Metal dome tweeter advice

[5th element]

Originally Posted by lduarte1973

4.5 "

The DXT doesn´t sound harsh ?

A 3.5kHz xover now makes reasonable sense considering its size.

The DXT does not sound anything close to being harsh.

[lduarte1973]

Thanks for your help, i´ll order a pair from Europe audio today and let you know how the speaker sounds

[5th element]

A tip for designing with the DXT. If you look at the frequency response graph in the SEAS datasheet you will see that at around 15kHz the response flattens out at about 87dB. This is the true sensitivity of the driver.

The hump to the left of this is caused by the wave-guide itself and must be equalised out with a notch fiilter.

[sreten]

Hi,

Buying a tweeter that most probably won't work with the existing x/o
is not a good idea. If replacing a cheap and presumably bad tweeter,
the best choice is a relatively cheap but good tweeter, like the Seas.

Referring to the 27TFF not the DXT of course. YMMV but the latter
IMO is a very poor choice as a substitute without x/o redesign.

rgds, sreten.

[5th element]

Except it was stated at the start that the person who's going to replace the tweeter is an electrical engineer and is going to redesign the crossover. Granted, being a qualified EE doesn't make you automatically qualified for redesigning a crossover, but it is a very good starting point and given their background it should make the basics and concepts fairly easy for them to understand.

[tvrgeek]

Might just have to look at the dxt a bit myself. I try to avoid too many notch and shelves. The price of copper has gone crazy and not the crossover costs more than the drivers.

I already expressed my caution that the crossover is not what the book says, but an iterative test and listen process, even if you have a full measurement suite. A textbook crossover will sound horrid with the best tweeter.

[lduarte1973]

my friend liked this one , what do you think ?

H1322-06 - Seas 29TAF/W 1 inch tweeter aluminium dome - Europe Audio

[a.wayne]

Put a small dimple in the center , works like magic ....

[5th element]

There's nothing wrong with it, just like there's nothing wrong with the majority of the tweeters that have been mentioned in this thread, all of them will work, but you have to decide if there is something in particular that you want this tweeter to be, or something you want it to do.

The 27TBFCG, 27TDFC and the 27TDF all have an overall frequency response that is superior to the 29TAFW, so from that point of view I'd rather go with one of those rather then the 29TAF. They all have low distortion but out of the first three alone I would pick the 27TBFCG.

All good quality dome tweeters will accomplish the same thing and sound similar because they are all doing the same job.

The main reason why I recommended the DXT is because it actually does something useful for you that normal domes don't, that is maintaining a better response off axis. As this is how this loudspeaker will be used it seems like an obvious choice, the fact the tweeter isn't madly expensive and has very good measured performance is a bonus. It will be slightly harder to work with then a normal dome though.

It almost seems like you're looking at all the tweeters, making up your mind about one, then going, oh what about this one. This almost proves the point that there are lots of rather decent tweeters out there that you could choose from. If the idea of the DXT isn't a huge hit then get something else, but remain objective about it. If you don't want the DXT, but do want a metal dome, then look at the 27TBFCG and the 29TAFW. Both are good performers but maybe you simply prefer the look of the 29TAFW, that sounds like a good enough reason to perhaps buy one rather then the other. Perhaps the fact the 27TBFCG has a flatter frequency response is more important to you though.

[lduarte1973]

Originally Posted by a.wayne

Put a small dimple in the center , works like magic ....

a dimple ?