'Jubilo' 3 way active loudspeakers, construction diary

37447 Views 67 Replies 20 Participants Last post by Wooderson, Aug 26, 2015

Zeverin

Discussion Starter · Sep 7, 2010

Hello everybody.

I plan to share with you the construction of my new loudspeakers called 'Jubilo'.

Some time ago, I asked for some advices and opinions, which you can see here:

http://www.hometheatershack.com/for...ice-needed-build-new-3-way-active-system.html

Please forget the cabinet model presented there.

I started the construction of the loudspeakers back in January so in the first posts I will update the construction progress up to is current status. After that you might expect slow updates.

The drivers are:
Tweeter: Seas 27TBFC/G
Mid: 18Sound 6ND430
Woofer: Dayton RS270

The loudspeaker will be made of to separate cabinets. One with to woofers, and another on top in MTM configuration. The cabinets will be placed very closed together, so that the final format will be WWMTM.

Why two cabinets? well, first it will allow to place the mids and tweeters in a less smaller baffle, reducing baffle difraction. Second in the future I will be able to change the cabinets indenpendently of each others.

The crossovers remains the DCX2496. The amplifiers maybe A500 also from behringer. I still don't have one solution for the 6-ch volume controller

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Zeverin

Discussion Starter · #2 · Sep 7, 2010

5

Since I wanted the cabinets to be curved, I needed to use a CNC that I was able to find neer the place I live. This pictures were taken in 2009-12-28.

Transport Machine Wood

Wood Floor Hardwood Machine tool Machine

Table Wood Furniture Plywood Architecture

Wood Plywood Hardwood Table Furniture

Wood Plywood Hardwood Table Lumber

In the last two pictures is possible to understand the final shape of the enclousure.

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Zeverin

Discussion Starter · #3 · Sep 7, 2010 (Edited)

2

It took a few days after to bought the adicional wood. I needed wood for the internal bracing, for the front baffles and back of the box, soo I used 19 mm MDF (3/4"). I also needed to create that curved side wall of the loudspeaker. Insted of cutting lots of pieces with the shape wanted with the CNC and stack all them on top of each other, i.e., several layers ($$$ being the reason not to do it), I used MDF with 3 mm (1/8") in the side walls, using 6 layers. Pictures will show better this technique.

First the pieces of the internal bracing (2010-01-17):

Design Auto part Plastic Metal

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Zeverin

Discussion Starter · #4 · Sep 7, 2010

I just love to cut wood :bigsmile:
2010-01-23

Architecture Scale model

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Zeverin

Discussion Starter · #5 · Sep 7, 2010

6

First pieces put together:

(2010-01-25)

Workbench Tool Table woodworking Clamp

(2010-01-27)

Wood Workbench Tool

Plywood Architecture Stairs Wood Shelf

Table Furniture Plywood

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robbo266317

· #6 · Sep 7, 2010

You are lucky to have access to a cnc machine. I had to make up jigs for my router when I built mine.
It's looking good so far, will you be using ply for the sides?

ironglen

· #7 · Sep 7, 2010

I think he's going to using multiple layers of thin wood glued on top of one another so he can curve each one. Definitely shows the beginnings of a nice cabinet.

Zeverin

Discussion Starter · #8 · Sep 8, 2010

Hi. Iroglen is correct. I'm going to use 6 layers of thin MDF 1/8" (3 mm) to be exact, so no ply here. I will post some photos soon.

It is nice to have access to a CNC, but that ain't cheap. I had paid 125€ just to cut the curved pieces in the first photos. But it was worth it.

Zeverin

Discussion Starter · #9 · Sep 8, 2010

3

Internal bracing of the bottom boxes completed in 2010-02-01

Furniture Table Wood woodworking Desk

Furniture Table Chair Desk Wood

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Zeverin

Discussion Starter · #10 · Sep 8, 2010

6

A month latter I finished the internal bracing of the top box, I had been busy with other stuff. 2010-04-14

Table Furniture Chair Room Wood

Hearth Masonry oven Fireplace Concrete

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Zeverin

Discussion Starter · #11 · Sep 8, 2010

2

Here you can see the side wall 1/8" MDF pieces (3mm). A lot of them :yikes::dumbcrazy:
48 pieces to be exact. 2010-04-17

Wood Hardwood Wood stain Plywood Furniture

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Zeverin

Discussion Starter · #12 · Sep 8, 2010

12

2010-04-18 was a great day. It was the day that I had glued the first side wall piece to the internal structure. I was very anxious to see how it would work.
I had glued the first pieces with a friend of mine. It took one 1:15h to get the first piece glued. :flex:

But when I looked how it resulted, I was very pleased. After that we got more confident in our work and managed to glue the pieces faster.

Wood Furniture Chair Room Wood stain

Musical instrument Drum Bass drum

Architecture House

Some mistakes occured also. To tight :yikes::doh:

Electrical wiring Wire Electrical supply Wood

We learn from the mistakes, right?

But we moved on...:sweat:

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Zeverin

Discussion Starter · #13 · Sep 9, 2010

4

Some more fotos of the gluing process. 2010-04-25

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terry j

· #14 · Sep 9, 2010

seem to be a lot of bees in your area:rofl:

keep the pics coming, nice

Zeverin

Discussion Starter · #15 · Sep 9, 2010

terry j said:
seem to be a lot of bees in your area:rofl:

ROTFL. :rofl:

Great joke terry :laugh:

More photos coming soon

robbo266317

· #16 · Sep 9, 2010

They are really taking shape now, I love those tie-down straps!
Is the glue you are using the same as what we call "Aquadhere"? here in Oz.

Ebay has some cheap bee suits available if you need them.

Zeverin

Discussion Starter · #17 · Sep 9, 2010

2

Finally in 2010-06-27 I was able to glue the last side wall piece. It was a long way... :rubeyes:

Wall Room House Plaster Architecture

Sculptor Wood Sculpture Plaster Gas

I believe the glues are very similar. I use the glue from UHU, a German company, very easy to work with and astonishing strength.

Better checkout those suits at Ebay, never know if the bees are coming back again. :neener:

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robbo266317

· #18 · Sep 9, 2010 (Edited)

Zeverin said:
Finally in 2010-06-27 I was able to glue the last side wall piece. It was a long way... :rubeyes:

I believe the glues are very similar. I use the glue from UHU, a German company, very easy to work with and astonishing strength.

Better checkout those suits at Ebay, never know if the bees are coming back again. :neener:

Don't worry about the bees... I'd be more worried about the black hole forming near his face. :rofl:

Zeverin

Discussion Starter · #19 · Sep 10, 2010

robbo266317 said:
Don't worry about the bees... I'd be more worried about the black hole forming near his face. :rofl:

:rofl::rofl:You made my day. By the way that is me in the picture.

Zeverin

Discussion Starter · #20 · Sep 10, 2010 (Edited)

4

2010-07-11. Preparing to cut the holes in the front baffle, and started to round the edges in the back panel.

Wood Plywood Circle Table Wood stain

Automotive exterior Bumper Vehicle door Auto part

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