That is also stated clearly in the comments.
Reddit really wants to run with the default speaker name theory, though.
Actually sounds a lot like "that was the default name but now that everyone's making a big deal about it I'm assuming I must have named it that". I wouldn't assume that this "confession" means that reddit's theory is at all incorrect.
Witnesses are terribly inaccurate sources of information, unfortunately.
(Not to say the alternative also couldn't be the case)
So your assumption seems the most likely. I highly doubt a 16 year old kid is firmware hacking a cheap speaker just to rename it for a "joke"
We used to call such devices "boomboxes". And a bomb makes "boom".
Wiktionary also has this meaning listed for bomb: "9. Something highly effective or attractive."
Removed for violating Rule #6: Must be a kid and must be stupid.
Common reasons for this remove include but not limited to:
Teens are not considered kids as its a different kind of stupid.