Dual 3.5" Dash Speaker Adapter
1973-1979 Ford F-series
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
Print Instructions
Standard FDM printing settings: - Layer height: 0.2mm - Infill: 70% - Supports: As needed
Part 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
Print Instructions
Standard FDM printing settings: - Layer height: 0.2mm - Infill: 70% - Supports: As needed