audio issues in 94 cutlass supreme

Hello everyone! I am seeking some help, I installed a new Cd Player to Replace my tape deck, I hooked all the wire up correct no problems, mounted and installed fairly easily, the audio sounds great except one thing. I have lost the bass pretty much. Its still there but not like it used to be. Specs of the Cd deck, Brand: Dual
Watts: 60w
Condition:Brand new in box

2nd issue i ran into,
I was replacing a blow out 6x9 and when i hooked up a factory stock replacement, it worked, but my other 6x9 was very loud and the replacement was very quiet.

Any ideas would be so helpful. By the way, im trying to get my 4door cutlass supreme wipped into shape. I got a high performance air filter in it, new lower ball joints, new struts, but im looking to boost it in the speed area. any ideas?