Speakerplans.com Homepage
Forum Home Forum Home > Plans > Other plans
  New Posts New Posts RSS Feed - need opinions on new horn design
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

need opinions on new horn design

 Post Reply Post Reply Page  <123>
Author
Message
_djk_ View Drop Down
Old Croc
Old Croc


Joined: 23 November 2004
Location: United States
Status: Offline
Points: 6002
Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 23 April 2005 at 7:28pm
djk
Back to Top
Sencesync View Drop Down
Registered User
Registered User


Joined: 17 April 2005
Location: United States
Status: Offline
Points: 180
Post Options Post Options   Thanks (0) Thanks(0)   Quote Sencesync Quote  Post ReplyReply Direct Link To This Post Posted: 24 April 2005 at 3:13pm

ok thats diffrent, how the hell do i work this thing?

well here leme rephrase that. im in the states so most of these things its asking for, ive rarly ever seen. only thing i reconize on there is BL.

i might as well make a prototype box out of MDF and do a temp seal with a 18NW100, i have 2 nearly full sheets, i should be able to make one box. and no i wont be building the true ones out of MDF. was thinking of using either 7ply void free maple (3/4") or 5ply void free maple/birch (3/4") whitch one should i use?



Edited by Sencesync
Back to Top
JJones View Drop Down
Registered User
Registered User


Joined: 29 March 2005
Location: United States
Status: Offline
Points: 20
Post Options Post Options   Thanks (0) Thanks(0)   Quote JJones Quote  Post ReplyReply Direct Link To This Post Posted: 25 April 2005 at 8:44am

What you need are T/S numbers for the driver you are using.  That's all the data in the lower sections.  If your not sure about what they are, you should go to the FAQ section on this sight.  There is a pretty good explenation of them.

The next thing you'll need is to take the measures off your drawing.  If you check the "hornresp" help, it gives a pretty good explenation of each of the horn areas.  Play with it a little bit and it'll start making sense.

If you run into anything that doesn't make sense, hit me here or e-mail me directly.

Jim

What?????
Back to Top
JJones View Drop Down
Registered User
Registered User


Joined: 29 March 2005
Location: United States
Status: Offline
Points: 20
Post Options Post Options   Thanks (0) Thanks(0)   Quote JJones Quote  Post ReplyReply Direct Link To This Post Posted: 25 April 2005 at 1:18pm

To answer the wood question,,,  Check the edges!  I'm working with 7ply maple and one sheet was pretty bad on one edge.   It's convinced me to fiberglass the edges to ensure that it won't de-laminate.   IMO, I think the 7ply is the right answer.

The "right" wood is much tooooo expensive here in the states.  13ply would keep my project on hold for a very long time.

I ran the numbers (as best I can make out, You'll be able to tweak them from here) on "hornresp" at lunch.  Give me a shout and I'll send the plots to you.

Jim



Edited by JJones
What?????
Back to Top
Sencesync View Drop Down
Registered User
Registered User


Joined: 17 April 2005
Location: United States
Status: Offline
Points: 180
Post Options Post Options   Thanks (0) Thanks(0)   Quote Sencesync Quote  Post ReplyReply Direct Link To This Post Posted: 25 April 2005 at 7:25pm
im giving a shout, the woofer im using for this horn is the B&C 18NW100. you can find most if not all its TS stuff at http://www.usspeaker.com/homepage.htm under 18" woofers. im looking to get somewhere from 40-50 hz at high DB. and if you can, try to make the folds smooth like i have, but at the same time as basic as possible. i dont really have all the tools neccessary, like dadowing, i cant do that, its all glue and screws. and id like to keep the same basic outside shape of the box if possible
Back to Top
JJones View Drop Down
Registered User
Registered User


Joined: 29 March 2005
Location: United States
Status: Offline
Points: 20
Post Options Post Options   Thanks (0) Thanks(0)   Quote JJones Quote  Post ReplyReply Direct Link To This Post Posted: 26 April 2005 at 9:01am

OK,,, Can anyone tell me how to do a screen print on the thread?

Sencesync,  What you have doesn't look that bad.  I would guess you can get what you want out of it by "tweeking" the front and rear chambers and adjusting the mouth size and horn length.  When it's all said and done, it's a matter of what you're willing to compromise on.  Also remember that I'm working from your drawing with some "assumptions" on chamber size and horn length.  You may have a different view.  It's your drawing.

And don't forget, I'm a Newbie too!

Jim

What?????
Back to Top
Sencesync View Drop Down
Registered User
Registered User


Joined: 17 April 2005
Location: United States
Status: Offline
Points: 180
Post Options Post Options   Thanks (0) Thanks(0)   Quote Sencesync Quote  Post ReplyReply Direct Link To This Post Posted: 26 April 2005 at 7:47pm
if you need, i can personaly send you the pics. it has all the measures there. its just the measurements for the pieces and the horn areas are on that somewhat fuzzy pic. those are all the measurements, you just have to match up letters is all. so if youd like i can send them to you?
Back to Top
tendril View Drop Down
Registered User
Registered User


Joined: 22 July 2004
Status: Offline
Points: 334
Post Options Post Options   Thanks (0) Thanks(0)   Quote tendril Quote  Post ReplyReply Direct Link To This Post Posted: 27 April 2005 at 6:26pm
Originally posted by JJones JJones wrote:

The "right" wood is much tooooo expensive here in the states.  13ply would keep my project on hold for a very long time.


How much are you being quoted for 13lam 18mm birch in the states?

I am paying 45quid ($85ish) which I know is not the best price (still, not the worst either)
Tendril

A mistake is a mistake only if one learns nothing from it.
Back to Top
Sencesync View Drop Down
Registered User
Registered User


Joined: 17 April 2005
Location: United States
Status: Offline
Points: 180
Post Options Post Options   Thanks (0) Thanks(0)   Quote Sencesync Quote  Post ReplyReply Direct Link To This Post Posted: 27 April 2005 at 8:31pm
hah, quoted for? i cant even find a place to buy it from here. i live in Western Washington, and and its strange to know that you cant find a place that sells it. the best i can find is 7ply void free maple

Edited by Sencesync
Back to Top
LunchieTey View Drop Down
Young Croc
Young Croc
Avatar

Joined: 06 February 2005
Location: Australia
Status: Offline
Points: 934
Post Options Post Options   Thanks (0) Thanks(0)   Quote LunchieTey Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2005 at 6:55am
I couldn't find anything in West Australia either until I looked under timber wholesalers in the phonebook and rang a few,the timber retailers sell crap wood full of voids. I even found a salvage yard with 18mm 11 ply with veneer for $60au a sheet. Quite a few of the wholesalers are quite happy to sell it direct to public in single sheet quantities
Speaker addict
Back to Top
_djk_ View Drop Down
Old Croc
Old Croc


Joined: 23 November 2004
Location: United States
Status: Offline
Points: 6002
Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 29 April 2005 at 8:14pm

"i live in Western Washington"

The word is 'appleply', its made in Washington and I get 1" 20 ply (18 cores of poplar and alder plus 2 veneer faces of maple) 4X8 sheets for about $80.

http://www.statesind.com/prod/ind_2a2.html

3/4" Baltic Birch runs about $55 but is only 5X5

djk
Back to Top
Sencesync View Drop Down
Registered User
Registered User


Joined: 17 April 2005
Location: United States
Status: Offline
Points: 180
Post Options Post Options   Thanks (0) Thanks(0)   Quote Sencesync Quote  Post ReplyReply Direct Link To This Post Posted: 29 April 2005 at 8:43pm
  id rather use void free 7ply maple. that is ment for furniture and is soft wood. not only that all my designs and builds are bassed off of a 3/4" wood, not 1". i do see that they are 18ply, but im really not wanting the extra veneer. the boxes are carpeted and painted so theres no point.
Back to Top
 Post Reply Post Reply Page  <123>

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.06
Copyright ©2001-2023 Web Wiz Ltd.

This page was generated in 0.094 seconds.