[Jon L]

With Neo 8 availability still unknown, I was wondering if Danny has looked at the newer AST (AMT) tweeters, specifically the Aurum Cantus AST25120 AST tweeter?  It has impressive sensitivity 98dB/w/m and ability to cross over low, 1kHz minimimum crossover point.

AurumAST25120 by drjlo2, on Flickr

I have been looking at tweeters that can be crossed over at or near 1kHz and noticed Jean Marie Reynaud speakers just launched the Voce Grande 2-way speaker using the Aurum Cantus AST tweeter crossed at 1.2kHz/12dB and supposed to sound wonderful. 
It seems to me this tweeter could easily cross at 1 kHz at 18dB or steeper slope, and I have read DIY reports this tweeter sounds even better as open baffle bipole by simply removing the felt on the back.  A GR Research kit would be very interesting maybe?

VoceGrande by drjlo2, on Flickr

[nickd]

Interesting driver indeed. I typically like speakers with crossovers in the 1250hz range. That’s If the drivers are comfortable there. The large ESS tweeter has also drawn my interest over the years. It operates OB and has a built in wave guide.

Be nice to hear Danny’s thoughts on the larger air motion drivers. I’m guessing they are a bit expensive for a line source and too compromising in dispersion to meet his standards in a traditional layout.

I’ve always liked the speed and transparency they offer.

[Danny Richie]

I have tested some of those and the version sold under the Dayton name.

They measured rough and not at all as published.

They are also way too tall to use as a single tweeter. The height causes a lot of vertical beaming and an uneven room response.

For a single tweeter look for shorter models.

[Jon L]

I have tested some of those and the version sold under the Dayton name.

They measured rough and not at all as published.

That's disappointing to hear. 
So basically it's Neo3 tweeters and cross higher to midrange/bass driver. 

For people looking to go with 2-way and cross tweeter as low as possible, 1-1.2kHz, how do you feel about the ESS Heil drivers?  I have noticed they have come down in price a lot from those who stock it. 

ESSamt1 by drjlo2, on Flickr

[Captainhemo]

The NX  line of speakers crosses right in the 1.3 khz  area.   I vbelieve  the  NQ Studio Monitor (small 2 way)  crosses right there  as  well..

jay

[sebrof]

There's also Beyma

https://www.beyma.com/en/products/c/amt-driver/1TPL15B8/twt-tpl-150-black-8-oh/

[morganc]

I think I have Beyma in my Spatial X-5's and they do sound great.  I so wish these were paired with servo subs like my old Super V's and would so love to hear / have a pair of Danny's new models. 

[Danny Richie]

We cross our Neo 3 nearly that low in some models.

And have you seen the frequency response on that ESS Heil driver? Un-usable.

That's disappointing to hear. 
So basically it's Neo3 tweeters and cross higher to midrange/bass driver. 

For people looking to go with 2-way and cross tweeter as low as possible, 1-1.2kHz, how do you feel about the ESS Heil drivers?  I have noticed they have come down in price a lot from those who stock it. 

ESSamt1 by drjlo2, on Flickr

[sebrof]

I think I have Beyma in my Spatial X-5's and they do sound great.  I so wish these were paired with servo subs like my old Super V's and would so love to hear / have a pair of Danny's new models.

I use the Beyma TPL150 in my DIY speakers and they sound pretty good. I had the Great Heil in the same speakers before I got the Beymas and I thought they sounded pretty good as well.

[Danny Richie]

That Beyma is a pretty nice tweeter. I got a real good response from it when I used it. Sensitivity is high too. I just wish it were shorter.

[Early B.]

That Beyma is a pretty nice tweeter. I got a real good response from it when I used it. Sensitivity is high too. I just wish it were shorter.

The Beyma is sweet, but it isn't cheap.

https://usspeaker.com/beyma%20tpl150-1.htm

[sebrof]

The Beyma is sweet, but it isn't cheap.

https://usspeaker.com/beyma%20tpl150-1.htm

They were $800 a piece when they first came out and a year or two after, I bought when they dropped to $800/pair. Looks like they dropped a little from that now.

[Wind Chaser]

Boy that looks like a really nice tweeter, too bad there isn't a simple DIY kit that incorporated the TPL-150 in a modestly size OB. 

[Early B.]

Boy that looks like a really nice tweeter, too bad there isn't a simple DIY kit that incorporated the TPL-150 in a modestly size OB. 

Not a kit, but I have a pair of OB monitors that Danny designed with the Beyma tweeter and a Beyma 8" midrange. 

[Wind Chaser]

Is that the one and only pair via Hawthorne Audio? If I’m not mistaken those are a desktop OB? How long have you had those now? Ready to move on to something else? .  Need a buyer? 

[Jonathon Janusz]

Although clearly not as fancy as the formed stone horns/waveguides on the original, I wonder now that Hawthorne Audio is long gone if Danny and Jay could create/release a kit of those Beyma AMT/Woofer speakers if there was interest from folks for them?  Unless it is ridiculously thick, I'd imagine the baffles could be machined from MDF for these similar to how the NX-models are done with the Neo3 waveguides?

[Rocket_Ronny]

I just wish it were shorter.

What if a lens was used with a shorter opening. It would load the driver some but improve vertical dispersion, no?

Rocket Ronny

[Early B.]

Is that the one and only pair via Hawthorne Audio? If I’m not mistaken those are a desktop OB? How long have you had those now? Ready to move on to something else? .  Need a buyer? 

Desktop OB? How about a dinner table OB? I've had them almost 5 years. Even if I wanted to, my wife wouldn't let me sell them.   

[Early B.]

Although clearly not as fancy as the formed stone horns/waveguides on the original, I wonder now that Hawthorne Audio is long gone if Danny and Jay could create/release a kit of those Beyma AMT/Woofer speakers if there was interest from folks for them?  Unless it is ridiculously thick, I'd imagine the baffles could be machined from MDF for these similar to how the NX-models are done with the Neo3 waveguides?

Danny won't touch them for the reason he mentioned. However, send him the drivers so he can design an OB speaker for you.

BTW - Beyma has a horn version of this driver, so there's no need to fashion a waveguide:  https://usspeaker.com/beyma%20tpl150h-1.htm

[Rocket_Ronny]

I know about the Beyma wave guide. Point was to have a shorter output to minimize reduced vertical beaming.

Rocket Ronny