I agree that of what’s currently available, the Tang Band and Visaton could be added to the Fostex FF85K. The Fostex from Madisound or enabled from planet10, losing smoothness but being able to play still lower.
Btw, the benefit I see in being able to cross lower (not for an immediate project) in the range from 1000 to "normal" tweeter XO points - is more detail and better off axis response .
Btw, the benefit I see in being able to cross lower (not for an immediate project) in the range from 1000 to "normal" tweeter XO points - is more detail and better off axis response .
Hi,
What is it that you see in that tweeter?
If you want low xo and high output, buy a waveguide.
And... again. That frequency plot is useless.
I did a comparison on the Extrimist and a SS driver. Take a look:
Frq plot compare
On the tweeter graph, you have from 0 to 100dB ??? It has 5dB bumps. Useless. Its distortion rises below 2KHz... i wouldnt cross it below 2500Hz. And then, whats the point? Theres way better tweeters out there.
What is it that you see in that tweeter?
If you want low xo and high output, buy a waveguide.
And... again. That frequency plot is useless.
I did a comparison on the Extrimist and a SS driver. Take a look:
Frq plot compare
On the tweeter graph, you have from 0 to 100dB ??? It has 5dB bumps. Useless. Its distortion rises below 2KHz... i wouldnt cross it below 2500Hz. And then, whats the point? Theres way better tweeters out there.
Syncroniq
Though it’s a bit off topic, being on mid-woofers, for those who cant read Danish, what are the 2 comparative graphs comparing?
> tweeter graph, you have from 0 to 100dB ??? It has 5dB bumps
Which tweeter are you refering to?
> If you want low xo and high output, buy a waveguide.
If you're referring to the recent Seas tweeter with waveguide (29TFF/W H1318) has higher sensitivity of 92 dB. But with 0.5 mm Xmax, vs 1.8 mm in the ADI, I don’t think would go so low when the power levels are up. And its (Seas graph) off axis response drops off rapidly after 4 kHz.
http://www.seas.no/index.php?option=com_content&task=view&id=95&Itemid=119
The ADI CeraDome (ADI graph) off axis doesnt really drop off until after 15 kHz . .
Though it’s a bit off topic, being on mid-woofers, for those who cant read Danish, what are the 2 comparative graphs comparing?
> tweeter graph, you have from 0 to 100dB ??? It has 5dB bumps
Which tweeter are you refering to?
> If you want low xo and high output, buy a waveguide.
If you're referring to the recent Seas tweeter with waveguide (29TFF/W H1318) has higher sensitivity of 92 dB. But with 0.5 mm Xmax, vs 1.8 mm in the ADI, I don’t think would go so low when the power levels are up. And its (Seas graph) off axis response drops off rapidly after 4 kHz.
http://www.seas.no/index.php?option=com_content&task=view&id=95&Itemid=119
The ADI CeraDome (ADI graph) off axis doesnt really drop off until after 15 kHz . .
Hi,
Im refering to the CeraDome. Useless freq plot.
See my link where i compare a extrimist with a ScanSpeak 18W. On paper the Extrimist look just as linear. But, thats becourse of the graphs y aksis poor resolution. When i plot both drivers in the same graph, its easy to see how nonlinear the extrimist is. The same is the case for the CeraDome. One poor freq plot. Not that linear having 5dB bumps...
Im refering to the CeraDome. Useless freq plot.
See my link where i compare a extrimist with a ScanSpeak 18W. On paper the Extrimist look just as linear. But, thats becourse of the graphs y aksis poor resolution. When i plot both drivers in the same graph, its easy to see how nonlinear the extrimist is. The same is the case for the CeraDome. One poor freq plot. Not that linear having 5dB bumps...
The woofer comparison is between a Scan-Speak 18W and Adire Audio Extremis. Because of the scale that Tang Band uses on their frequency response graphs, their data is more flattering than other manufacturers. He overlaid the manufacturer provided datasheet for the Extremis on the 18W frequency response curve to give a realistic comparison of the drivers.
I don't trust Tang Band's measurements at all (whether they are good or bad in appearance). Thankfully there are a few sites and several forum threads with independent measurements of some of their drivers.
Regarding the comparision between the Extremis and the 18W, I don't think they are as different as your overlaid graph suggests (not your fault at all, as you were using the available data at the time). Looking at Zaph's site, a driver comparision of the 18W and Extremis shows nearly equivalent distortion performance, with the 18W having the edge at very low frequencies and the Extremis having the cleaner upper range. The Extremis frequency response does not seem any less smooth than the 18W in Zaph's measurements, which are done under the same test conditions and should be relatively accurate.
Original Extremis Graph
Zaph's Extremis Graph
Zaph's SS 18W Graph
I don't trust Tang Band's measurements at all (whether they are good or bad in appearance). Thankfully there are a few sites and several forum threads with independent measurements of some of their drivers.
Regarding the comparision between the Extremis and the 18W, I don't think they are as different as your overlaid graph suggests (not your fault at all, as you were using the available data at the time). Looking at Zaph's site, a driver comparision of the 18W and Extremis shows nearly equivalent distortion performance, with the 18W having the edge at very low frequencies and the Extremis having the cleaner upper range. The Extremis frequency response does not seem any less smooth than the 18W in Zaph's measurements, which are done under the same test conditions and should be relatively accurate.
Original Extremis Graph
An externally hosted image should be here but it was not working when we last tested it.
Zaph's Extremis Graph
Zaph's SS 18W Graph
Hi,
Thanks.
I would still rather work with a 18W
And the graphs at Zaph are not much better then the tandband, so its hard to tell differences. But yes, mine is a produkt of the given graphs from the vendors.
I have Clio 7.3, and have meassured alot of 18W's.
Does any one have a impedance graph on the ceradome tweeter, or the extrimist? Would like to see wether the moving mass and suspention matches.
Thanks.
I would still rather work with a 18W
And the graphs at Zaph are not much better then the tandband, so its hard to tell differences. But yes, mine is a produkt of the given graphs from the vendors.
I have Clio 7.3, and have meassured alot of 18W's.
Does any one have a impedance graph on the ceradome tweeter, or the extrimist? Would like to see wether the moving mass and suspention matches.
The graph above has the Extremis impedance, is that not sufficient? I have a pair of Extremis that I can measure if you prefer a second source of data, though I will tell you in advance that Zaph is a far more accurate source of data than I will be (using speaker workshop).
Here are the mechanical parameters derived from soundeasy (on Zaph's site)
I couldn't find a Ceradome impedance graph.
Regards,
David
Here are the mechanical parameters derived from soundeasy (on Zaph's site)
I couldn't find a Ceradome impedance graph.
Regards,
David
In a discussion on XBL2 (re bass drivers) which goes a little above my head, it was said
"their Xmax is a bit over stated, but they are still dramatically more linear than most motors"
http://www.diyaudio.com/forums/showthread.php?s=&postid=1587982&highlight=#post1587982
"their Xmax is a bit over stated, but they are still dramatically more linear than most motors"
http://www.diyaudio.com/forums/showthread.php?s=&postid=1587982&highlight=#post1587982
Syncroniq
> a tweeter does not move
If it did not move, it would produce no sound - you mean its movement is relatively minimal?
By being able to move more than a normal tweeter, the CD is able to produce more sound/ lower.
But apart from that, its possibly more linear; and (is claimed to) have excellent off axis response.
Wonder if a big dealer, eg Parts Express or Madisound, or a specialist dealer eg e-speakers would place an order. With the right price, a number of people would jump at the chance
> a tweeter does not move
If it did not move, it would produce no sound - you mean its movement is relatively minimal?
By being able to move more than a normal tweeter, the CD is able to produce more sound/ lower.
But apart from that, its possibly more linear; and (is claimed to) have excellent off axis response.
Wonder if a big dealer, eg Parts Express or Madisound, or a specialist dealer eg e-speakers would place an order. With the right price, a number of people would jump at the chance
Yes, a design goal IS as low a crossover point as is possible
> and probably lower Fs and lower characteristic SPL, would it not?
While XBL2 bass drivers often have lowish sensitivity, for this ADI claim normal sensitivity. I don’t know how it'd be achieved . .
In Adire days, the (I think now chief ADI designer) Dan Wiggins used to post here
> and probably lower Fs and lower characteristic SPL, would it not?
While XBL2 bass drivers often have lowish sensitivity, for this ADI claim normal sensitivity. I don’t know how it'd be achieved . .
In Adire days, the (I think now chief ADI designer) Dan Wiggins used to post here
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.