Prices on everything have become much higher than they used to be so it is hard to criticize manufacturers for raising prices. But it does change the value proposition. Most of the drivers I have sitting in my cupboards I would be thinking twice about buying at the current prices.
The construction of the driver matches up well with the sound descriptions above. A big fat surround is going to produce more low order distortion and is going to contribute to the sound character as more of the radiating area is from a softer less pistonic material. The very flat and wide dome makes the directivity really narrow up at high frequencies. There is also the dished faceplate which adds to the same sort of tendency.
If you have experience of and like ring radiator tweeters then you would probably like the SB tweeters as they will have some of the same traits. If you don't then maybe you won't 🙂 But unless you have the opportunity to compare in the same design I'm sure any of them will make you happy.
Yes I did read of the issues you had, I am always concerned that something similar will happen to me shipping drivers to Australia. My experience was very positive as my drivers arrived without any issue. The packing was minimal but the Bliesma manufacturer packing is good to start with. TLHP are the masters of extra packing, they always add air bags or foam pellets inside an external box.
Soundimports have always been good to buy from too, but they seem to have had a difficult relationship with Bliesma and no longer offer them so apart from Solen there isn't anyone else obvious to suggest to buy them from other than direct from Bliesma.
The prices sure have shot up for all the Bliesma stuff, not just their Be drivers. I almost prefer the M74A over the Be version, but its no longer as affordable either.
Looking at other Be tweeters, they seem to differ quite a bit in character from brand to brand. The little plastic SB26 compact Be tweeter looks interesting. Its hard to justify over $300 a piece for plastic neo driver.
Looking at other Be tweeters, they seem to differ quite a bit in character from brand to brand. The little plastic SB26 compact Be tweeter looks interesting. Its hard to justify over $300 a piece for plastic neo driver.
I don't think many people has had the opportunity to compare different beryllium tweeters like you have so it's very interesting to hear your opinions about them.
I'm soon to finish a project with scan speaks D3004/664 but I'm already looking for my next build.
Do you have any experience with scan speaks beryllium tweeters and care to give your thoughts on them compared to bliesma and satori? It would be much appreciated.
I also have a pair of seas T29B001 but haven't had a chance to listen to it yet.
I built speakers with D3004/664000, D3004/604010 and T25B but had not the chance to 1:1 compare the tweeters as I did with the Bliesmas.
All of them have a lot of resolution but without the "intrusivness" of normal metal tweeters. For my use (monitoring) the perfect balance, easy for long term listening but still a ot of resolution. I heared a similar signature in these 3 (relaxed but detailed, more "real" as other metal or soft dome tweeters) but prefer the bliesma, for me the technical superior driver.
The wide surround tweeters all have significant beaming in the top octave and often higer H2 - it's a "transition" to a real ring radiator. I had a quite nice speaker with ring radiator for some time as main speaker and while i like the sound of the RR a lot the beaming made problems. When frequency response was good when listened closely it was dull in the room and when it was good in the room it was to harsh close up. T25B (and even more A) is way more balanced here.
I'm afraid you confuse me with someone else? My site is really bad ... 😀
I never heared T34B and once did an active crossover for T34A in my rooms. T34A has incredible off axis performance, it's an unreal feeling caus it doesn't met the expectations you have to such a big dome at all. Pretty cool 😎. But T25B sounds better when you don't need the low cross over frequency or SPL.
T34B would be very interesting to compare - I would ESTIMATE it donesn't sound as nice as T25B but better as T34A and will be phenomenal at high SPL levels cause you can't reach these with normal tweeters and have superiour behaviour as horns + compression drivers. But that's pure guessing.
Nah I like it... again measurements and awsome work on the cabinets and front baffles. I liked a lot Goran (Audioexcite) too or simplicity of Zaph's or Troels Gravsen. That's ok it is not Louis Vuitton stuffs orJMLAB market either.
Thanks for the feedback again.
Edit : I appologize I mixed yours with @PKAudio one's....
Thanks for the feedback again.
Edit : I appologize I mixed yours with @PKAudio one's....
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A small 104mm waveguide for the BlieSMa T25B-6, T25D-6, T25-S-6 tweeters:
https://hificompass.com/ru/projects...25-dlya-tviterov-bliesma-t25b-6-t25d-6-t25s-6
English version coming soon...
https://hificompass.com/ru/projects...25-dlya-tviterov-bliesma-t25b-6-t25d-6-t25s-6
English version coming soon...
Same WG for all of them ? Questionning another way: are WG mostly important for the tweeter low end ?
Maybe you didn't read the article but the answer to both questions is no.
One thing that can be helpful in showing how even the directivity of the waveguide is to normalize to 10 or 15 degrees off axis as a comparison. 0 degrees is almost always the outlier. The graphs will look even better and show what a good job you did 🙂
Thank you, I know of that and you know of that, but the majority don't know and used to see normalizing to on-axis response 🙂
Very true, no one used to care about the off axis response either but times have changed, I think showing both is worthwhile, slowly the unfamiliar can become familiar.
It is indeed not straigth forward to look at the raws measurement of a tweeter in its WG then imaginate it with its low pass filter that smooths this V shape... As well one can be intimadated by the bigger post 20 k hz band peak.
For the low averaged people like I with passive filter, WG designers should show an illlustration of the low pass with at lleast a 12 dB slope imho... story to motivate the new candidates...
just my 2 cents.
@fluid : definitly not for me those 25B because of price. I didn't trigerred when they poped up at 200 with VAT in UE. Now they are with VAT at 330 euros... This is much more than life inflation; it is not just 5% or 7% to compensate increasing of enterprises charges since covid. No they just took the train of I increase a non rational way my margins... so without me, not in my name if you prefer ! That's ok if some can affoard. Makes me thing of that increase with copper foil capacitors, they were not costing the price of gold at the beginning, then after few papers from guys living in North Europe where they are made for the most, prices poped up.
I will try the SB26 CAC in a WG...
Sorry for the off topic, continue the good work please and thanks for that.
hi
will there also be WG for aluminium version of T25 in near future? i'm unable to force myself to buy BE version at current prices.
was lucky enough to buy T34BE version two years ago ... that costed the same as T25now ;(