No, I'm fully aware that gorilla glue works well, but it's a classic jack of all trades, but a master of none. It expands annoyingly and gets everywhere. If you have a proper cut joint, or even some silicone, then you shouldn't need expanding glue. Also, wood glue is chemically superior for wood only, and it's about over 1/2 as expensive.
No, in fact, it may sound different, but not better. Plywood is lighter than MDF, and is less dense. It tends to resonate more freely than MDF does, which is why most plywood boxes are braced more than an equivalent MDF enclosure. I don't recommend it for sub boxes. Speakers and/or sub enclosures that you are going to stain are good candidates. Otherwise, there really isn't any point. It's harder to cut (it can chip easily), but it routers like butter. If you think cutting circles in MDF is easy, just try plywood. It's like running your finger through sand.
thats what i thought, but my circular saw cuts angles janky, so i try not to use them.
