Radian's T48 slim build

Post your build odyssey here.
Message
Author
User avatar
Radian
Posts: 2067
Joined: Tue Jul 29, 2008 12:56 pm
Location: Tucson, AZ

Re: Radian's T48 slim build

#61 Post by Radian »

Side glued and screwed down. Technique applied here of holding off installing Panel 11 (mouth reflector) until the day of glueing down the final side panel. This affords some latitude to not only square up the mouth perfectly with clamps, but also allows that panel to "float" a little in its place while it cures, eliminating internal stress.

If there's ANY twist or bend in the mouth area paneling prior to setting down the final side, curing Panel 11 ahead of this schedule has the potential to permanently set that misalignment, no matter how miniscule, and can make squaring up Panel 10 to the side panel difficult at best.
SideCab3.jpg
Good food, good people, good times.

4 - AT
1 - TT
1 - THT Slim
2 - SLA Pro 4x6 Alphalite
1 - T18

User avatar
Radian
Posts: 2067
Joined: Tue Jul 29, 2008 12:56 pm
Location: Tucson, AZ

Re: Radian's T48 slim build

#62 Post by Radian »

Mouth brace installed and curing up.
Mouth3.jpg
Good food, good people, good times.

4 - AT
1 - TT
1 - THT Slim
2 - SLA Pro 4x6 Alphalite
1 - T18

User avatar
Radian
Posts: 2067
Joined: Tue Jul 29, 2008 12:56 pm
Location: Tucson, AZ

Re: Radian's T48 slim build

#63 Post by Radian »

Number 3 cabinetry assembly complete. Onwards to Number 4! :hyper:
Three2.jpg
Good food, good people, good times.

4 - AT
1 - TT
1 - THT Slim
2 - SLA Pro 4x6 Alphalite
1 - T18

User avatar
Radian
Posts: 2067
Joined: Tue Jul 29, 2008 12:56 pm
Location: Tucson, AZ

Re: Radian's T48 slim build

#64 Post by Radian »

It has to be re-stated. The Titans indeed hold up to their namesake. These suckers are large, by any standard, and am solemnly reminded so every time we haul them out for pictures. I'm average height and a T48 stands right up to my chest. They simply dwarf the Klipsch La Scala. :twisted:
Three.jpg
Good food, good people, good times.

4 - AT
1 - TT
1 - THT Slim
2 - SLA Pro 4x6 Alphalite
1 - T18

Joman116
Posts: 59
Joined: Sat Jun 21, 2025 4:40 pm
Location: TX

Re: Radian's T48 slim build

#65 Post by Joman116 »

Radian wrote: Sun Oct 26, 2025 6:28 pm It has to be re-stated. The Titans indeed hold up to their namesake. These suckers are large, by any standard, and am solemnly reminded so every time we haul them out for pictures. I'm average height and a T48 stands right up to my chest. They simply dwarf the Klipsch La Scala. :twisted:Three.jpg
Looking good! What is your use case for these Subs? What drivers are you using?
2x20" Titan 39 loaded with Eminence KAPPALITE 3012F
QSC 1804 Amp
DBA Driverack 260 Speaker Management

User avatar
Radian
Posts: 2067
Joined: Tue Jul 29, 2008 12:56 pm
Location: Tucson, AZ

Re: Radian's T48 slim build

#66 Post by Radian »

Corporate / Boutique audio presentation, using the HL-10C
Good food, good people, good times.

4 - AT
1 - TT
1 - THT Slim
2 - SLA Pro 4x6 Alphalite
1 - T18

User avatar
Rike43
Posts: 13
Joined: Wed Sep 25, 2024 2:16 am

Re: Radian's T48 slim build

#67 Post by Rike43 »

Very impressive work. Good planning pays off!

User avatar
Radian
Posts: 2067
Joined: Tue Jul 29, 2008 12:56 pm
Location: Tucson, AZ

Re: Radian's T48 slim build

#68 Post by Radian »

Well...that only took four years, but the cabinet assembly for this 4-pack is done. :noob: Onwards to finishing millwork, handles, hatches/wiring, first voice, filling/finish sanding, paint, and final assembly.
T48Quad1.jpg

T48Quad2.jpg
Good food, good people, good times.

4 - AT
1 - TT
1 - THT Slim
2 - SLA Pro 4x6 Alphalite
1 - T18

Bruce Weldy
Posts: 8621
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Radian's T48 slim build

#69 Post by Bruce Weldy »

Great job. Love the old plan design.

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."

Joman116
Posts: 59
Joined: Sat Jun 21, 2025 4:40 pm
Location: TX

Re: Radian's T48 slim build

#70 Post by Joman116 »

Radian wrote: Sun Dec 14, 2025 10:43 pm Well...that only took four years, but the cabinet assembly for this 4-pack is done. :noob: Onwards to finishing millwork, handles, hatches/wiring, first voice, filling/finish sanding, paint, and final assembly.

T48Quad1.jpg



T48Quad2.jpg
Looks great

1.) What plywood are you using?

2.) What would you say was the most challenging part so far?

3.) Are you using a circular saw, or a table saw?

In the process of planning me t60 or t45 build and trying to prepare accordingly..
2x20" Titan 39 loaded with Eminence KAPPALITE 3012F
QSC 1804 Amp
DBA Driverack 260 Speaker Management

User avatar
Radian
Posts: 2067
Joined: Tue Jul 29, 2008 12:56 pm
Location: Tucson, AZ

Re: Radian's T48 slim build

#71 Post by Radian »

Thanks Bruce.

@Joman116
The plywood is 15mm 9-ply Baltic Birch.

The most challenging part for me, on this build, has been "time on target." ie. Actually getting my hands on the wood to push the project forward. Life happens, and at this juncture it's been a juggling act to keep priorities in alignment.

The most challenging part of any BF build is being absolutely fussy about the dimensions/placement of the bracing, which starts with a balls-accurate layout. Triple check those layout lines before cutting any wood. Cut the wood only to the layout lines from that point forward. Source the bracing dimensions from those layout lines, then "loft" them up squarely into position along the width of the cab. From that point, the bracing will either hold everything into alignment, or push everything out of whack. 1/16th of an inch here or there is all it takes to really get the other panels out of sorts.

I currently use a track saw system (shown on Page 1 of thread), which has been an exercise in compromise. I don't have my own shop. Just the garage which we primarily use for the cars, so no space for a table saw, which would be lovely for projects like this. When fabrication requires something fancy, I hit up the local maker-space downtown which has dumb-near everything.
Good food, good people, good times.

4 - AT
1 - TT
1 - THT Slim
2 - SLA Pro 4x6 Alphalite
1 - T18

Joman116
Posts: 59
Joined: Sat Jun 21, 2025 4:40 pm
Location: TX

Re: Radian's T48 slim build

#72 Post by Joman116 »

Radian wrote: Tue Dec 16, 2025 9:30 am Thanks Bruce.

@Joman116
The plywood is 15mm 9-ply Baltic Birch.

The most challenging part for me, on this build, has been "time on target." ie. Actually getting my hands on the wood to push the project forward. Life happens, and at this juncture it's been a juggling act to keep priorities in alignment.

The most challenging part of any BF build is being absolutely fussy about the dimensions/placement of the bracing, which starts with a balls-accurate layout. Triple check those layout lines before cutting any wood. Cut the wood only to the layout lines from that point forward. Source the bracing dimensions from those layout lines, then "loft" them up squarely into position along the width of the cab. From that point, the bracing will either hold everything into alignment, or push everything out of whack. 1/16th of an inch here or there is all it takes to really get the other panels out of sorts.

I currently use a track saw system (shown on Page 1 of thread), which has been an exercise in compromise. I don't have my own shop. Just the garage which we primarily use for the cars, so no space for a table saw, which would be lovely for projects like this. When fabrication requires something fancy, I hit up the local maker-space downtown which has dumb-near everything.
Radian thanks for the reply. I am currently planning my first build for either T60 or T45 (leaning toward T45). I read the plans multiple times and want to ensure I have the correct tools for a seamless experience.
Right now I am contemplatign between a quality circular saw OR a table saw OR both.
I am getting 5x5 sheets that will be need to be ripped in more manageable sheets so I believe I need a circular saw for that (considering Makita 5007Mg or SKILSAW SPT77WML-01). In that case, perhaps a table saw is not needed at all? Let me know if you have insights..
2x20" Titan 39 loaded with Eminence KAPPALITE 3012F
QSC 1804 Amp
DBA Driverack 260 Speaker Management

User avatar
Bill Fitzmaurice
Site Admin
Posts: 29016
Joined: Tue May 02, 2006 5:59 pm

Re: Radian's T48 slim build

#73 Post by Bill Fitzmaurice »

I built every prototype with a circular saw, just to be sure it could be done. Do not buy a corded circular saw, you can't use that in the lumberyard parking lot. This one looks good: https://www.greenworkstools.com/product ... KrrY_m-4zw

Joman116
Posts: 59
Joined: Sat Jun 21, 2025 4:40 pm
Location: TX

Re: Radian's T48 slim build

#74 Post by Joman116 »

Bill Fitzmaurice wrote: Wed Dec 17, 2025 9:20 am I built every prototype with a circular saw, just to be sure it could be done. Do not buy a corded circular saw, you can't use that in the lumberyard parking lot. This one looks good: https://www.greenworkstools.com/product ... KrrY_m-4zw
The gentleman I am planning to purchase has an enclosed warehouse where he has pallets of the wood..he has a power outlet nearby. I prefer to get corded...unless there is some other reason other than convenience?
2x20" Titan 39 loaded with Eminence KAPPALITE 3012F
QSC 1804 Amp
DBA Driverack 260 Speaker Management

User avatar
Bill Fitzmaurice
Site Admin
Posts: 29016
Joined: Tue May 02, 2006 5:59 pm

Re: Radian's T48 slim build

#75 Post by Bill Fitzmaurice »

I'll put it this way. I have two corded circular saws. I haven't used either for at least 12 years. They just collect dust, along with all my other corded hand tools.

Post Reply