Was hoping it'd be a decent box, with maybe the subs needing replacement. Turns out, the subs are fine and the box needs replacement.If you have the same box that's rattling, likely broken wood inside.The box IS made with particle board. For small speakers, like surround sound, you can get away using particle.With this sub setup, MDF would've been a better choice for the wood holding the speakers.Arguably the rest the box being particle with MDF to hold the speakers would've been the best choice to still keep this as a budget setup, and not be just junk.I knew buying this, it likely wasn't going to be of the highest quality. I like to build budget systems, have very low standards, so when it fires up I at least get a little surprised.However nah, just got a broken box and alot of disappointment.I'm getting my money back, and keeping the box. No point in sending a pile of firewood with 2 speakers that haven't even seen a bass note back to wherever. They'll likely toss it all anyway.Kind of sad, box looks like a fairly good bandpass box to start with, but sadly I won't be able to even start with mine as it's just broken.*Update 8/10/22*Got the box rebuilt. The grey ports just pop in. Spray adhesive will fix that. Turns out they use some weird hardened stuff with what ended up becoming white dust as the sealant. I popped off one side cutting the carpet to take off the bottom board. Oh boy was thing budget built alright. Took awhile scraping off the old powdery stuff they used. Replacing the board, I figured out the angle I needed to fit MDF board in (my box was warped, but 15° to 17° cuts) and used gorilla glue construction adhesive to seal all the corners. Used 2 24" clamps to squeeze it all together while sealing. Might need to add some wide speaker foam tape for the acrylic piece, might be leaking air. The acrylic piece vibrates a bit, maybe that can be fixed using acrylic bar(s) at 45° angles to stiffen it up.Now that I fixed the box, it's not half bad. The speakers feel stiff springed, I'm used to a cheap sub I had that was soft spring. The amp I have currently is bad, it'll heat up to releasing electronic scents in the air in about half hour. I have a new one on the way. But this part of my review is based on the bad amp powering them. So far they work lmao! Can't lie sorta cracked a smile seeing my rear view mirror vibrate like crazy. And being in my trunk port facing outward technically sealed in my trunk, bass was loud enough to hear clearly with my amp. I'll give a star for the fact the speakers work, and produce a good bit of sound. Amps not that strong so not sure how loud they can really get. Still wouldn't recommend, but at least it's decent (when it's not broken).*Update sep 2*Well, killed the speakers. One threw its coil, the other is stuck. Wasnt trying to kill them. But I guess I was pushing them too hard with a hifonics 1900w amp. Using math with an oscope I was able to get within the speakers range of power with this amp, I did not do the meme of "using gain as volume". I'll still say it was user error (mine), is the reason the speakers blew up. They did sound great before then, but these speakers won't making sound anymore.I don't think I'll need to update anymore. I'll get speakers and give the box one last round. Definitely save up for better, or buy it to use the box as a template to rebuild with better material and reuse the acrylic piece and ports.