Simple bass speaker made from an old jerry can
Step 1: Mark Hole
Step 2: Drill Beginning Hole Then Jigsaw the Circle Out From There
I used a wood blade no problem
Step 3: Test Fit Speaker
I also added the foam padding stuff from the old donor speaker inside
Step 4: Fit Crossover and Input to Back
I simply jigsawed out from a center point after marking the right side then bent the flaps inwards with a hammer
Step 5: DONE!
(I pre drilled little holes before screwing in by hand)
Step 6: Here It Is, by My Other Speaker
Looks cool and I marked, cut, cleaned and finished in just 2 evenings. I hope this gave you some good inspiration I am aware it wasn't incredibly in depth!