Kick Bin Design Idea B&C 15ndl76 |
Post Reply | Page <1 56789 11> |
Author | |
luthier
Registered User Joined: 21 July 2013 Location: UK - London Status: Offline Points: 271 |
Post Options
Thanks(0)
|
Other slightly nutty idea is a massive phase plug in the vrc. something like this
|
|
JulianDA
Registered User Joined: 29 May 2018 Location: Soest, Germany Status: Offline Points: 112 |
Post Options
Thanks(0)
|
To my knowledge your frontchamber ends at the place of smallest area inside your hornpath. So the blue part seems correct. But is there a special reason to have it angled like you did? i always simulate to the smallest point, so for me it would end in a straight horizontal line.
Oh and sorry for not replying after you posted your Hornresp input. I did simulate it myself, but then i forgot to answer in time |
|
luthier
Registered User Joined: 21 July 2013 Location: UK - London Status: Offline Points: 271 |
Post Options
Thanks(0)
|
It doesn't fit any other way I've tried! it's a trapezoidal cab which makes everything difficult!
It's got a 20 degree splay angle so unless I make it wider I cant move the driver angle the driver any more or lower down it down. Hopefully this picture helps to explain it. |
|
JulianDA
Registered User Joined: 29 May 2018 Location: Soest, Germany Status: Offline Points: 112 |
Post Options
Thanks(0)
|
I mean the blue part in this picture. The angle of the end of the frontchamber doesnt make sense to me. I would mark the end horizontal to the back of the cab at the smallest point (so it gets a little bit bigger) |
|
luthier
Registered User Joined: 21 July 2013 Location: UK - London Status: Offline Points: 271 |
Post Options
Thanks(0)
|
So I have spent a little while changing the chamber around and this seems to work a little better, the chamber is now 21.4 % smaller, however it's still not small enough for the bandwidth extension I want.
Edited by luthier - 02 February 2019 at 8:23pm |
|
fatfreddiescat
Young Croc Joined: 15 October 2010 Location: N.E.Wales Status: Offline Points: 1081 |
Post Options
Thanks(0)
|
Could you not flip the driver, face it against a baffle board with a slot forming the throat, the chamber would then become little more than that of cone, if you search for martin 215 mkIII you will see what I'm refering to, you would have a near 180 degree bend but may work, wouldn't be hard to build a non trap box to test the concept.
|
|
luthier
Registered User Joined: 21 July 2013 Location: UK - London Status: Offline Points: 271 |
Post Options
Thanks(0)
|
Looks like I might finally have a design now, If I put my 20 degree off-axis plot on top of my on-axis plot this is what I get.
Plan is to cross 90 -360hz to the Mr8xt which will cross 340-2500hz then CD10fe/sth100 to 20khz. Should be around 140db +/- 3db spl continuous at full power. I imagine I will need a bit of +3db eq between 330 -400hz and 120 - 150 hz. Next step for me is to look into the issue of wave cancellation in the horn mouth. Edited by luthier - 02 February 2019 at 8:52pm |
|
fatfreddiescat
Young Croc Joined: 15 October 2010 Location: N.E.Wales Status: Offline Points: 1081 |
Post Options
Thanks(0)
|
Cool, look forward to seeing the results, for some reason I thought you using Inventor as was going to ask if you could a a screen capture vid on the drawing process, will get there eventually.
|
|
luthier
Registered User Joined: 21 July 2013 Location: UK - London Status: Offline Points: 271 |
Post Options
Thanks(0)
|
I can do a capture video of modelling in Solidworks if you want?
|
|
fatfreddiescat
Young Croc Joined: 15 October 2010 Location: N.E.Wales Status: Offline Points: 1081 |
Post Options
Thanks(0)
|
That's a very kind offer, I could possibly ask my son to look it over with me as he has some experience with both solidworks and inventor although we only have inventor available to us at the moment, he should be able to help me translate the process into inventor.
|
|
luthier
Registered User Joined: 21 July 2013 Location: UK - London Status: Offline Points: 271 |
Post Options
Thanks(0)
|
I can get a 30 day free trial of inventor, I'm happy to have a go and post a video of cab design once I've got my head around it.
I'll probably stick it in another seperate thread on speakerplans. Edited by luthier - 02 February 2019 at 10:06pm |
|
fatfreddiescat
Young Croc Joined: 15 October 2010 Location: N.E.Wales Status: Offline Points: 1081 |
Post Options
Thanks(0)
|
That would be brilliant and should be useful to all, thank you.
|
|
Post Reply | Page <1 56789 11> |
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 |