Bliesma T34B-4 on Waveguide No.2439

[@proffessasvids]

Lovely stuff there Joseph! Xx

[@JosephCrowesDIYSpeakerBuilding]

Thank you!

[@AudioGeorge]

I expected lower fs for a 34mm hard dome. So I will wait for the purify tweeter test.Great job Joseph!

[@JosephCrowesDIYSpeakerBuilding]

Yes, I would love to see actual polar data on what Purifi comes up with. It’s certainly a tough technical challenge. Purifi needs to make a compression driver!

[@INeedsMoneys]

@@JosephCrowesDIYSpeakerBuildingis Purifi making a tweeter? What!? 😮

[@SachinGupta-mb3pz]

Hi Joseph, thanks for your review. Great as always. I have been searching for one of the best compact size tweeter for my car. I have teied morel piccolo, sb acoustics beryllium 29 drc and some other tweeters but still looking for more cleaner tweeter. Can you plz help to look for what can be better here. Thanks alot for your videos.

[@MrBonger88]

Interesting. That Be driver looks good. Have you tested the Truextent Be diaphragms on your horns? I’d like to know how they compare to the Be dome tweeter

[@JosephCrowesDIYSpeakerBuilding]

Yes, here… josephcrowe.com/blogs/news/18sound-nd1480be-beryllium-1-40-compression-driver-test-review

[@johanneswolff9554]

please test the 5530ND

[@JosephCrowesDIYSpeakerBuilding]

Did you see it was tested here? audioxpress.com/article/test-bench-the-bms-1-5530nd-high-efficiency-compression-driver

[@cncspeakers1664]

Nice compairson of the Beryllium and Ceramic. It does re enforce my experance that most Ceramics I have tried sound harsh. I have only used cheep ones so perhaps this one is better. I have been looking for a cheep Beryllium and their has been on ebay for a few years that is 16% Beryllium and the rest Copper. No reviews anywhere. Its under the name davidlous and they have a 25mm unit. It does look like the primary breakup is about 14K which would make it about the same as a ceramic. Perhaps the damping is a lot better. Love your work BTW.

[@JosephCrowesDIYSpeakerBuilding]

I haven’t really noticed ceramic being worse than neodymium. I’ve tested the 65CD-T vs 65CDN-T and no difference. I’ve tested the RCF CD350 vs ND350 and no difference. These models are the same other than the magnet material. But I’ve experienced massive differences from model to model even under the same brand…from terrible to excellent, depending on model. So it’s all about a particular design implementation for that specific driver model, regardless of brand or cost.

[@phillipmorris9847]

where can I get a pair of those Bliesma T34B?

[@JosephCrowesDIYSpeakerBuilding]

It looks like Solen here in Canada. I’m not sure where in the USA.