Official Luthiers Forum!

Solely owned and operated by Lance Kragenbrink
It is currently Sun Sep 22, 2019 2:45 am


All times are UTC - 5 hours





Post new topic Reply to topic  [ 7 posts ] 
Author Message
 Post subject: Speaker cabinet making
PostPosted: Fri Mar 07, 2014 3:51 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri Aug 26, 2005 5:49 pm
Posts: 2907
Location: Norway
I recently had a couple of old Fender amps put back into action ('61 Tremolux, 70’s Quad Reverb). The Quad’s cabinet I'd already chopped down to "Twin" size (back around 1990...), so I cut it down to head size, the Tremolux of course was a head from the factory. So they both needed speaker cabinets, and I decided to build my own, and I took some pictures of the process.
The old Fender cabs were made of ¾” pine with a thin plywood speaker baffle, and many feel that their construction contributes greatly to the old Fender amp’s musical character. I got some pre laminated 18mm pine from the lumber yard, should be pretty much the same thing. In the early (pre CBS) days, their corners were finger jointed, glued with hide glue, and they have proved to be quite robust over time.
Image




I don’t have an industrial size moulder, so I decided to use this old cabinet maker method to produce the joint. By using a simple sled on the table saw...
Image




...with an index pin that is equally thick as the saw kerf...
Image



...and by cutting all the pieces that are going to fit together in one go….
Image




...the pieces should fit perfectly. Even if you accumulate errors along the way, and you will, they will be equal on all the pieces, so they should fit anyways. So it is a good idea to mark the pieces accordingly. A dado set would have made things go faster, I guess
Image




Next step is assembly, and making sure things are nice and square
Image




Finally, a use for my long glue clamps!
Image




Instead of hide glue, I used fish glue, which I find more convenient in situations such as this because of the much longer open time
Image




Close-up
Image




Carcasses done; the smaller one is for 2*10” speakers, the larger one for 2*12”.
Image




Gluing on battens to attach front and back panels
Image




Using a roundover bit in the router to shape the edges
Image



Routing the 10 mm plywood baffle speaker cut-outs with a circle jig
Image




Part of the fun is testing different speakers, I got a few different ones from Warehouse that have gotten good reviews
Image




I also have an array of oldies that I can test them against
Image




Finally! The hardware and things have arrived from a distributor in the England
Image




Tolex, grill cloth, corner protectors etc
Image




Cutting the pieces to size
Image




From my tests, fish glue seems to be a good choice for attaching tolex to wood, but not so good for tolex on tolex, so I ended up CA-gluing those overlaps.
Image




Another issue is that the tolex will slide until the glue sets, so I had to staple and clamp everything well. There are contact glues that are especially made for this that probably are easier to work with, and I’ll probably look into those more if I decide to do this again.
Image




You can never have too many clamps etc...
Image




Even though the corners will be hid by the metal protectors, it is always fun to be neat
Image




Attaching the hardware and baffle...
Image




...and some more hardware
Image




...and we’re done! The tilt back feet seem to work fine
Image




According to the tolex vendor, this fabric was made one the same old machines that made the material that Fender used back in the day. I don’t know if that’s true, but it seems like its color and texture matches that of the ‘61 Tremolux head quite well (minus some honest wear of course…)
Image




I dig the colors!
Image




The other cabinet was more of the same. Cutting...
Image




...glue, staples
Image




The black tolex is thinner, so it moved even more, grrrr...
Image




Keeping things as taut required various clamping arrangements
Image




Fitting the baffle, checking to see how much space to leave for the grill cloth
Image




I picked some wheat colored grill material for this one, the amp ioiginally had the sparkly silver stuff, which I’m not crazy about.
Image




Almost done
Image




Back, with amp (I have since added a proper jack input)
Image




Loaded with Warehouse ET-65 and Retro 30 (I substituted the Retro for a Cannabis Rex later)
Image




Front
Image

_________________
Rian Gitar og Mandolin


Top
 Profile  
 
PostPosted: Fri Mar 07, 2014 9:29 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Mon Feb 19, 2007 12:22 pm
Posts: 131
Location: Mattawan Michigan USA
Arnt-

Thanks for the ideas! I have been contemplating how to best go about building a cabinet for a small tube amp and 10" speaker - those finger joints look like the way to go! Beautiful work! And - I have a black face Tremolux amp - I'm guessing 1965 vintage - missing the hardware to fasten the head to the speaker cabinet. Where did you find the hardware to do this?

Tom

_________________
Tom Barton


Top
 Profile  
 
PostPosted: Sat Mar 08, 2014 11:05 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri Aug 26, 2005 5:49 pm
Posts: 2907
Location: Norway
Tom, glad you found it helpful. I ordered the hardware from http://www.solsound.com/ in England, because they had pretty much everything I needed, and shipping from within Europe is much less than from overseas. Over on your side there are several sources, Mojo Amps is one. Check Ebay, there are many more

_________________
Rian Gitar og Mandolin


Top
 Profile  
 
PostPosted: Sat Mar 08, 2014 2:21 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Mon Feb 19, 2007 12:22 pm
Posts: 131
Location: Mattawan Michigan USA
Arnt -

Thanks!

_________________
Tom Barton


Top
 Profile  
 
PostPosted: Sat Mar 08, 2014 2:52 pm 
Offline
Koa
Koa
User avatar

Joined: Tue Mar 18, 2008 8:43 am
Posts: 775
Location: Florida
First name: John
Last Name: Killin
Focus: Build
Status: Amateur
Nice Job Arnt. I just got done building and Tolexing a couple of Fender Champ size cabs.

I used contact cement for my Tolex and it was really nice to have the material actually stick to the spot where you wanted it rather than having to use the clamps.

I used the same style grill cloth you used on the black one. Really pretty stuff. Thanks for showing this.

John


Top
 Profile  
 
PostPosted: Sat Mar 08, 2014 3:14 pm 
Offline
Koa
Koa

Joined: Sat Apr 19, 2008 10:08 pm
Posts: 1953
Location: Missouri
First name: Patrick
Last Name: Hanna
State: Missouri
Country: USA
Arnt, this is a very interesting thread. I long ago quit trying to use finger joints because I could not do them accurately. Your method of staggering the pieces and sawing all connecting parts in one operation is an excellent solution to that problem. It's a solution that was never pointed out to me until now. It seems so obvious, but things always seem obvious once another person points them out. You have great patience to do the cuts with a single saw kerf rather than a dado set. Of course, your method yields two or three times as much surface area for glue joints, so I suppose that's not a bad thing. Thanks for posting this.
Patrick


Top
 Profile  
 
PostPosted: Sun Mar 09, 2014 10:53 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri May 18, 2012 8:35 pm
Posts: 2410
Location: Austin, Texas
First name: Dan
Last Name: Smith
City: Round Rock
State: TX
Zip/Postal Code: 78681
Country: USA
Focus: Build
Status: Amateur
Very nice work, Arnt!
They match the heads perfectly.
Thanks for posting build pics.
Dan

_________________
wah
Wah-wah-wah-wah
Wah


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
phpBB customization services by 2by2host.com