Interestingly, we often let the visual impact the aural. Conventional wisdom emerges.
In my experience for example, tubes look warm, are warm yet do not necessarily sound warm (or warmer).
Tweeter materials don’t necessarily sound a certain way. metal domes are shiny looking but don’t sound “bright.” A speaker’s sound is dependent on far more than tweeter or woofer cone materials. I have some experience with Revel (Voecks designs going back to Snell) and never found them “bright”…I never found my CJ preamps (with Krell SS amps) to be “warm”….
This is worth perusing
Finally, the made in China issue.
I just found out Dynaudio speakers (at least some) are “Made in China.” Some Revel’s are “assembled” in Indonesia (not sure about China). There is a difference between design, engineering, parts manufacture and assembly etc. Regardless, quality control is critical…here, there, or wherever.