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Process Summary:
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lathe - creating a space for the speaker driver.
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Drill press, hand drill and chisel - a space for the amplifier circuit + holes for wires and cables.

Just for fun ~ frequency response is not the greatest. The low-end frequency response is missing: Hollowing out the log (to make it more like a speakerbox) was impractical. With more logs, time and testing equipment it can be made legit!
lathe - creating a space for the speaker driver.
Drill press, hand drill and chisel - a space for the amplifier circuit + holes for wires and cables.