The box is definitely sturdy and well constructed. I think that I was hoping for a better product to throw my sub into that would've been less hassle for me, which is the reason I purchased it so I wouldn't be building my own. The port tube was a little loose, so I had to glue it. It was missing a screw on the outside port mounting point, maybe all the black from the carpet and the black screws going into the black plastic confused the assembly person. The terminal cup connectors inside are ridiculously thin and my 1/4" female quick disconnects had to be massively crimped down and still seemed like they wanted to slide off. I actually think I may have to replace the quick disconnects with ring terminals, which fortunately are an option thanks to the nuts that hold the ultra thin gold plated strips to the cup terminal. My final gripe is that the speaker hole was cut oblong, which created a nightmare for setting the speaker for mounting. In hindsight I could've used some bobby pins to repeatedly lift and reset until I found the perfect position before drilling my holes. Additional note, if you are trying to put an Alpine 12" into this box, it for the most part doesn't fit well without some severe maneuvering.
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