2x15" front loaded horn F2B |
Post Reply | Page <1234 9> |
Author | ||
citizensc
Young Croc Joined: 16 October 2015 Location: Perth,Australia Status: Offline Points: 532 |
Post Options
Thanks(0)
|
|
Is it really much of an issue to add 10 or 15mm depth to the rear chamber to accommodate a wider selection of drivers, as long as you keep the same rear chamber volume? Obviously the external dimensions wont batch a real F2B but if you have no intention of stacking them with existing F2Bs then who cares?
|
||
concept-10
Young Croc Joined: 17 May 2016 Status: Offline Points: 1292 |
Post Options
Thanks(0)
|
|
No it's not an issue, it's a good plan and while you are doing it you can get the rear chamber volume correct for the driver you are choosing, though I an not convinced it is 100% accurate to the original it is a very good starting point to make something very special.
|
||
snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3118 |
Post Options
Thanks(0)
|
|
Beyma 15LX60V2 |
||
VECTORDJ
Young Croc Joined: 11 June 2006 Location: United States Status: Offline Points: 513 |
Post Options
Thanks(0)
|
|
Hi bob4, Do You have any other plans??
|
||
djeddie
Old Croc Joined: 26 April 2004 Location: Bristol Status: Offline Points: 4125 |
Post Options
Thanks(0)
|
|
There is another trick... and that's to route out a few mil in the access hatch.
|
||
Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB
|
||
levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
Post Options
Thanks(0)
|
|
How realistic are the quoted response figures ? Has anyone tried extending this to 1220mm height, to fit across 2x modern subs? Looking at drivers, sure it would not be difficult find drivers that match the important TS parms, and adopt chambers accordingly.
|
||
Global Depopulation - Alive and Killing.
|
||
levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
Post Options
Thanks(0)
|
|
Might be good for <150hz, but would it really excel above 200hz?
|
||
Global Depopulation - Alive and Killing.
|
||
Jimmer
Old Croc Joined: 30 April 2010 Location: Stroud / Glos Status: Offline Points: 2604 |
Post Options
Thanks(0)
|
|
Flat upto 250
|
||
Light travels faster than sound....That's why some people appear bright until you hear them speak!
|
||
bob4
Old Croc Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1842 |
Post Options
Thanks(0)
|
|
No, nothing of particular interest...... i just acted as a strawman in this case.....
|
||
djeddie
Old Croc Joined: 26 April 2004 Location: Bristol Status: Offline Points: 4125 |
Post Options
Thanks(0)
|
|
Can concur with that.
|
||
Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB
|
||
citizensc
Young Croc Joined: 16 October 2015 Location: Perth,Australia Status: Offline Points: 532 |
Post Options
Thanks(0)
|
|
No need for the cookie, my lock-down baking game has been off the chain! My goal here isn't to draw up an exact F2B copy, there is some debate about how exact that plan is and I don't think an exact copy is that useful. A design that suites a wide range of drivers and can be built by a Disco Dave with a circular saw is more my kinda thing. I have drawn up a slightly modified version in sketchup with the goal of making the plan easier to build. I have replaced all the 15mm pannels with 18mm, this should have negligible impact as most of that extra wood has gone in to wasted cavity space. I also changed the baffle a little bit. The baffle now consists of a piece of 18mm ply with the driver cutout and rebate stuck to a 6mm piece of ply with the throat adaptor cut in to it. With these changes I wouldn't call this a difficult build, id rather build this than a double punisher (iv built 7 of those and they are a pain). I am not sure about the method I used to find the hornresp inputs. Below is an image of how I did it, black line is the path and dotted lines are the segments, where I measured the horn diameter. Id love some feedback on this, is there a best practice way of doing it? 2 drivers @ 4ohm 2 x F2B, 4 drivers @ 8 ohm Once I get my sim parameters sorted, im happy to sim a number of different drivers. I will also go about increasing the depth of the rear chamber to accommodate more drivers. Here is a link to the sketchup drawing https://www.dropbox.com/s/1quejvp5zda1b7s/hornresp.skp?dl=0 |
||
djeddie
Old Croc Joined: 26 April 2004 Location: Bristol Status: Offline Points: 4125 |
Post Options
Thanks(0)
|
|
One thing to bear in mind with the F2B is that it's a bifuricated horn... meaning it's two throats sharing one mouth, not two throats having "half the mouth" each (for want of a better phrase). Much like a HF horn that has two CD's on it... if you see what I mean.
|
||
Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB
|
||
Post Reply | Page <1234 9> |
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 |