Simplexx 1x12 Build - Woofer only

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LankyJohn
Posts: 24
Joined: Sat Jan 13, 2024 11:05 am
Location: North Yorkshire UK

Simplexx 1x12 Build - Woofer only

#1 Post by LankyJohn »

S12 Build Day One
1. Materials
1 off 12mm ply sheet 6 ft by 2 ft
2. Tools
Saw horses (pair)
Cutting frame
Circular saw
Clamps
Square
Pencil
3. Objectives
Cut main cabinet panels oversize by ¼” to ½” to allow for trimming
4. Method
Ruled dimensions on board.
Cut long strips first – to be used to make jigs.
Cut back, baffle, top, bottom ½” oversize:
To allow for errors because circular saw isn’t precise (blade housing has play even when locked tight).
To be trimmed to final size when smaller & easier to handle / clamp.
5. Results
All main panels cut oversize
Several 2” wide strips will be used for jigs / bracing
Approximately 4ft x 2ft left from 6ft x 2ft sheet left over – plenty for remaining pieces needed.
6. Lessons learned
Circular saw isn’t precise
Saw sled creates slightly off-set (0.5 mm) cuts even though it was made with the same saw.
7. Next
Cut panels to finished size with circular saw.
Trim saw cuts with flush-trim bit using saw sled as a fence.
Finish paired panels with router using one panel as template for flush-trim router bit.
Cut remaining pieces – braces, ports, jack panel
Make right-angle jigs
Photos:
Before: 6x2 board prior to cutting
Before: 6x2 board prior to cutting
After: Panels cut over-size
After: Panels cut over-size
Last edited by LankyJohn on Sun Feb 11, 2024 3:25 pm, edited 1 time in total.
JPbass

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Seth
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Location: Sacramento, California, USA
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Re: Simplexx 1x12 Build - Woofer only

#2 Post by Seth »

Got my popcorn 🍿
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

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LankyJohn
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Location: North Yorkshire UK

Re: Simplexx 1x12 Build - Woofer only - Day2

#3 Post by LankyJohn »

S12 Build - Day Two
1. Materials
Parts from day one: top, bottom, two sides, back, baffle.
PU Glue
2. Tools
Saw horses (pair)
Cutting frame
Circular saw
Hand plane
Brad nailer – 18g 25mm brads
Clamps
Square, pencil, knife etc.
3. Objectives
Cut main cabinet panels to size
Refine edges.
4. Method
Cut parts to size with saw.
Planed edges with a hand plane (easier, quicker & quieter with hand plane than the router).
Baffle cut to nominal size. Needs trimming to a slack fit to allow for glue up.
5. Results
Cabinet glued & pinned
Planed edges
Planed edges
Cab with rough fit baffle
Cab with rough fit baffle
6. Lessons learned
PU glue is fierce. Cures quickly. Oozes all over the place from the nozzle (Bill tells you this).
Read plans carefully – don’t glue panels incorrectly, like I did (top and bottom must overlap the sides), so that you have to undo your work before the glue cures & re-do it.
Brad nailer is essential.
7. Next
Shape & fit baffle to allow for glue.
Cut back to size, make & fit braces etc.
Cut port pieces (shape edges with 45º chamfer bit),
Order parts: La Voce driver, recessed jack plate, 2 off Neutrik Speakon 4-pole sockets
Speaker grille
Feet
Strap handle
Cab paint
JPbass

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Bill Fitzmaurice
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Re: Simplexx 1x12 Build - Woofer only

#4 Post by Bill Fitzmaurice »

I hope you didn't glue the baffle in before cutting the driver hole, and the port holes if you're going to port, which you must with a low Qts driver.

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LankyJohn
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Location: North Yorkshire UK

Re: Simplexx 1x12 Build - Woofer only

#5 Post by LankyJohn »

Thanks Bill.


No glue on the baffle yet - just a friction fit, to help support the cab geometry while the glue cures.
Need to cut the driver hole, port corners & trim to give relief to allow for glue without scraping too much off.
JPbass

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AntonZ
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Location: NL

Re: Simplexx 1x12 Build - Woofer only

#6 Post by AntonZ »

How did you make sure the ooze out from curing glue did not permanently glue your baffle in place while it supports the cab geometry? I'm starting a S10 soon and intend to cut the port corners first for this reason.

Bruce Weldy
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Location: New Braunfels, TX

Re: Simplexx 1x12 Build - Woofer only

#7 Post by Bruce Weldy »

AntonZ wrote: Mon Feb 12, 2024 4:56 pm How did you make sure the ooze out from curing glue did not permanently glue your baffle in place while it supports the cab geometry? I'm starting a S10 soon and intend to cut the port corners first for this reason.
Or, just use these......I've got 4 of 'em that I made from scrap and have been using for almost 15 years. Corners are square every time....
052410 Subs3.JPG
DSCF1745.JPG

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."

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LankyJohn
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Location: North Yorkshire UK

Re: Simplexx 1x12 Build - Woofer only

#8 Post by LankyJohn »

AntonZ wrote: Mon Feb 12, 2024 4:56 pm How did you make sure the ooze out from curing glue did not permanently glue your baffle in place while it supports the cab geometry? I'm starting a S10 soon and intend to cut the port corners first for this reason.
I removed the alignment strips that were tack-nailed to the edges of the top & bottom of the cab, before the glue had cured enough to stick them on (less than 3 minutes), then scraped away any internal ooze-out & tapped in the baffle.
HTH
JPbass

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LankyJohn
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Location: North Yorkshire UK

Re: Simplexx 1x12 Build - Woofer only

#9 Post by LankyJohn »

Bruce Weldy wrote: Mon Feb 12, 2024 7:07 pm
AntonZ wrote: Mon Feb 12, 2024 4:56 pm How did you make sure the ooze out from curing glue did not permanently glue your baffle in place while it supports the cab geometry? I'm starting a S10 soon and intend to cut the port corners first for this reason.
Or, just use these......I've got 4 of 'em that I made from scrap and have been using for almost 15 years. Corners are square every time....

052410 Subs3.JPG

DSCF1745.JPG
That's a great idea - more clamps ordered (one can never have too many clamps :wink: )
JPbass

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LankyJohn
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Location: North Yorkshire UK

Re: Simplexx 1x12 Build - Woofer only

#10 Post by LankyJohn »

Progress update after days 3,4& 5 (not complete days. Few hours here & there.) Been busy with life - rehearsals, organising gear etc.
S12 Build
Days 3,4 & 5 (Condensed progress report)
1. Materials
Parts from previous days.
PU Glue
2. Tools
Saw horses (pair)
Cutting frame
Circular saw
Hand plane
Hand drill /bits
Router / bits
Brad nailer – 18g 25mm brads
Clamps
Square, pencil, knife etc.
3. Objectives
• Cut back to size, make & fit braces etc.
• Cut port pieces (shape edges with 45º chamfer bit),
• Order parts:
◦ La Voce driver
◦ recessed jack plate
◦ 2 off Neutrik Speakon 4-pole sockets
◦ Speaker grille
◦ Feet
◦ Strap handle
◦ Cab paint
4. Method
• Cut back, port pieces & braces to size with saw. Routed 45º chamfer on port pieces.
• Planed square edges with a hand plane (easier, quicker & quieter with hand plane than the router).
• Cut baffle to nominal size: trimmed & planed to a slack fit to allow for glue-up.
Obtained parts: driver, jack plate (Blue Aran, UK) handle & feet, Speakon connectors (Penn Elcom, UK). Bolts / nuts (M5, M6) for feet; machine screws / nuts for Speakon connectors (M3) obtained locally.
• Routed baffle aperture:
◦ Drilled a 6mm hole (in the 6mm thick temporary router “table” at the radius distance from the appropriate edge of a 6mm straight router bit.
◦ Drilled a 6mm hole in the centre of the baffle aperture
◦ Fastened baffle to a piece of scrap backing 12mm ply using double sided tape: making sure centre waste portion & baffle will remain glued to the backing piece when cut.
◦ Drilled attached backing through baffle centre hole with same 6mm bit.
◦ Removed bit & inserted it in the hole in the router table.
◦ Adjuster router plunge/depth to give enough travel to cut through baffle, but not the backing.
◦ Placed baffle / backing sandwich on drill-bit pivot & cut the baffle aperture.
• Glued / pinned all parts (baffle / port pieces / braces) in place. Used brad nailer with spacing scrap to facilitate easy(ish) removal of nails near radius corner edges.
• Removed nails after 24 hours
• Sanded cabinet & rounded corners
• Installed & wired driver, jack plate, feet, handle
• Tested cab. per instructions – no leaks. Been too busy to run it with 30Hz tone.
Needed to sort amplifier(s).
• Ordered grille (www.speakergrills.co.uk ) and cover (https://www.hotcovers.co.uk/) Tuff Cab speaker paint (Blue Aran, UK)
5. Results
• Cabinet functionally complete
• Took it to band rehearsal – excellent – clearer, louder for same input with more extension than existing commercial sealed 1x12 (as expected / anticipated.
6. Lessons learned
• Use off-cut from routing speaker aperture as a protector when fastening speaker.
• Clamp port pieces firmly to prevent any movement when nailing.
7. Next
• Remove driver, handle, jack plate, feet.
• Paint baffle & port interiors matte black spray paint (Amazon)
• Paint cabinet with TuffCab paint & rollers
• Allow to dry & refit parts
• Print & fit BF logo on baffle (so it is protected)
• Obtain / make stand-off mounts for baffle
• Mount / fit baffle
Pics:
Baffle routed
The attachment Simplexx112_bulid_Day3-4-5_02.JPG is no longer available
Jack plate in back
Simplexx112_bulid_Day3-4-5_02.JPG
Simplexx112_bulid_Day3-4-5_03.JPG
Baffle, internals/braces (not in order of construction)
Simplexx112_bulid_Day3-4-5_05.JPG
Simplexx112_bulid_Day3-4-5_08.JPG
Simplexx112_bulid_Day3-4-5_07.JPG
Simplexx112_bulid_Day3-4-5_04.JPG
Showing as much of wadding as possible
Simplexx112_bulid_Day3-4-5_09.JPG
Cabinet front
Simplexx112_Front_012.JPG
Last edited by LankyJohn on Wed Mar 13, 2024 12:25 pm, edited 2 times in total.
JPbass

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LankyJohn
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Location: North Yorkshire UK

Re: Simplexx 1x12 Build - Woofer only

#11 Post by LankyJohn »

Forgot to add - glued T-nuts into driver-mounting blocks

Works very well with other sealed cabinet
Simplexx112_bulid_Day3-4-5_011.JPG
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Tom Smit
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Re: Simplexx 1x12 Build - Woofer only

#12 Post by Tom Smit »

Nice progress.
TomS

tallevan
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Location: London, England

Re: Simplexx 1x12 Build - Woofer only

#13 Post by tallevan »

I have that 12" GK extension cabinet as well.
I predict you will notice a considrable difference between the two..

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LankyJohn
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Location: North Yorkshire UK

Re: Simplexx 1x12 Build - Woofer only

#14 Post by LankyJohn »

tallevan wrote: Thu Mar 14, 2024 3:37 am I have that 12" GK extension cabinet as well.
I predict you will notice a considrable difference between the two..
Thanks. Yes. Definitely very different beasts, but they do work well together
JPbass

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LankyJohn
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Location: North Yorkshire UK

Re: Simplexx 1x12 Build - Woofer only

#15 Post by LankyJohn »

Paint & rollers have arrived today - waiting for grille & matte black spray for baffle & ports
JPbass

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