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Custom 2x12 Guitar Cab


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Hi friends, last Dicember I bought a Line 6 Spider III HD75 Head for a good price and I was using it connected to the speaker of my guitar combo...

Then I had to buy a cab for it or build one... I know that build a cab is not the more exciting thing in the world to do but I love build things so I took the second way.

Last two weekends I was working in it, the specifications are :

- 2x12¨ guitar cab.

- Speakers : 12¨,60W, 8 ohms guitar speakers.

- Mono input : 120W at 4 ohms (speakers in parallel).

- Stereo input : 60W at 8 ohms (per channel).

- Box : 15mm MDF sides, 30mm front, all joined with glue and wood inserts, with wood reinforcements inside.

- Back in three parts, with a center door to use the cab closed or opened.

- Finish : black tolex with metal corners protectors and metal handles.

- Front : wood frame with black cloth grill and aluminum binding.

- Wheels : heavy duty metal/plastic wheels.

Here are the partial results of these days :

Cab020.jpg

Cab021.jpg

Step by step pics :

All the parts cutted :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab001.jpg

The speakers :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab005.jpg

My friend Taz checking my work...

http://i264.photobucket.com/albums/ii186/a...2x12/Cab007.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab010.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab011.jpg

Gluing a mdf strip to add thickness to the front :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab012.jpg

Making the holes for the speakers :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab013.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab017.jpg

During this week I´ll have several free hours to work. More pics soon...

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This is really cool. I have the Spider3 150W head with 4X12 cab. I want to run two 4X12 cabs but I can't find a flat front line 6 cab as it seems they only make a slant cab. Two slants won't work since I need to stack them and I have three small kids and that would be a recipe for disaster. So, I've been contemplating building a second flat faced cab so I can run two cabs in 75 mono per cab.

I also want to change the tolex to a different color on the existing pieces. Likely a snake skin with flat black grills!

Your's looks so good it has me inspired to get started on that project!

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This is really cool. I have the Spider3 150W head with 4X12 cab. I want to run two 4X12 cabs but I can't find a flat front line 6 cab as it seems they only make a slant cab.

This might help:

http://www.line6.com/store/hardware.html?m...p;dealer=online

http://www.instrumentpro.com/P-LINLINE6CAB412-SB.html

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The king of DIY has returned!

I really like it. As always, it's clean clean work.

If you ever put together a schematic/drawing/CAD/PDF of how you went about the construction, don't forget to let us know! I'd like to add it to my collection if possible.

How did you go about making the holes for the speakers perfectly circular? I have seen a few router jigs, like the ones they use to cut soundholes on acoustics.

I've also read a few articles detailing how some manipulate the dimensions of the cabinet to emphasize certain frequencies. I didn't know if you came across this in your readings, or what you thought about it.

Congrats again!

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Thanks Xanthus, I have more pics of each step than I show in the forum, but I don´t want to bore you with them. Could be a good idea to do a detailed PDF with schematics and pics, If I have enough time in the future... I´ll try.

About the holes for the speakers, they are not perfect if you look close enough... :D

I used three tools to make them, the pics shows the order :

First I cut the holes close to the circle line :

Cab014.jpg

Then I sanded the circle to make it almost perfect using this little DIY tool :

Cab015.jpg

Finally I used the router to round the circle :

Cab017.jpg

About the dimensions of the cabinet, I was looking and reading for some weeks. I know that is important the relation between the box, the materials and the speakers... but honestly I just copied the dimensions of an existing design and only make the open/close back modification to play with this feature.

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You decided what speaker you are going to put in there yet?

Yes, there is a local manufacturer that make some really nice guitar speakers. I put one in my guitar combo to test and sounds good. I really don´t know how will be the result with the cab (open or close) and the Spider III, because the HD75 is a modeler amp and the speakers add some colour to the sound but I´ll have to try and tweak the tone controls to my taste. :D

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More progress to report. I completed the box, all is joined, reinforced and waiting for the flat black paint and the finishing.

The results :

Cab032.jpg

Cab041.jpg

More pics :

The inside reinforcements :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab024.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab029.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab030.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab035.jpg

The cab with the front routed :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab026.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab036.jpg

The three parts back :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab028.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab038.jpg

Today I´ll buy the metal corners and handles and I´ll be painting in flat black all the box.

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Couple of questions.

Do you plan to test the cab and speakers with both the open-back and a closed-back?

That plastic jack plate scares me. I love steel cup jack plates. Do you have a source for them? www.partsexpress.com has been good to me for cab building/repairing.

Recessed jack plate and handles? You got a router, you could make it look really clean and professional.

Rhino-liner? Duratex? I've been hella-impressed by the looks AND the durability of both, far superior to Tolex wrapping or just spray-painting, makes the cab watertight which helps when loading in/out in winter and the snow's falling heavy.

Grill cover? Metal grate, cloth, vintage mesh?

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Hi Bryan, your questions are welcome !

Yes, the back will have a door to use it open or close.

For the moment the jack plate will be a plastic one because I want to obtain all the parts locally and I live in Argentina... The jack plate and handles will be recessed.

I´m painting all the box in flat black to seal the MDF and then will be covered with black tolex.

The grill will be black cloth in a wood frame with aluminum binding.

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This build looks very good, can't wait to see it finished.

Are you going to do any porting for closed back use? Also, It doesn't actually really matter if the circles aren't perfect, as long as the speakers fit, since the you will have a grill on the front anyway right?

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The cab is now covered with the black tolex !

Cab053.jpg

Cab052.jpg

Cab050.jpg

First I painted the box with flat black :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab043.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab044.jpg

Then I began with the tolex :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab047.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab048.jpg

Here are the metal corners and handles that I bought :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab039.jpg

Now I have to install them.

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Man, you've got to have some patience to get that tolex perfect. I applaud you for that.

I made a floor box for my PodXT Live, so I wouldn't have to worry about it getting knocked around. I bought a similar material to tolex, and it took me maybe 3 tries with each piece to get it to fit right!

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Man, you've got to have some patience to get that tolex perfect. I applaud you for that.

I made a floor box for my PodXT Live, so I wouldn't have to worry about it getting knocked around. I bought a similar material to tolex, and it took me maybe 3 tries with each piece to get it to fit right!

Thanks Xanthus, you are right, patience is the key for a good job ! :D

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More progress to show, I´ve installed the metal accessories :

Cab061.jpg

Cab062.jpg

Cab063.jpg

When I installed the wheels, I used two longer screws to stop the rotation of the wheels.

The stability of the box is higher in this way.

http://i264.photobucket.com/albums/ii186/a...2x12/Cab056.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab058.jpg

The connections for the speakers :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab066.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab068.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab069.jpg

Now I´m working in the wood frame for the front grill cloth. :D

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Those longer screws won't affect moving it around at all? Now that you can't get the full 360 degree rotation out of them...

Yes you are right, the screws affect the moving around, you only have almost 180 degree rotation. But if you look closely to the wheels you can see that the pivot on which the wheels rotates is not in the centre, and if the rotation is 360 degree and you rotate all the wheels to the centre of the cabinet, the stability of the cab + head is not good enough.

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My cab is finished ! Pics of the back :

Cab073.jpg

Cab075.jpg

More pics :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab089.jpg

http://i264.photobucket.com/albums/ii186/a...2x12/Cab091.jpg

I made the latch of the back door using a little piece of black plastic.

Details of the door´s latch (in opened position) :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab077.jpg

Details of the door´s latch (in closed position) :

http://i264.photobucket.com/albums/ii186/a...2x12/Cab078.jpg

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