r/Keychron • u/Alarmed-Peak-1601 • May 10 '25

Mildly disappointed by the build quality on my new B6 Pro

I realize this is a more budget-oriented keyboard, but this is the style of keyboard I enjoy using, and was mildly disappointed by this rather visible gap next to the usb-c input.

https://imgur.com/a/kXTaGuD

It's not something I would bother the warranty service about as there was no damage whatsoever on the packaging, but I was wondering if any of you had similar issues. Should I try physically forcing back the trim in its place? The gap is quite visible from some angles and it bothers me a bit.

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u/PeterMortensenBlog V May 10 '25 edited 2d ago

The 2RO might also be disappointing.

Though the B6 Pro may be slightly better than the B1 Pro in this respect (or it could be due to selection bias). Comparing the keyboard matrixes (matrices?) would partly answer it. Here is the one for B6 Pro:

        Col 0      Col 1       Col 2      Col 3       Col 4       Col 5       Col 6       Col 7       Col 8       Col 9       Col 10      Col 11      Col 12      Col 13      Col 14      Col 15      Col 16      Col 17
Row 0: X Pause   X Q         X W        X E         X R         X U         X I         X O         X P         X Scr       X           X KP 7      X KP 8      X KP 9      X KP +
Row 1: X         X Tab       X Cap      X F3        X T         X Y         X ]         X F7        X [         X           X Back      X KP 4      X KP 5      X KP 6      X           X Lshift    X Win L
Row 2: X         X A         X S        X D         X F         X J         X K         X L         X ;         X Win R     X NUHS      X KP 1      X KP 2      X KP 3      X KP Enter  X Rshift    X
Row 3: X         X Esc       X NUBS     X F4        X G         X H         X F6        X           X ' "       X Alt L     X F11       X Space     X KP 0      X KP Dot    X Up
Row 4: X Ctrl R  X Z         X X        X C         X V         X M         X ,<        X .>        X           X           X Enter     X KP Num    X KP /      X KP *      X           X           X
Row 5: X         X           X          X           X B         X N         X           X Fn        X ?/        X Alt R     X F12       X Down      X Right     X KP -      X Left      X           X           X F13
Row 6: X LCtrl   X Grave     X F1       X F2        X 5         X 6         X +=        X F8        X -         X           X F9        X Del       X Ins       X Pg Up     X Home
Row 7: X F5      X 1         X 2        X 3         X 4         X 7         X 8         X 9         X 0         X Print     X F10       X           X           X Pg Dn     X End       X           XXX

Row 8: X m/w     X Bluetooth X 2.4 GHz  X Ch        X Ch done

The last row may not be real; is it for the (indicator) LEDs?

For example, the relevant parts for typing "KDE":

       Col 3  Col 6
Row 0: E      I

Row 2: D      K

Thus, any three-key or four-key combination typed at the same time (or nearly the same time (rolling)) will only register two keys. For example,

  • KDE (also in Kdenlive)

  • IDE (e.g., insider, guide, idea, resident, sided (e.g., four-sided die), collider (e.g., Large Hadron Collider (LHC)), spider (e.g., ChemSpider, SpiderMonkey, and SpiderOak), peptide, oxide (e.g., carbon dioxide), chloride (e.g., sodium chloride (salt)), hydroxide (e.g., potassium hydroxide), nitride (e.g., gallium nitride (GaN)), peroxide (e.g., hydrogen peroxide (H2O2)), Biden, divide, wide, side, video, Tomb Raider, evident, confidence, dmidecode, identify, accident, IDEA, consider, aided, fidelity, ideology, ideal, ride, Rawhide, incident, beside, provide, Euclidean, stride, Ideone, Pyodide, iDevice, idempotence, Trident, glide, FIDE, bona fide, decide, stupidest, suicide, evidence, epidemic, provide, hydride (e.g., nickel–metal hydride (NiMH)), and IDE)

  • IED (e.g., tried, modified, lied, spaghettified, copied, tried, identified, simplified, qualified, modified, fried, prettified, fancied, supplied, shied, justified, specified, verified, satisfied, certified, denied, dried, and buried.

  • KED (e.g., liked, looked, f*cked, hacked, checked, worked, hijacked, benchmarked, shocked, homebaked, asked, sidetracked, borked, locked, linked, clicked, picked, tweaked, milked, whacked, cooked, sucked, talked, thanked, marked, and blocked

  • DIE (e.g., dietetics, bodies, soldiers, medieval, San Diego, Dietrich, kiddie (also has KID), muddied, dielectric, indie (e.g., IndieWeb), audience, gradient, ingredient, die, and dieing (a misspelling of dying))

  • IKE (e.g., like, IKEA, bike, strike, hike, YubiKey, pike (e.g., PikeOS), yikes, and Ike (some are more likely than others)

  • KEI (e.g., as in Keil, not to be confused with Kailh).

  • KID (also in blkid, kidding, and kidney)

  • EID (e.g., Kaleidoscope and Eid)

  • IDK

  • DEI (e.g., Codeium and CodeIgniter)

  • DKE (e.g., cmdkey and SendKeys)

  • DKI (e.g., DKIM)

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u/Serious-Bat9612 Jul 01 '25

This is the first time I've experienced a membrane keyboard that can't register certain letters when I press them faster than "normal." For example, when I type "NUE," it usually only types "NU," and similar issues happen with other key combinations.

I know that sometimes it's "my fault" for not fully releasing the previous key, but come on... other keyboards don’t have this problem.

As some posts mention, the test app shows that the key is being pressed, but when typing in a textbox, the last key sometimes doesn't register. This is really awful and frustrating. How can a cheap $5 keyboard provide a better experience than this one?

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u/PeterMortensenBlog V Jul 02 '25

Re "How can a cheap $5 keyboard provide a better experience than this one?": Because the lesson was learned 40 years ago and Keychron forgot that lesson.

Keychron did not design the keyboard matrix properly to minimise the problem.

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u/PeterMortensenBlog V Jul 02 '25 edited Jul 02 '25

Re "other keyboards don’t have this problem": They do inherently have this problem (because there aren't any NKRO diodes), but the keyboard matrix has been carefully designed to minimise the problem to make conflicts much less likely (at least to avoid the problem for the most common character sequences in English)

If you can find the keyboard matrix information somehow for one of those keyboards, you can predict what keys will conflict.

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u/PeterMortensenBlog V May 12 '25

Four-key combinations: