If I were to make these out of wood for an entertainment center (Legs would be 12" tall, 18" wide), would they be strong enough without a stretcher running between them?
EDIT:
To add some context…
Here is a picture of the entertainment center, hairpin legs as a temporary placeholder.
Depends.
What sort of joinery are you using? What sort of would are you using? How much weight are you putting on top of them?
Personally, I’d add some sort of extra reinforcement. With all the valuable, delicate, and expensive electronics on top, I wouldn’t risk it. You could do some tests first and see how you feel about it, though.
https://imgur.com/GAOXvQW
Here is a picture of the entertainment center, hairpin legs as a temporary placeholder. Made with 3/4" walnut plywood for the top. Wooden legs can be any species, but my intent is to dye it black.