what large radiating area tweeters are available?

[charlielaub]

After seeing a recent post about a pair of North Creek tweeters for sale, I started wondering how many "good" tweeters are available that have larger radiating area, e.g. with a dome or diaphragm that is greater than 30mm in diameter.

A larger diameter diaphragm (and/or an increase in Xmax) can increase swept volume displacement (Vd=Sd*Xmax) making it possible to use the driver down to 1k Hz or lower. The tradeoff of a larger diameter radiating surface is that the off-axis response starts to fall off below 10k, so power response in the upper octave will droop. For instance, I have a pair of 2" Tang Band "full range" W2-800SL drivers that I have wanted to use in a 2-way with an 8" or 10" woofer just to check out this concept. This is pretty big for a "tweeter", however a driver like this, with good sensitivity but with a slightly smaller diameter diaphragm (e.g. 35mm) seems to be impossible to find. Maybe we could get one designed and do a group buy?!?!

I have always wondered why there are not more (if any) tweeters with a piston diameter between about 30mm diameter and 45mm diameter. If you are aware of drivers that fit this description, and that don't have very low sensitivity a la some offerings from Hi-Vi, please post info.

Also, if you can give some good technical background on the issues surrounding tweeter design and larger diameter diaphragms, please chime in.

Thanks,

-Charlie

[DjDisturbed]

Re: what large radiating area tweeters are available?

The only large dome tweeter that I have ever seen has been the ScanSpeak D3806/8200 . I think that Madisound still carry's it and I have never heard one or seen anyone use it. It had a 38 mm dome or 1.5 " and a Fs of about 450 hz.
I have always wanted to buy a couple but the cost of them always kept me away from them. I like ScanSpeak tweeters the 9500 is one of my favorites but now with so many great tweeters for about 1/3rd the price I can find the value in them anymore.

[robert]

Re: what large radiating area tweeters are available?

Audax 34mm "mid-tweeter" dome. It has the surface area, but the FR is a little odd.

https://www.madisound.com/store/product_info.php?manufacturers_id=120&products_id=1707

Cheers / Robert

[Deward Hastings]

Re: what large radiating area tweeters are available?

"good" tweeter [with] larger radiating area, e.g. with a dome or diaphragm that is greater than 30mm in diameter.

Aura NSW2-326-8A

https://www.madisound.com/store/manuals/NSW2-326-8A.pdf

Good down to about 800 Hz LR4. Needs a little equalizing on the high end. A 3886 takes it to full output (about 102 dB . . . plenty for that range).

[benchtester]

Re: what large radiating area tweeters are available?

The only large dome tweeter that I have ever seen has been the ScanSpeak D3806/8200 . I think that Madisound still carry's it and I have never heard one or seen anyone use it. It had a 38 mm dome or 1.5 " and a Fs of about 450 hz.
I have always wanted to buy a couple but the cost of them always kept me away from them. I like ScanSpeak tweeters the 9500 is one of my favorites but now with so many great tweeters for about 1/3rd the price I can find the value in them anymore.

Someone has a pair for sale in the classifieds right now:

http://techtalk.parts-express.com/showthread.php?t=222082

I don't know the driver or the seller. I'll bet they sound good, but the off-axis is pretty scary.

[mzisserson]

Re: what large radiating area tweeters are available?

Hey Charlie,
I am using THIS right now in an 8" 2-way. I have started my preliminary testing, and usuing a calibrated Dayton mic and a 24th/octave RTA, I am using it crossed over at 1,1K with NO audible or measurable (well, RTA wise anyway) difficulties to 95dB with pink noise. It still has output as low as 800Hz which is the 20dB down point at x-over. Dang near flat from 1K-18K or so.

Seems no matter how I try to bang it up or break it, it takes it with elegance. It is not a "large" dome, and there was some question as to its defined x-max since it is stated linear is 0.3mm, but its air gap is stated as 3mm.

Since I am a Scan fanboy, I decided to give it a try. As usual, Scan has yet to let me down and has yet again exceeded my expectations. At $55/ea, they are also affordable.

[Pete Schumacher]

Re: what large radiating area tweeters are available?

After seeing a recent post about a pair of North Creek tweeters for sale, I started wondering how many "good" tweeters are available that have larger radiating area, e.g. with a dome or diaphragm that is greater than 30mm in diameter.

A larger diameter diaphragm (and/or an increase in Xmax) can increase swept volume displacement (Vd=Sd*Xmax) making it possible to use the driver down to 1k Hz or lower. The tradeoff of a larger diameter radiating surface is that the off-axis response starts to fall off below 10k, so power response in the upper octave will droop. For instance, I have a pair of 2" Tang Band "full range" W2-800SL drivers that I have wanted to use in a 2-way with an 8" or 10" woofer just to check out this concept. This is pretty big for a "tweeter", however a driver like this, with good sensitivity but with a slightly smaller diameter diaphragm (e.g. 35mm) seems to be impossible to find. Maybe we could get one designed and do a group buy?!?!

I have always wondered why there are not more (if any) tweeters with a piston diameter between about 30mm diameter and 45mm diameter. If you are aware of drivers that fit this description, and that don't have very low sensitivity a la some offerings from Hi-Vi, please post info.

Also, if you can give some good technical background on the issues surrounding tweeter design and larger diameter diaphragms, please chime in.

Thanks,

-Charlie

The RS28F can cross at 1KHz on a flat baffle. Put it in a waveguide and you could reach 800Hz.

Scanspeak has a few tweeters that can cross at 1KHz, notably the 6600. DoubleTap put that one in a custom waveguide and crossed it at 875Hz to a W22 Excel. Very impressive performance.

[lhwidget]

Re: what large radiating area tweeters are available?

Charlie,
I've seen these two in Voice Coil

Wavecor 30 mm

http://www.wavecor.com/html/tw030wa05_to_08.html

And the Seas Exotic (a 35 mm dome which is stupid expensive)

https://www.madisound.com/store/product_info.php?cPath=45_229_324&products_id=8537

[Wolf]

Re: what large radiating area tweeters are available?

Fostex FT48D

https://www.madisound.com/store/product_info.php?manufacturers_id=131&products_id=288

Audax TW034XO

https://www.madisound.com/store/product_info.php?manufacturers_id=120&products_id=1707

Ciare MT320, Ciare PT 383, Chario Sonnet 32mm

http://www.troelsgravesen.dk/large_domes.htm

ScanSpeak D3806/8200-00

https://www.madisound.com/store/product_info.php?manufacturers_id=148&products_id=8711

Mavin 1.5" glass-fiber (linked before on the TT forum. See uploaded pic)

Seas Exotic T35 X3-06

https://www.madisound.com/store/product_info.php?products_id=8537

Seas T29 Crescendo and Magnum, 29TAF/W, 29TFF/W:

https://www.madisound.com/store/product_info.php?products_id=1594

https://www.madisound.com/store/product_info.php?products_id=8169

https://www.madisound.com/store/product_info.php?manufacturers_id=149&products_id=1590

https://www.madisound.com/store/product_info.php?manufacturers_id=149&products_id=1591

Herb's Cerwin Vega proto-6.5" dome woofers


What I'm wndering is why SB doesn't come out with a 'Super-Dimple'? Maybe in a 2"-2.5" form-factor.

Later,
Wolf

[Pete Schumacher]

Re: what large radiating area tweeters are available?

What I'm wndering is why SB doesn't come out with a 'Super-Dimple'? Maybe in a 2"-2.5" form-factor.

Later,
Wolf

I'd prefer it to be called the Double-Dimple.



And when are you going to put those dome woofs in a project?

[Wolf]

Re: what large radiating area tweeters are available?

And when are you going to put those dome woofs in a project?

You'd require another surround then, Pete, that's why I didn't say 'double-dimple'. That did occur to me.

They aren't MY dome-woofers. They're Herb's.
Later,
Wolf

[MSaturn]

Re: what large radiating area tweeters are available?

It was already said, but:

The RS28F is going to basically trump everything as far as low end extension, high end extension, and price. It's also very well-built and basically doesn't have audible distortion if you cross it right (and that's as low as 1.2Khz in my experience)
This seems very interesting. I don't like Morel's woofers - or most of their tweeters - but they seem to get their mid units right.

[Wolf]

Re: what large radiating area tweeters are available?

If you like the RS28F, maybe so. I'm not sold on it yet. I love the RS28A.

The Morel you linked is a VERY nice mid. I've heard it and it's very nice. But- I don't think it'll reach 20k though, as the ones Charlie wants should.
Later,
Wolf

[raiderone]

Re: what large radiating area tweeters are available?

After seeing a recent post about a pair of North Creek tweeters for sale, I started wondering how many "good" tweeters are available that have larger radiating area, e.g. with a dome or diaphragm that is greater than 30mm in diameter.

A larger diameter diaphragm (and/or an increase in Xmax) can increase swept volume displacement (Vd=Sd*Xmax) making it possible to use the driver down to 1k Hz or lower. The tradeoff of a larger diameter radiating surface is that the off-axis response starts to fall off below 10k, so power response in the upper octave will droop. For instance, I have a pair of 2" Tang Band "full range" W2-800SL drivers that I have wanted to use in a 2-way with an 8" or 10" woofer just to check out this concept. This is pretty big for a "tweeter", however a driver like this, with good sensitivity but with a slightly smaller diameter diaphragm (e.g. 35mm) seems to be impossible to find. Maybe we could get one designed and do a group buy?!?!

I have always wondered why there are not more (if any) tweeters with a piston diameter between about 30mm diameter and 45mm diameter. If you are aware of drivers that fit this description, and that don't have very low sensitivity a la some offerings from Hi-Vi, please post info.

Also, if you can give some good technical background on the issues surrounding tweeter design and larger diameter diaphragms, please chime in.

Thanks,

-Charlie

Why not add a ND16FA 5/8" to the 2" Tang Band at around 5kHz? You can probably use a second order on the TB at around 1kHz.

The off axis responses on some of the larger domes don't inspire there use alone....perhaps the threshold is 1 1/8" before the domes' off axis suffers.

[Wolf]

Re: what large radiating area tweeters are available?

Soooo... SB should do a Double-Dimple coax? That would be like blending the HiVi S1 and the SB29- it would look really cool too!

Later,
Wolf