I unintentionally neglected to point out that I do realize this topic is about "ribbon tweeters" and my response is geared towards "high velocity folded ribbon tweeters". The following is an excerpt of GoldenEar literature about the HVFR tweeter:
"Our extraordinary HVFR tweeter, which generates highpressure
by squeezing the air, rather than pushing and pulling
it like conventional domes or ribbons, achieves an exceptional
impedance match to the air for smooth response extending
beyond 35kHz, without the break-up modes and zingy sounding
distortion common to other tweeter types. Greater control
also results in improved dynamic range."
"Our extraordinary HVFR tweeter, which generates highpressure
by squeezing the air, rather than pushing and pulling
it like conventional domes or ribbons, achieves an exceptional
impedance match to the air for smooth response extending
beyond 35kHz, without the break-up modes and zingy sounding
distortion common to other tweeter types. Greater control
also results in improved dynamic range."