amazing man, I hope you get a good harvest
What's the max height the plants can reach? ..the speaker only looks 2 feet high at most and you'd have the light in there too. Do you have enough height?
I guess you're going to train them along the soil, but even still that only looks like 6 inches or so:
What about airflow, it doesn't seem like there'd be enough fresh air in there?
..and what kind of light is that, it mustn't get very hot?
Good luck man, let us know if it works & you get a good harvest (if it does I'll want to try it too)