New speakers don't sound good

Business Kat

Hey everyone, I thought I knew what I was doing but I guess I'm just a novice when it comes to all this so I'd really appreciate some advice from you guys that know what you're talking about. I spent about 600 with installation for a set up that I either had way to high of an expectation for or the guys didn't install correctly. I got my care bone stock, btw.

After decinding there is no room for a sub I went ahead and put more money into getting better speakers, polk mm. I went to a shop to have a guy install them and they ran into some complications. When I went to get my car it sounded terrible and they said that the guy who installed my HU just threw all the wires in so they couldn't tell what goes where. They told me to bring it back the next day and they'll finish it. Next day, I got it back and it seems fine. Some of the songs I play make the speakers sound like they're pooping, other songs make it sound like it's blown out and rattling, and some songs sound fine, just fine.

I have the polk MM 6501 with the JL Audio JX360/2 amp. I'm rationalizing and saying that maybe the woofers can't hit those frequencies with some gongs but then that doesn't explain the rattle and the fact that the stock ones could. They just don't sound like $200 speakers. The tweeters are fine, very loud and clear. I remember the crossovers were an issue. I heard them saying they connected it to the tweeters but common sense tells me they just go to the woofers. But then they added an extra pair soo I dunno... help? The speakers came with a pair and I'm assuming it would just be hooked up to the woofers and the tweeters are just there.

I also got a Pioneer TS-SW3001S4 12" shallow sub and got rid of the spare. The amp that I plan on getting is from a friend. It's a rockford fosgate super tiny amp that I think is 300 watts. This is all waiting on a box to be built before installation so if you see any problems let me know!

I'm really upset. I love bass and I understand the speakers aren't going to come close to a sub but the quality just seems so bad. Regular rock songs and most rap and hip hop sound fine, but holy grail, what's your fantasy, and some edm songs really screw things up. I just don't know why I paid so much to have speakers that sound the same sans the distortion at high volumes. Any help would be nice guys. Thank you

edit: If it helps at all it's set up at 4 ohms