listed spring labels | 62g, 63.5g long spring, 68g | 62g, 63.5g long spring, 68g |
| Sale condition | Assembled with hand-lube and/or film service; stock/non-lubed switches excluded | Assembled with hand-lube and/or film service; stock/non-lubed switches excluded |
| Preference to investigate | Tactile feedback with noise reduction as the priority | Tactile feedback with audible character as part of the appeal |
| Main sampling question | Do you enjoy the damped bottom-out? | Do you enjoy the audible feedback in your intended setting? |
Sources: Thock King’s U4 V2 listing and Black U4T RGB V2 listing, captured October 15, 2026.
These descriptions support a useful preference comparison. They do not establish a measured noise difference or identical tactile feel between the two offerings. Confirm the selected lube and film service when comparing samples or orders.
Gazzew Boba U4 silent tactile switches: who should try them?
The U4 is the sensible starting point when your main requirement is damped typing feedback. Thock King specifically attributes its U4 V2’s silent role to a sound-dampened stem. That makes the named offering relevant to someone who wants tactile feedback while prioritizing the people nearby. Source: Thock King
A useful U4 sample session asks whether you like both the bump and the way the press ends, rather than judging the switch solely by its silent label. For a shared room, make acceptable noise the first decision. Once a sample meets that requirement, judge whether its feel is something you would enjoy across your keyboard.
Gazzew Boba U4T tactile switches: who should try them?
U4T is the candidate to investigate when sound is part of the typing experience you want. Thock King describes its Black U4T RGB V2 offering as thocky tactile. Treat “thocky” as the merchant’s sound description; it supplies no calibrated pitch or loudness target. Source: Thock King
Consider this option when you have room for audible typing and want to evaluate that character alongside feel. If noise sensitivity is your deciding constraint, keep the U4 damped option at the front of your sample comparison.
How damping affects the bottom-out decision
A January 16, 2021, KeebTalk comparison by Deadeye offers a historical explanation of the different bottom-out approaches. In the switches examined, the U4 bottomed out on soft bumper pads. The U4T bottomed out on a longer center post and lacked those silicone bumpers.
That observation helps explain why comparing the models involves more than listening. The end of the press is another preference to assess. During sampling, ask whether you enjoy the U4’s damped stopping sensation and whether the U4T’s stopping sensation suits your typing style. The 2021 observations describe those particular switches; they do not confirm every detail of the current listings above.
The same discussion warns against assuming that removing U4 bumpers creates a U4T. Deadeye reported abnormal travel behavior and concerns about the unsupported bumper rails. Choose the intended switch model rather than treating bumper removal as a substitute. Source: KeebTalk
How much weight should you give older reviews?
ThereminGoat’s U4 review, written by Benjamin Rudzinski, explicitly separates its early samples from the July 2020 pre-production release. The reviewed samples had a different bottom housing material and no-slot tops, while the release discussed used slotted tops. The review also discloses the author’s friendship with Gazzew and sample supply; its scorecard was revised on August 1, 2021.
Use that review for attributed historical impressions and context. Keep its sample observations separate from specifications or promises for a newly selected U4 revision.
Spring options: what the labels tell you
Thock King’s named U4 V2 and Black U4T RGB V2 descriptions both list 62g, 63.5g, and 68g options, with 63.5g identified as a long spring. These are listing labels for those offerings. The captured descriptions do not establish actuation force or matching force curves between models. U4 source · U4T source
Use those labels to organize a sample comparison:
- Comparing models: If possible, select the same nominal spring label and vendor service condition for each.
- Comparing spring options: Keep the model, revision, and service condition consistent.
- Considering 63.5g long springs: Evaluate that option directly instead of assuming its feel falls neatly between the other labels.
A matching number is a useful ordering reference, but it does not prove equivalent resistance throughout a keypress. Ask the seller what its spring value represents if that distinction matters to your choice. Judge comfort from the sample you intend to order.
A practical sample comparison worksheet
Before buying a full set, ask whether a small quantity of the exact options is available. Confirm that samples match the revision and lube or film condition intended for the larger order.
If your keyboard’s documentation permits user switch replacement, compare samples in that keyboard. Otherwise, use a suitable tester for an initial feel comparison and leave whole-keyboard sound judgment open.
Keep the comparison conditions consistent
Record the keyboard, case, plate, keycaps, switch position, room, and typing style used for each comparison. Keep those conditions consistent where possible. Evaluate ordinary typing as well as deliberate individual presses.
The historical KeebTalk sound discussion illustrates why context matters: its author used a small tester held against an overturned keyboard case and described changes in perceived depth with the case and striking force. That clip compared U4T with another switch, so it supplies no controlled U4-versus-U4T noise measurement. Source: KeebTalk
Use this worksheet to reach a decision without assigning an artificial score:
| Record or evaluate | Question to answer |
|---|---|
| Exact sample identity | What are the full model name, revision, housing label, and spring label? |
| Service condition | Is it factory-stock or vendor-serviced, and what lube or film service was selected? |
| Tactile feedback | Do you enjoy the bump during normal typing? |
| Bottom-out | Does the end of the press feel comfortable and satisfying? |
| Noise acceptance | Is the sound acceptable in the room where you will use it? |
| Purchase match | Can the larger order match the sample’s exact configuration? |
For example, someone sharing a home office could start with U4 samples, check whether the sound is acceptable to the other person, and then choose among spring options by feel. Someone with a separate typing space could start with U4T samples and decide whether its audible character remains enjoyable during ordinary work. These are suggested decision paths, not reported test results.
Before ordering: check fit, quantity, and seller claims
Confirm compatibility with your exact keyboard
Thock King’s U4 V2 specification text labels that offering as MX base and PCB mount with a 5-pin housing. Those are vendor-attributed descriptions of that listing. Source: Thock King
Check your keyboard’s documentation for its switch technology, socket type, supported pin layout, mounting requirements, and keycap requirements. Match the exact selected U4 or U4T offering against those requirements before ordering. An MX-style or RGB label alone does not establish compatibility with an unspecified keyboard.
Check revision and housing labels
Copy the complete product name and selected variant into your order notes. Record whether the housing is described as opaque or clear, along with any revision label. Avoid inferring a housing material or shared internal design from its appearance.
For a concrete example, the captured Ringer Keys U4T listing mentions full-clear U4T RGB v3. Keep that identity separate from Thock King’s Black U4T RGB V2 example above.
Check the unit count before comparing totals
Ringer Keys explicitly states that quantity 1 means one single switch on its U4T listing. That rule belongs to that merchant’s listing; it does not establish a universal pack size. Source: Ringer Keys
Count the switch positions you intend to populate, decide whether you want spares, and verify what each cart unit contains. Check sample quantities separately from full-set quantities. Compare checkout totals only after confirming that both orders contain the intended number of switches and service selections.
Verify authorization independently
Ringer Keys describes itself as an official vendor, while Thock King describes authorization for lube and filming services. Those are merchant statements. Seek current corroboration from Gazzew or maker-confirmed seller information before treating a shop’s authorization as independently verified. Ringer Keys statement · Thock King statement
Before payment, check the selected revision, service condition, quantity, current price, stock, and return terms. The links here identify source listings and carry no affiliate tracking.
Frequently asked questions
Does “silent” mean the U4 will make my keyboard inaudible?
No whole-keyboard silence guarantee follows from the available evidence. Thock King describes its U4 V2 as silent and sound-dampened, but supplies no calibrated U4-versus-U4T noise reduction here. Use that description to choose a candidate, then evaluate an exact sample in the setting that matters to you. Source
Will a 62g U4 feel the same as a 62g U4T?
Matching 62g labels do not establish matching force curves or bottom-out sensations. The named listings provide spring options, while the historical community comparison describes different bottom-out structures. Compare exact samples with matching nominal labels and service conditions to decide whether either feel suits you. Listing · Historical comparison
Can removing U4 dampers turn it into a U4T?
The January 2021 community comparison advises against that assumption. Deadeye described a longer U4T center post and reported that removing U4 bumpers left unintended travel behavior and unsupported rails. Select the intended U4T model if that is the option you want to evaluate. Source
Which should you choose?
Choose Gazzew Boba U4 silent tactile switches as your starting point when noise sensitivity leads the decision. Consider U4T when audible tactile typing is part of the appeal. Your next step is to identify a compatible exact revision and service condition, then sample the spring options before ordering a full set.
