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My first 186 build, A/B test with Earthquake B36

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RemyK View Drop Down
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    Posted: 03 May 2016 at 11:39am
Hello,
 
I started with the building of the 186 loudspeaker cabinet.
Calculating the wood package and let saw.
Today started drawing on the side plate.
 
This is a test case, so therefore I make this copy in MDF and not in plywood
I want him in A/B test compare with the Earthquake B36 I previously have built.
(pictures from the Earthquake B36 in this post below)
 
I have bought this speaker: RCF lf18g401
http://www.rcf.it/products/precision-transducers/low-frequency-transducers/lf18g401
 
I also like to buy the same speaker inside the 186 cabinet I am now building.
I see the 1850 cabinet is the same, only different chamber size.
Is there anyone ho can help me with fine tuning the chamber for my speaker ?
I think I have to adjust just 1 panel to make the chamber bigger or smaller
(just like the difference for 1850 and 186 cabinet)
I like simulation plots Wink, what will be the tuning frequency?
 
Of course I will post photos of the building

 
Thanks in advance
 
B36 Martijn De Jong
 
 
 
 


Edited by RemyK - 03 May 2016 at 11:57am
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RemyK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RemyK Quote  Post ReplyReply Direct Link To This Post Posted: 04 May 2016 at 12:11am
The drawing is almost done for the panels.
don't know the exact chamber size for my speaker yet,
At this point I need to know the final 'chamber volume panel' placement.
 
still hoping for someone to calculate the exact size for my speaker,
if no one respond, I have to proceed with the normal 186 chamber size i guess.
I think this is also good, buy maybe its just a little better with the exact sizes for my speaker.
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mobiele eenheid Quote  Post ReplyReply Direct Link To This Post Posted: 04 May 2016 at 6:49am
Just use the full chamber, the LF18G401 won´t mind. There´s basically only 2 tunings, the 1850 horn and the 186 horn, any more varieties for a front loaded horn would be over the top imo.

Johan
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Post Options Post Options   Thanks (0) Thanks(0)   Quote all bass Quote  Post ReplyReply Direct Link To This Post Posted: 04 May 2016 at 6:53am
Database simulations

I believe the rear chamber volume formthe 186 is wrong though. It should be bigger than the 1850 horn...
Get your free line array plans here!
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RemyK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RemyK Quote  Post ReplyReply Direct Link To This Post Posted: 04 May 2016 at 3:10pm
Originally posted by all bass all bass wrote:

http://forum.speakerplans.com/-simulation_topic16974. - Database simulations

I believe the rear chamber volume formthe 186 is wrong though. It should be bigger than the 1850 horn...
If i look at the plans the 186 horn chamber is bigger then the 1850 horn chamber !
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RemyK Quote  Post ReplyReply Direct Link To This Post Posted: 04 May 2016 at 10:25pm
Day 2 :
 
I use screws 4x45 mm for the main panel connections. 
first 4mm drill and then pre-drill 2,5 mm in the panel I want to connect.
to flush the screws i use a 7mm drill, just a few mm in the panel.
glue is: Bison professional houtlijm extra (water bestendig)
 


Edited by RemyK - 04 May 2016 at 10:35pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote VECTORDJ Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2016 at 5:35pm
More! More!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RemyK Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2016 at 7:20pm
Day 2 :
lol, maybe a little bit over the top with the Glue clamps (last picture) 
 
 
 
 
 
 
 


Edited by RemyK - 05 May 2016 at 7:24pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote all bass Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2016 at 7:24pm
Good job on this build. Keep those pics coming!

Not enough proper build threads here lately.
Get your free line array plans here!
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RemyK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RemyK Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2016 at 7:27pm
Originally posted by all bass all bass wrote:

Good job on this build. Keep those pics coming!

Not enough proper build threads here lately.
 
This is my second speaker build ever. (first one also in this post)
Not in the wood sector what so ever.
I'm learning as i go....
 
question for tomorrow,
do I have to make any bracing in or around the chamber?


Edited by RemyK - 05 May 2016 at 7:29pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RemyK Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2016 at 10:52pm
Today not much work on de cabinet !
I have to wait for the glue to dry ....
Maybe I have to buy some more glue clamps to work quicker...
 
 
 
 
 
 
 
 
 
 
 


Edited by RemyK - 06 May 2016 at 10:53pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote corell Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2016 at 3:56am
save that t nuts with anything (glue or tacker clips), its a pain to get the chassis out if they get lose someday..
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