That is often more an advantage but that depends pretty much on what kind of listening situation you got. If you want the AMT to be crossed over that low, chances are you got something bigger below it and if you got big speakers, it's not far fetched you also got a big room with likely not too close listening distance. Yes, that are assumptions and I'm not saying that's the solution for everything but the big AMTs performances are impressive in some areas. It is - as always - a compromise you have to decide for yourself. But you can't claim you cannot cross over AMTs low.
Nowadays you can get very good AMTs for even around 100-150 bucks.
If you really need to cross well below 2khz and have a large budget, maybe a dedicated mid is the way to go, then no limit on what goes above it.
But we all have our preferences, each with it's limitations or set of compromises.
But we all have our preferences, each with it's limitations or set of compromises.
The Aurum Cantus AST 2560 is a good bet around that price point. It can cross as low as 2khz with a steep filter.
That is the point. With ribbon there has to be a "qualifier" somewhere. The lower price ATM starts to roll off at 3KHz!!!
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Going back to the OP's original question, look at the TLab range. The ceramic dome version is supposed to sound excellent, crosses low and isnt crazy expensive. Probably the flattest response of any tweeter, period.
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Hi Bill,
The AST2560 is the only AMT that I've used but it is my favorite and it's affordable compared to the high end domes and ribbons. I also own a pair of Raals that are very nice but the AST2560 is my 1st choice for accuracy and realism. Curt crossed them at about 2.3K in the Bordeaux. BTW, a Bordeaux kit is now available at Meniscus.
My order of preference is, AMT, Ribbon and finally domes. The accuracy of the AST2560 is the best I've heard from a tweeter. Mundorf, etc. may be as good or better but I've not used them. The AST2560 is a killer tweeter for the money, IMHO. I've used a LOT of Fountek NEOCD3.0 ribbons and like them for the price but the Raal is a step up. If I wanted an affordable ribbon that crossed low, Bozhen would be my choice today. TLabs was my favorite dome but I read last week they have ceased production and closed the doors. Too bad, it was a very nice sounding dome.
Here's a measurement at 2.8V. of the AST2560 we used in the Bordeaux.
Jim
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That is one more over generalization 🙁
What counts is the resulting acoustical slope, which is a more complex function of crossover and driver properties.
For example, to reach a 4th order high pass for a tweeter, in most situations a third or even second order electrical high pass does the job.
Wow Jim, that AC is very flat, all the way down to 2khz.
Sad to hear about TLab. I read that a TLab mid dome was in prototype, which would have been a killer product.
Sad to hear about TLab. I read that a TLab mid dome was in prototype, which would have been a killer product.
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That AC is not that flat by itself when I check the manufacturer's specs.
I guess that there is some equalizing in the crossover at the expense of efficiency, which is no problem in itself.
I guess that there is some equalizing in the crossover at the expense of efficiency, which is no problem in itself.
Wow ... One page to four, overnight. T-Labs going out of business SUCKS. I had wanted to eventually use a pair of their carbon fiber tweeters in a project.
I have never even heard a pair of TLabs.
The thread went just as I had hoped, and I'm enjoying learning what I can. I do not necessarily feel ribbons are always better than domes. I just know, the RAAL 70-20XR Amorphous Core Tweeters, I once owned, were the best I have personally heard, in MY opinion. I have not heard Be domes yet. I just know the vibrancy and immediacy of the ribbons were amazing. Now, after using the Heils, I am starting to think I like AMTs sound and presentation even better. If modern AMTs are an improvement over the Monopole Heils, then I am very impressed.
I have never even heard a pair of TLabs.
The thread went just as I had hoped, and I'm enjoying learning what I can. I do not necessarily feel ribbons are always better than domes. I just know, the RAAL 70-20XR Amorphous Core Tweeters, I once owned, were the best I have personally heard, in MY opinion. I have not heard Be domes yet. I just know the vibrancy and immediacy of the ribbons were amazing. Now, after using the Heils, I am starting to think I like AMTs sound and presentation even better. If modern AMTs are an improvement over the Monopole Heils, then I am very impressed.
Nope, that was the raw driver with no crossover attached. This is real world testing, not manufacture specs.
Jim
How much smoothing was applied to the frequency curve?
I don't see it specified, so the flatness is difficult to judge.
Can't see on tapatalk where u are based but grab a pair while you can. They are robust tweeters, altho look for more recent stock with grills (my Be TLabs don't..)
I have ns1000m and I use Raal ribbons instead of the yamaha beryllium tweeter. I had focal 1027be before the Yams. There's loads of good tweeters out there, the mundorf at is good as are the various accutons and there's plenty of good soft domes too. The RAALs are excellent but I could live with many of the better dome types including the ring radiators and the satori.
Not quite. Ofcourse not every AMT but you can get several in that price range which can do 2kHz with no problem.
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