How do Danley speakers work? |
Post Reply | Page <1 3456> |
Author | |||
_djk_
Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002 |
Post Options
Thanks(0)
|
||
"As I look at it, it seems it's still not very large area for air to get out trough."
Ever look at the slits in a phase plug for a horn driver? Typically a 10:1 ratio. I don't generally recommend going over 4:1 for cone drivers. |
|||
djk
|
|||
Crashpc
Registered User Joined: 26 February 2008 Location: Czech Republic Status: Offline Points: 463 |
Post Options
Thanks(0)
|
||
_djk_ Yes, I´ve seen these before. Just wasn´t sure it´s used as it is.
Then it seems to be about okay :-D |
|||
Nikon and Canon people should not be married to each other. Why did you let this happen?
|
|||
toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
Post Options
Thanks(0)
|
||
Tapped horns don’t need the large frontal area that front loaded horns do. Look at the TH221 for example.
It’s all about the impedance matching to the air in front. Edited by toastyghost - 21 August 2017 at 11:34pm |
|||
toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
Post Options
Thanks(0)
|
||
Missed this but in principle you’re right but this is the entirety of the waveguide’s work - read the DOSC patent and the optical parallels it draws on to see how they attempt to combat this. Ribbons go a step further. |
|||
Crashpc
Registered User Joined: 26 February 2008 Location: Czech Republic Status: Offline Points: 463 |
Post Options
Thanks(0)
|
||
Toastyghost: I'm well aware of that. The ratio of cone area and output area seems to be still very high.
|
|||
Nikon and Canon people should not be married to each other. Why did you let this happen?
|
|||
Hemisphere
Old Croc Joined: 21 April 2008 Status: Offline Points: 2272 |
Post Options
Thanks(0)
|
||
Perhaps Danley should be informed?
|
|||
Crashpc
Registered User Joined: 26 February 2008 Location: Czech Republic Status: Offline Points: 463 |
Post Options
Thanks(0)
|
||
Bhaha, no. He knows best. It´s just I´m curious. Collecting data on tapped horns, and i´ve read many times, that common rule of thumb (again) is, that the mouth area shouldn´t be smaller than Sd of all drivers in the horn. mr. Danley again proves for us, that rules of thumb are pretty weak, and only work with very conventional designs. Once you go "radical" at it, things work differently then expected.
|
|||
Nikon and Canon people should not be married to each other. Why did you let this happen?
|
|||
toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
Post Options
Thanks(0)
|
||
It’s not just that exit operating on its own though, look at how huge the horn is that it exits into - which produces additional loading to the air at the shared mouth |
|||
odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
Post Options
Thanks(0)
|
||
Yup, you must consider both the front and the back of the driver as a function of frequency. It is like bootstrapping an electronic circuit. Impedance changes depending on what each side of the driver is seeing.
|
|||
Crashpc
Registered User Joined: 26 February 2008 Location: Czech Republic Status: Offline Points: 463 |
Post Options
Thanks(0)
|
||
Sure. It firstly begun at the thought that it only comes from those small circular holes. Now it´s obvious there is hell lot on this. I was firstly wondering if TD did some insane miracle or of it is just few pieces of quite obvious facts I don´t see... Now it´s all understandable.
|
|||
Nikon and Canon people should not be married to each other. Why did you let this happen?
|
|||
toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
Post Options
Thanks(0)
|
||
The small holes aren't ports by the way, they're acting as physical bandpass filters. Well, some of them, others are ports, enabling the whole horn to act as a tapped horn for extra low frequency extension – that's a core difference from Unity Horn to Synergy Horn, the addition of tapping to extend the response.
For example, here's the SH96 from the front: And from the rear: If you look closely, the openings for the 4" drivers on the top and bottom are a different size and location from the apex than the ones on the sides too. That's also an old photo, the current version uses a B&C DE880TN instead of the Faital HF unit. Edited by toastyghost - 22 August 2017 at 7:36pm |
|||
Crashpc
Registered User Joined: 26 February 2008 Location: Czech Republic Status: Offline Points: 463 |
Post Options
Thanks(0)
|
||
I did not suggest these are ports. I´ve also seen some presentations mentioning the same. The holes doing bandpass. No issue with that. No issue with anything now...
|
|||
Nikon and Canon people should not be married to each other. Why did you let this happen?
|
|||
Post Reply | Page <1 3456> |
Tweet |
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |