World's best Tweeters Blind Testing

[Bill poster]

That number for the Via looks right. MY experience tells me you need foils about that thick to be reliable in a construction like the Via, however the .012 for the RAAL does not look right. It should be more like .004. where did you get the number for the RAAL?

Straight from their respective PDF spec sheets; I will have another look.
Edit, yes, 70-20XR 0.012mm. GRT145 0.009mm

 

[Jonasz]

Straight from their respective PDF spec sheets; I will have another look.
Edit, yes, 70-20XR 0.012mm. GRT145 0.009mm

Yes, it seems the 70-20 uses a ribbon three times as thick as the 140-15.

 

[lowmass]

Ok I found the 70-20 pdf

Looks like in an effort to get a low crossover point in a ribbon with 1/2 the vertical dimension of the 140-15 they made a version with thicker foil and a wider diaphragm. Im sure its a good ribbon but it will likley have a different sound than their other versions that use .004 foil.

 

[Bill poster]

Cant download the pdf image via tapatalk but its easy, just google it.

 

[Bill poster]

Maybe someone cd lend Ryan at Impulse Audio a pair of Raal's to compare. I'm digging his youtube channel, he's v professional but humble with it.