AutoTuba 14" wide 8" driver

Post your build odyssey here.
Message
Author
jimbo7
Posts: 849
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

AutoTuba 14" wide 8" driver

#1 Post by jimbo7 »

So far this build has been going good with only a few minor hiccups. I'm trying to recycle as much scraps as possible to keep the cost of this build down since it's going in my gf's car (luck her). My skills are improving with each one of these builds (minus the SLA's, but that's cus I can't math good). I also learned a new trick or two.

Here's panel 1 glued, screwed and nailed
Image

Squeeze-out was so pretty I had to take a pic. Perfect line of squeeze on both sides. Kind of a unicorn for me.
Image

This is where I had an epihany. Why not use the packaging the drive came in as your template? After finding center on the baffle and cardboard, lined it up and drew my circle. Then cut inside the line for safety and then you got a baffle. Also my first build that I cut the baffle with a jigsaw and not a router. Way faster and looked almost as good. Just need a jigsaw that blows away the dust for you :roll: That's the MCM 8" I'm using.
BTW, whenever I'm finding center, I keeping thinking it looks like the start of a Dead Kennedy's logo. I use to draw them a lot in school.
Image

Driver mounted to baffle and what happens? Baffle slap. So I had to trim about a 1/16" all the way around. That ring is what I cut out. I got some skills :fruit:
I'm liking the new retention blocks a lot better than t-nuts or hurricanes. F that.
Image

Another thing I learned for cutting the angles a lot easier, is to place the panel on side panel pencil lines it corresponds to and make a mark to find the needed angle. Connect the dots on the width and down the length and you'll not only know exactly where you need to set your saw, but also the correct way so you don't cut it backwards. Panel 1 angle cuts are dead on as to the layout. I hope this lucky streak keeps going.
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods
2x T39 24" 3012lf
Simplex 10 BP102

jimbo7
Posts: 849
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: AutoTuba 14" wide 8" driver

#2 Post by jimbo7 »

Panel 2 is glued and the driver is being broken in as we speak
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods
2x T39 24" 3012lf
Simplex 10 BP102

User avatar
Tom Smit
Posts: 7457
Joined: Sat Jan 05, 2008 1:24 pm
Location: Sarnia, Ont. Canada

Re: AutoTuba 14" wide 8" driver

#3 Post by Tom Smit »

I wouldn't call it a "lucky streak". I would call it "new found skills" :clap:
TomS

User avatar
DJPhatman
Posts: 5412
Joined: Mon Aug 14, 2006 5:08 am
Location: Warren, MI
Contact:

Re: AutoTuba 14" wide 8" driver

#4 Post by DJPhatman »

Tom Smit wrote:I wouldn't call it a "lucky streak". I would call it "new found skills" :clap:
+1 The more you do, the better you get at it.

Looking good from here! :hyper:
I know money often seals the deal, but seriously, quality is an investment, not an expense... Grant Bunter
Accept the fact that airtight and well-braced are more important than pretty on the inside. Bill Fitzmaurice

Bruce Weldy
Posts: 8301
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: AutoTuba 14" wide 8" driver

#5 Post by Bruce Weldy »

DJPhatman wrote:
Tom Smit wrote:I wouldn't call it a "lucky streak". I would call it "new found skills" :clap:
+1 The more you do, the better you get at it.

Looking good from here! :hyper:

And while we're throwing around cliches...

The harder you work, the luckier you get.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

jimbo7
Posts: 849
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: AutoTuba 14" wide 8" driver

#6 Post by jimbo7 »

Panel 3 installed. Surprisingly my circular saw goes to 51.5 degrees, so it needed minimal sanding.

Image
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods
2x T39 24" 3012lf
Simplex 10 BP102

User avatar
MTB goat
Posts: 52
Joined: Mon Jun 09, 2014 6:06 pm
Location: Southern CA

Re: AutoTuba 14" wide 8" driver

#7 Post by MTB goat »

looking good!

hey do you have a build thread for your SLAs ?

Ryan Sober
Posts: 204
Joined: Sat Feb 01, 2014 8:34 pm
Location: Birmingham, AL

Re: AutoTuba 14" wide 8" driver

#8 Post by Ryan Sober »

Looking awesome! I'm doing a 2x8" AT for my wife's Nitro... can't wait to get started.

jimbo7
Posts: 849
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: AutoTuba 14" wide 8" driver

#9 Post by jimbo7 »

MTB goat wrote:looking good!

hey do you have a build thread for your SLAs ?
http://www.billfitzmaurice.info/forum/v ... 7&start=15

FYI if you use different size drivers, measure like 50x so you don't have to keep buying wood cus you screwed up
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods
2x T39 24" 3012lf
Simplex 10 BP102

jimbo7
Posts: 849
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: AutoTuba 14" wide 8" driver

#10 Post by jimbo7 »

So I'm finished with the build :hyper: But there's one problem, I'm getting some bad vibrations on panel 7. At about 35hz on up it rattles quite loudly at 10v. If I place my hand on it it stops. I added extra brads and screws and it's still vibrating. Could it be panel 3?
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods
2x T39 24" 3012lf
Simplex 10 BP102

User avatar
Bill Fitzmaurice
Site Admin
Posts: 28619
Joined: Tue May 02, 2006 5:59 pm

Re: AutoTuba 14" wide 8" driver

#11 Post by Bill Fitzmaurice »

jimbo7 wrote:I'm getting some bad vibrations on panel 7. If I place my hand on it it stops. I added extra brads and screws and it's still vibrating. Could it be panel 3?
It could be a bad joint between the 3/7 brace and panel 3.

jimbo7
Posts: 849
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: AutoTuba 14" wide 8" driver

#12 Post by jimbo7 »

you think shooting brads from inside the driver chamber might fix it?
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods
2x T39 24" 3012lf
Simplex 10 BP102

User avatar
Bill Fitzmaurice
Site Admin
Posts: 28619
Joined: Tue May 02, 2006 5:59 pm

Re: AutoTuba 14" wide 8" driver

#13 Post by Bill Fitzmaurice »

Brads aren't going to pull a loose brace tight. You need to use screws.

jimbo7
Posts: 849
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: AutoTuba 14" wide 8" driver

#14 Post by jimbo7 »

Hmmmmmm. Not gonna be easy in such a tight space
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods
2x T39 24" 3012lf
Simplex 10 BP102

jimbo7
Posts: 849
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: AutoTuba 14" wide 8" driver

#15 Post by jimbo7 »

Update:
Finally got a chance to fix the vibrating 3/7 brace. Put 3 screw from the inside of the driver chamber to shut it up. No more rattles now :fingers:
Thanks to this little tool, life was much easier. Just took a while when you can only turn it a 1/8-1/4 turn at a time.

http://www.harborfreight.com/media/cata ... _13648.jpg

best $3 I've spent

I put the box in my car to test it out, and HOLY JESUS is it loud! Way too much for my needs. At 20v my headliner wanted to come off.
Sounded really good inside the house, too. Might have to make more of these since it's 1/2 the weight and size of my t24.
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods
2x T39 24" 3012lf
Simplex 10 BP102

Post Reply