2x Tuba 30 Build (First Build)

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jdthorpe
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Re: 2x Tuba 30 Build (First Build)

#16 Post by jdthorpe » Sat Sep 07, 2019 12:59 pm

Thanks again for the recent posts/advice guys. It was a rough week at work so I’m just seeing the posts from a few days ago.

Out of curiosity, how many “handles” did you guys cut or install on your Tuba 30s? I’m going 24” wide so I’ve cut 2 handles (one on each side of the panels rather than one in the middle) for easier handling for one person. But, I think I went a little nuts and cut the two handles on the panel 7/8 junction, 8/10 junction, and 10/12 junction. I’ve seen other people do that many handles and Bill’s 3-D designs show that many handles as an option as well but I’m wondering how professional my Tubas are going to look with that many handles on them. I know it will make my job easier when I have to carry them around but I want them to look good as well. It doesn’t matter at this point because they’re already cut and that’s how it’s going to be, but I was just curious how many handles you guys cut into your Tubas and how good it looks.

jdthorpe
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Re: 2x Tuba 30 Build (First Build)

#17 Post by jdthorpe » Sat Sep 07, 2019 1:14 pm

Also, so I understand, why do we use speakon connectors instead of XLR connectors with the subwoofer builds? Are they a more high quality, professional connector or is it a cost/benefits thing? I just ask out of curiosity because a lot of the “professional” powered/active dj subwoofers that you can buy have XLR connectors. Thanks again.
-Jeff

SethRocksYou
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Re: 2x Tuba 30 Build (First Build)

#18 Post by SethRocksYou » Sat Sep 07, 2019 1:59 pm

Hey Jeff, I'm Seth. I'm enjoying your thread. Thanks for taking me along your journey with you.

XLR connectors are for line level/low power connections. Between microphones and a mixer, between a mixer and signal processor (EQ, Crosover, etc.)... and as you mentioned, they're also used to supply a signal to powered speakers (the amplifier is built into the speaker), or in our case XLR connections to an traditional outboard amplifier. The speakON connectors are use for high power connections post amplification.

Line level/low power signal before the amplifier = XLR
High power after the amplifier = speakON

jdthorpe
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Re: 2x Tuba 30 Build (First Build)

#19 Post by jdthorpe » Sat Sep 07, 2019 2:10 pm

SethRocksYou wrote:
Sat Sep 07, 2019 1:59 pm
Hey Jeff, I'm Seth. I'm enjoying your build thread. Thanks for taking me along your journey with you.

XLR connectors are for line level/low power connections. Between microphones and a mixer, between a mixer and signal processor (EQ, Crosover, etc.)... and as you mentioned, they're also used to supply a signal to powered speakers (the amplifier is built into the speaker), or in our case XLR connections to an traditional outboard amplifier. The speakON connectors are use for high power connections post amplification.

Line level/low power signal before the amplifier = XLR
High power after the amplifier = speakON
Thanks SethRocks! That totally makes sense. Obviously inside the active subwoofer enclosure there are speakon-type high power connectors/cables running from the internal amplifier to the drivers. Sorry, total newbie question...lol

One of these days I’ll get some photos uploaded. It always makes it more interesting when you can see exactly how the different forum members go about their builds. I don’t have a nice shop like some guys, but I have some decent power tools that make life easier with these types of projects. I just feel like I need to hurry up and get these done! I know, I know, I need to take my time and do it right the first time and not be in a rush.

himhimself
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Re: 2x Tuba 30 Build (First Build)

#20 Post by himhimself » Sat Sep 07, 2019 2:23 pm

I have a pair of 20" wide T30s and put a single centered handle at 8/10 and 10/12. I purposely did not put a handle on the front at 7/8 because I thought it might look weird. I may still cut one in, or maybe just attach a some kind of small lip that would make it easier when reaching up there to rock the cabinet back onto its wheels (on either side of the handle at 10/12). Once they are back on the wheels, the single handle at 8/10 is fine for steering them around.
2xT30 (20", 3012lf)
4xOtop Jarray

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Re: 2x Tuba 30 Build (First Build)

#21 Post by SethRocksYou » Sat Sep 07, 2019 2:41 pm

jdthorpe wrote:
Sat Sep 07, 2019 2:10 pm
Obviously inside the active subwoofer enclosure there are speakon-type high power connectors/cables running from the internal amplifier to the drivers.
There's not likely to be speakON connectors in a somewhat permanent application that doesn't require regular connecting and disconnecting. Such as inside a powered speaker, where the only time the wires would need to be disconnected between the amp and driver would be if it needed service or replacement, which may never occur. Appropriate cabling? Yes, but you're likely to see crimp on spade connections to drivers in most cases.

jdthorpe
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Re: 2x Tuba 30 Build (First Build)

#22 Post by jdthorpe » Sat Sep 07, 2019 3:53 pm

SethRocksYou wrote:
Sat Sep 07, 2019 2:41 pm
jdthorpe wrote:
Sat Sep 07, 2019 2:10 pm
Obviously inside the active subwoofer enclosure there are speakon-type high power connectors/cables running from the internal amplifier to the drivers.
There's not likely to be speakON connectors in a somewhat permanent application that doesn't require regular connecting and disconnecting. Such as inside a powered speaker, where the only time the wires would need to be disconnected between the amp and driver would be if it needed service or replacement, which may never occur. Appropriate cabling? Yes, but you're likely to see crimp on spade connections to drivers in most cases.
Gotcha!

jdthorpe
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Re: 2x Tuba 30 Build (First Build)

#23 Post by jdthorpe » Tue Sep 10, 2019 3:27 pm

Just to clarify (the plans aren’t very specific on this)... when I mount my driver to the baffle I do not ”drop” the driver through the hole and screw it down that way, instead the driver is placed flush to the face of the baffle and screwed in? Hopefully that makes sense. I was actually thinking it was done the other way (by lowering the back part of the driver through the hole and screwing it on that way) so I was confused as to why the mounting hall was supposed to be cut 1/8” smaller than the inside diameter of the driver mounting gasket.

Grant Bunter
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Re: 2x Tuba 30 Build (First Build)

#24 Post by Grant Bunter » Tue Sep 10, 2019 3:43 pm

As long as you cut the baffle size correctly, you're on the money, place the driver over the hole and screw it down.

Think about it for a second, the horn throat and mouth isn't sufficiently deep enough to allow the driver to be put in the other way...
Built:
DR 250: x 2 (melded array) with March 2012 plans. 2 more under way with CD horn
T39's: 4 x 20" BP102 , 2 x 28" 3012lf.
WH8: x 3 with melded array.
Bunter's Audio and Lighting "like"s would be most appreciated...

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Bill Fitzmaurice
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Re: 2x Tuba 30 Build (First Build)

#25 Post by Bill Fitzmaurice » Tue Sep 10, 2019 3:49 pm

jdthorpe wrote:
Tue Sep 10, 2019 3:27 pm
Just to clarify (the plans aren’t very specific on this)...
The Sketchup is. :bash:

jdthorpe
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Re: 2x Tuba 30 Build (First Build)

#26 Post by jdthorpe » Tue Sep 10, 2019 4:32 pm

Thanks guys. Yep, Bill you’re right...it’s right there in the sketchup! The funny thing is, I have been looking at the sketchup on a regular basis and studying it but this time I did not think to look at it...aaarrrggghhh!

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