New speakers don't sound good

Business Kat

I'm pretty sure it's a poor installation and a possible blow out of one woofer. They really pushed it during the whole trial and error tuning. I'm just gonna have to take it somewhere for a check up once it's all done. Just for my own reference, the crossover goes between the tweeter and woofer to control what goes where?

And finally, the mm have a 2.7 decibel or something and to me that means nothing but I know it's something unique and I'm thinking the installer doesn't know either. Thank you guys for all the help again.