SPK-L
- It takes about
- 3-10 hours
- It costs about
- 80 €
- Difficulty
- Medium
- License
-
Speaker Large
By following the instructions below and/or downloading the linked files you agree to the specified license agreement.
Tools
3d printer
Handsaw
Cutter
Soldering iron
Multimeter
Screw_driver
Drill
File
Material
Double sided tape - VHB 3M
PVC tubes - 25mm Diameter
Coloured Filament - PETG
Heat shrink tube
Electric cable - 18AWG
Components
Weights - 2kg
O-ring
Metric screw - M3 X 10MM
Electronic components
Downloads
1 Overview
1.1. SPK-L - Components scheme
2 Printing
Wise advice
3D printed parts: if you don’t have a 3D printer you can produce the pieces in your local FabLab or order them online
2.1. SPK-L - Standard filament
After downloading the files (3D print section above), print the pieces with the following printing settings:
Nozzle: 0.4 mm
Material: PETG
Infill: 15%
Infill-membrane holder: 40%
Layer height: 0.2 mm
Perimeters: 3
2.2. SPK-L - PRINTING THE BASE
Printing the bases:
Nozzle: 1.2 mm, for a riffle effect download our Prusa Slicer Settings
Material: PETG
Layer height: 0.8 mm
3 Preparation
3.1. SPK-L - Cutting of the membrane
Choose among (printed or coloured) cardboard. We suggest corugated carboard with a thickness of at least 3mm.
Draw two half circles on the cardboard and cut them with a cutter.
3.2. SPK-L - Cutting of the decorative layers
Choose among (printed or coloured) cardboards or fabrics (felt)
Draw the outline by hand two times and cut it with a cutter or ask your local fablab to cut it with a laser cutter.
3.3. SPK-L - Finalising one decorative surface
Draw the circles and cut them precisely with the cutter.
4 Assembly
4.1. SPK-L - Lamination
Lamination should be performed with a specialized machine or with spray glue and a lot of patience.
If you chose the second method glue from the center out and be careful not to create air bubbles.
4.2. SPK-L - Preparing the supports
Apply double sided tape on the designed surfaces and refine the glueing surface cutting following the borders with the cutter.
4.3. SPK-L - Mounting the supports
Glue carefully and perpendicularly the amplifier holder in the designated slot
Cut and apply VHB tape in the designated spots for the exciters
Glue the larger surface of the 3D printed holder onto the VHB sticky part and the smaller surface to the exciter.
4.4. SPK-L - CUTTING THE CABLE COVERS
4.5. SPK-L - Cutting and sanding the tube
Cut the tube into the given length, we recommend the use of a metal saw for a clean cut. Make sure to have a straight cut
Make sure to correct and refine the cut using sand paper and/or a file.
Sand the complete length of the tube using a 220-grit sandpaper, this will optimise the grip of the finishing.
Clean the whole surface with rubbing alcohol and a soft cloth.
4.6. SPK-L - MAIN POWER CONNECTION
Solder the cable C to the cables running inside the SPK tube.
4.7. SPK - INSERTING THE O-RINGS
Slide the two o-rings inside the slots on the amplifier holder.
4.8. SPK-L - CONNECTING THE TUBE TO THE SUPPORT
Inser the membrane connector inside the pvc tube. Make sure the connection is tight and secure.
4.9. SPK-L - ATTACHING THE AMP TO THE STRUCTURE
Screw the flexible board holder on the membrane connector.
Insert the board inside the holder: slightly pull the 3d printed piece, slot the amp inside the c-clips, slowly release the 3d printed board connector.
4.10. SPK-L - ATTACHING THE EXCITERS TO THE AMP
Solder the exciter cable to the exciter connectors. While soldering, mind the polarity.
Connect the other side of the cable to the Amp.
4.11. SPK - Finalization of the tube
Mark and drill three aligned holes on one end of the tube.
Use the file to precisely refine the slot as illustrated.
4.12. SPK - Drilling the base
Mark the measures precisely on the base pieces.
Carefully switch the soldering station on and heat it up to 200°C. Slowly melt the PLA creating the illustrated slots and holes. Help yourself with a file to refine
4.13. SPK - Solder the jack-plug
Cut the cables at the given length
Take the jack plug, identify the + and - with a multimeter and solder the cables. Secure the soldering with heatshrinks
Warning
BE CAREFUL WHEN HANDLING LEAD.
Use protection gloves, don’t touch your mouth and eyes while touching lead and wash your hands carefully when finished. We strongly recommend putting the lead inside a zip lock bag to prevent particles from exiting the base.
Attention
Be sure to fully cover the jack plug contacts with heatshrink to avoid shorts between the pins and the lead.
4.14. SPK - Adding weight and lid
Insert about 2kg lead inside the bottom piece
Insert the jack plug into the bottom piece fastening it at the hole in the external wall
Pass the cables into the hole into the cilinder of the piece
Slide the top piece into the bottom piece by matching the slots with the holes
Slide the cables through the whole length of the tube
5 SPK-L is ready!
