Do I go with the t39 or t48

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Votandrums
Posts: 11
Joined: Tue Sep 25, 2018 4:56 pm

Do I go with the t39 or t48

#1 Post by Votandrums » Thu Mar 28, 2019 10:56 pm

Ok I searched and couldn't exactly find what I'm looking for. My rig will be used for live sound for a cover band. We play 70's and 80's rock with a little country every now and again. I've seen tons of people reccomend the t39 for this application and mostly because of pack space. That is not an issue in my situation because we have a race car trailer that we'll be using to haul the pa. With that said should I build the t39 or t48. Ive researched and have found that I can get the eminence kappalite 3012lf and 3015lf for the same price. I have a stack of 1/2 plywood that'll be perfect for any build. So my question stands. Is there any difference as to why most choose the t39 over the t48 for this application other than size and maybe cost. I'll be building 4 OT12's as tops for this rig.

Bruce Weldy
Posts: 7208
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Do I go with the t39 or t48

#2 Post by Bruce Weldy » Fri Mar 29, 2019 12:51 am

Votandrums wrote:
Thu Mar 28, 2019 10:56 pm
Ok I searched and couldn't exactly find what I'm looking for. My rig will be used for live sound for a cover band. We play 70's and 80's rock with a little country every now and again. I've seen tons of people reccomend the t39 for this application and mostly because of pack space. That is not an issue in my situation because we have a race car trailer that we'll be using to haul the pa. With that said should I build the t39 or t48. Ive researched and have found that I can get the eminence kappalite 3012lf and 3015lf for the same price. I have a stack of 1/2 plywood that'll be perfect for any build. So my question stands. Is there any difference as to why most choose the t39 over the t48 for this application other than size and maybe cost. I'll be building 4 OT12's as tops for this rig.
You don't need the extra 5hz of extension from the T48 for live sound. The T39 is much easier to move around regardless of whether you have the pack space. I've used 'em for live sound for several years. I helped a friend with his T48s and they are truly a good bit bigger.

As far as the plywood you have laying around - if it's not Baltic Birch or some other plywood with the same thickness of plies - don't use it. Cabinet grade birch with a thin veneer can't handle the internal stress and will come apart. You are going to put a lot of time and effort in this build - make danged sure that you do it with the right stuff. If you aren't sure, post a picture of what you've got and we'll let you know.

I run 4 OTop12s along with up to 6 T39s. It's a great combination for live sound. I have no regrets by going with the T39 over the T48.......and I started with the same questions that you are asking now.

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
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."

Grant Bunter
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Location: Ilfracombe Queensland Australia
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Re: Do I go with the t39 or t48

#3 Post by Grant Bunter » Fri Mar 29, 2019 1:05 am

Hi and welcome.

+1 to what Bruce said.

My only extra comment would be build them wide...
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
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...

Votandrums
Posts: 11
Joined: Tue Sep 25, 2018 4:56 pm

Re: Do I go with the t39 or t48

#4 Post by Votandrums » Fri Mar 29, 2019 6:41 am

Thanks everyone. I'm glad to hear that t39's will work. I just wanted to make sure to get all the output for my money I can. Half the plywood I have is cheap stuff but the other half is sanded pine with 5 equal plys. Really similar to the Auraco ply mentioned in the tips section of the forum.

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Bill Fitzmaurice
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Re: Do I go with the t39 or t48

#5 Post by Bill Fitzmaurice » Fri Mar 29, 2019 6:58 am

T48 will go louder as the 3015LF has more Vd than 3012LF. If pack space is not a concern and getting the most bang for the buck is I'd do T48. You can use the cheap plywood for braces but don't use it anywhere else.

ACUA
Posts: 354
Joined: Sun Sep 25, 2016 6:21 pm

Re: Do I go with the t39 or t48

#6 Post by ACUA » Fri Mar 29, 2019 11:38 am

+1
Advanced concepts underground audio

NukePooch
Posts: 352
Joined: Mon Jun 30, 2014 8:07 pm
Location: Berea, Kentucky

Re: Do I go with the t39 or t48

#7 Post by NukePooch » Sun Apr 07, 2019 7:15 am

Bill Fitzmaurice wrote:
Fri Mar 29, 2019 6:58 am
If pack space is not a concern and getting the most bang for the buck is I'd do T48.
Bruce Weldy wrote:
Fri Mar 29, 2019 12:51 am
I helped a friend with his T48s and they are truly a good bit bigger.
I've got T48s and they are, indeed, massive. I often end up playing electronic music with stupid-low bass lines at gigs so I chose to deal with the bigger cabs. Whichever you go with, put wheels on them (you've already got the trailer with a ramp covered :D ). They're not heavy (compared to store-bought subs) but it sure is easy to just walk them in.

Also, make sure you budget for the processing along with the amp. Get a dbx Driverack, if you don't already have one.
Built:
4 Jack 112L- 3012HO, melded array
17.5 wide AutoTuba with Infinity 860w
6 Wedgehorn W6 w/ Panel Mount Piezos
2 T48 Slims (15" wide) with 3012LF
4 T48 Fattys (32" wide) with 3015LF

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