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FANE 12-250tc FULL RANGERS
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Hartmut View Drop Down
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Points: 7 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Hartmut Quote  Post ReplyReply Direct Link To This Post Posted: 19 June 2018 at 10:06pm
As the speakers are still not available in Germany I still wait.
But reading on other websites about full range chassis in general brought up the opinion that I also will rather go with a closed 40l cabinet instead of a bass reflex. The bass reflex would not go that much deeper but has a resonance around 120 Hz. So I will accept 80 Hz along with a smooth upper bass and if I need deeper bass I will build an additional woofer.


Edited by Hartmut - 19 June 2018 at 10:08pm
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Originally posted by Hartmut Hartmut wrote:

reading on other websites about full range chassis in general brought up the opinion that I also will rather go with a closed 40l cabinet instead of a bass reflex. The bass reflex would not go that much deeper but has a resonance around 120 Hz. So I will accept 80 Hz along with a smooth upper bass and if I need deeper bass I will build an additional woofer.
I think you'll find that the peak in a reflex enclosue for the Fane is more or less where you would want one to be for pleasing music reproduction (and that's intentional). +2dB from 90 to 130Hz isn't something that will interfere with the quality of the music reproduction but the bass will feel noticeably louder and more full overall (especially as you're getting +2 to +3dB on all bass frequencies below 140Hz with a port).

It's not the ideal driver for porting but I wouldn't worry about a boomy or unnatural sound due to that peak where it is. Do you have any genuinely flat response reference monitors or headphones available for testing? (ironically a lot of those will even have a couple of dB boost in that area, which you can see from checking manufacturers' published response plots). Try adding an EQ boost of 2dB to that region (with free software like Audacity if you have nothing more suitable), or ideally try and approximate the WinISD curves of both sealed and ported onto the flat response, and see what difference it makes.


Edited by Hemisphere - 19 June 2018 at 10:48pm
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leoandsmokey View Drop Down
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Points: 24 		Post Options Post Options   Thanks (0) Thanks(0)   Quote leoandsmokey Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2018 at 12:17am
Originally posted by Dub Specialist Sound Dub Specialist Sound wrote:

Tbh leo , not yet havent got around it yet, so busy building boxs atm

will update asap

Thanks for the reply Dub Specialist.  No need to hurry.  But I am keen to see what you think as I have similar project in mind to what you described. Cheers!
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mfelt View Drop Down
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Sorry to bring the thread back up but I have a question about increasing the dispersion of the HF whizzer-

if you were to mount an empty horn in front of the middle of the driver would you potentially be able to disperse the high frequencies to the same amount as you could from a horn loaded tweeter? or at least improve the dispersion to some extent?

Cheers for any future replies!
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For this you have multiple membrane drivers. With horns already mounted on them.
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studio45 View Drop Down
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A horn wouldn't really work - you need an air tight seal at the throat - half the sound would just go around it, not through it!
You might have more success with an acoustic lens....You can make a rudimentary one from stacked pieces of perforated steel grille. Look up "JBL potato masher" for inspiration ;)
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Elliot Thompson View Drop Down
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Originally posted by mfelt mfelt wrote:

Sorry to bring the thread back up but I have a question about increasing the dispersion of the HF whizzer-

if you were to mount an empty horn in front of the middle of the driver would you potentially be able to disperse the high frequencies to the same amount as you could from a horn loaded tweeter? or at least improve the dispersion to some extent?

Cheers for any future replies!



Your method will bring forth degrading results. If you must increase the high frequency of a full range driver using a whizzer cone, increase the high frequencies on your equaliser to suit your musical taste.

 

I would recommend focusing on papers from loudspeaker manufactures who designed whizzer cone loudspeakers from the 1940's - 1950's. Even from a marketing point of view, the information provided by such manufactures when whizzer cones were popular in the consumer market, is far greater than what manufactures offer today in terms of information regarding whizzer cones.



Best Regards, 


Edited by Elliot Thompson - 29 November 2018 at 12:11pm
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mfelt View Drop Down
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Points: 6 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mfelt Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2018 at 5:43pm
Hi, thanks for your reply!

It wasn't that I was looking to increase the high frequencies, only the dispersion of them.

But all i needed to know was that it wouldn't work! thank you.

Last question then I'll shut up- might be the same answer (seems likely) but what about some sort of thin shutters fanning out as shown (badly) on this image i made. they could perhaps redirect some more of the high frequencies to a much larger angle of dispersion horizontally.
is that ridiculous or not a bad idea?



Thanks!
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Elliot Thompson View Drop Down
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Points: 5175 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Elliot Thompson Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2018 at 7:02pm
Originally posted by mfelt mfelt wrote:

Hi, thanks for your reply!

It wasn't that I was looking to increase the high frequencies, only the dispersion of them.

But all i needed to know was that it wouldn't work! thank you.

Last question then I'll shut up- might be the same answer (seems likely) but what about some sort of thin shutters fanning out as shown (badly) on this image i made. they could perhaps redirect some more of the high frequencies to a much larger angle of dispersion horizontally.
is that ridiculous or not a bad idea?



Thanks!


If you explore compression tweeters, you will notice the horn is extremely short. What you are proposing is to lengthen the pathway of the whizzer cone (shaped as a horn) in which, will offer a wider dispersion. This concept will only reduce the high frequencies above 8 kHz and focus on frequencies below 6 kHz.

 

If you want a wide dispersion tweeter above 8 kHz, look at the old JBL 2405 or 2404.

They are the only Tweeters from my experience that are capable of wide dispersion above 8 kHz.

 

Best Regards,

Elliot Thompson
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mfelt View Drop Down
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Thanks for your help!

Much appreciated
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Points: 3122 		Post Options Post Options   Thanks (0) Thanks(0)   Quote snowflake Quote  Post ReplyReply Direct Link To This Post Posted: 25 August 2020 at 12:54pm
looking to make some cheap and cheerful monitors for a venue with these. thinking of adding a capacitor and polyswitch in series to improve bass response and add some protection. 330uF and 5A seem about right for 20L Vb - anyone tried this and can suggest better values?
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Points: 1083 		Post Options Post Options   Thanks (0) Thanks(0)   Quote fatfreddiescat Quote  Post ReplyReply Direct Link To This Post Posted: 25 August 2020 at 4:24pm
Looks about right, they are hot in the hf on axis so may want to pad that down, great vocal sound out of these drivers.
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