Custom Subwoofer with Grandson Ryan

  • Subwoofer location - a storage bin area on left side of trunk

    Subwoofer location - a storage bin area on left side of trunk

  • Cutting out templates

    Cutting out templates

  • Laminated particle board stack, with internal cavity cut out

    Laminated particle board stack, with internal cavity cut out

  • Top and bottom added

    Top and bottom added

  • Lugging the assembly to the car for a test fitting

    Lugging the assembly to the car for a test fitting

  • Upholstering the subwoofer enclosure with carpeting

    Upholstering the subwoofer enclosure with carpeting

  • Subwoofer finished, installed, and thumping!

    Subwoofer finished, installed, and thumping!

In June 2012, my wife Carolyn took off on a horsepacking trip with one grandson. Presto, a great opportunity for some bonding between me and our other grandson, Ryan. He had recently started driving, and wanted to install a subwoofer in his car, presumably so he could damage his hearing like all the other kids. Now with my medical background, I could have focused on the hearing risks of :boom cars”. But recalling my own youthful experiments in car audio (which is another story) I decided to be a buddy and we took on the project together.

His Audi A4 sedan had a hollow area in the left trunk area. It was irregular, so I showed him how to create a cardboard template of the shape. We glued up many layers of 3/4″ particle board, then bandsawed a shape to fit, and hollowed it out leaving a 1″ wall thickness. After gluing on a top and bottom, and a framed box to mount the speaker, the whole thing was covered in carpet, and a wood grille was added to the front for protection. Finally I helped him tap into the car’s power and speaker lines, wiring everything up with a subwoofer amplifier. 

Like a good grandpa, I cautioned him about turning it up to far. As he drove away, I’m pretty sure he cranked it up to the max as soon as he exited the driveway.