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Dual 3.5" Dash Speaker Adapter — source image

Design by Beef_Supreme_Designs · Original design · CC-BY-SA-4.0 · Source details. Indexed via 3DCarParts. Source text and images remain credited to their creators; no modified design files supplied.

Designer source image. It may show an installed part, prototype or render; it is not an Orphaned Parts production sample.

DESIGN LIBRARY · interior

Dual 3.5" Dash Speaker Adapter

Dual 3.5" Dash Speaker Adapter design listed for 1973–1979 Ford F-Series. Listed category: interior. Verify dimensions, fitment and material suitability before printing.

Make
Ford
Model
F-Series
Year range
1973–1979
Submodel
Not supplied
Engine
Not supplied
Fitment review needed

Source approval status: pending. Source flags do not certify fit, material suitability or safety for your vehicle.

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License conditions, files, application and fit are reviewed before work is accepted.

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Description

This adapter lets you use two 3.5" speakers instead of a single 5x7 speaker in non-A/C equipped '73–'79 Ford trucks. The defrost vents get in the way so I had to run the speakers front to back instead of side by side. It might work on A/C trucks too, but I don't have one to test with.

Print in PETG or better so it survives the heat.

Requires:

6x E-Z LOK 240-332-BR 10-32 threaded inserts
4x #10-32 1/2in machine screws
2x #10-32 1in countersunk machine screws

Print with supports with around 40% or greater infill. When finished, place the threaded inserts into the holes split side out and then use a vise or pliers to seat them into the adapter. Attach your speakers with the 4x 10-32 machine screws and then fish the unit up into your dash and fasten it to the dash with the 10-32 countersunk screws. The stepped side points towards the rear of the truck to clear the bump for the dash pad. Enjoy

Source description, under the recorded CC-BY-SA-4.0 license.

Print instructions

Standard FDM printing settings:
- Layer height: 0.2mm
- Infill: 70%
- Supports: As needed

Settings from the source; not independently tested by Orphaned Parts.

CHOOSE YOUR FILAMENT

Print price estimates

Planning prices for one print, not a final quote. Defaults use a size allowance inferred from the part name, not a measured or sliced model. Filament suitability must be confirmed.

FilamentUSD / printApplication notes
PLA$28.50Indoor prototypes; not a default material for hot vehicle interiors.
PETG$29.00General-purpose candidate; heat and creep need review.
ASA$32.50Candidate for UV exposure; verify temperature and geometry.
ABS$31.50Enclosed printing; review application and dimensions.
TPU$37.50Flexible designs only; not a substitute for rigid materials.
Nylon$37.50Moisture, tolerances and application require review.
PA-CF$42.50Filled nylon; abrasive filament and fit need review.
Pricing assumptions and exclusions

USD: ($6 setup + $3 finishing + filament weight × assumed spool cost × 1.25 waste allowance + print hours × $2.50 × material time factor) ÷ 0.65. Rounded up to the next $0.50.

Assumed spool costs per kg: PLA $25, PETG $30, ASA $40, ABS $30, TPU $45, Nylon $65, PA-CF $95. Time factors: PLA/PETG 1.0, ASA/ABS 1.2, TPU 1.6, Nylon 1.4, PA-CF 1.5. These are proposed shop rates, not measured production costs.

Design work, test fitting, hardware, shipping and tax are additional where needed. Multi-file sets may need several prints. Use actual sliced weight and time when available. Final pricing is confirmed in writing.

All available source data
Id
0aec4a4a-1cdb-40c7-95da-d77a00fd816f
Part Name
Dual 3.5" Dash Speaker Adapter
Slug
dual-35-dash-speaker-adapter
Category
interior
Cswp Approval Status
pending
Download Status
approved
Make
Ford
Model
F-Series
Year
1973
Year End
1979
Submodel
Not supplied
Engine
Not supplied
Created At
2026-05-06T07:16:28.601393+00:00
Origin
aggregated
Source
thingiverse
Source Url
https://www.thingiverse.com/thing:7341107
Source Creator Url
https://www.thingiverse.com/Beef_Supreme_Designs
Cc License Code
CC-BY-SA-4.0
Cc License Url
https://creativecommons.org/licenses/by-sa/4.0/
For Sale
No
Fulfillment Mode
platform
Manual Price Cents
Not supplied
Image Url
https://r2-upload.3dcarparts.workers.dev/file/parts/0aec4a4a-1cdb-40c7-95da-d77a00fd816f/images/dual-35-dash-speaker-adapter-1_1778051789552_k3xpnt.jpg
Author
Beef_Supreme_Designs
Estimated Price Cents
Not supplied
HasMultipleModelFiles
No
ModelFileCount
0
Download Count
5
Detail Url
https://3dcarparts.org/library/1973-1979/Ford/F-Series/dual-35-dash-speaker-adapter

Source price fields and sale flags are metadata, not our selling prices. Their currency was not specified in the catalog. File counts do not mean files were downloaded or tested. No manufacturer savings or discontinued status is inferred.

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