I picked up my 2013 Hyundai Elantra GT on Friday and put in all-new speakers this weekend to replace the stock paper cones that came with it. I'm using the stock head unit with no extra amp. Factory tweeters were just using a resister. Replaced with component sets for the front and coaxial sets for the back.
Although the sound is much cleaner than before, it seems like there is WAY too much treble in my music, something that becomes extremely apparent as I increase volume. I set the front crossovers sets to -3db for the tweeters and have to set the treble to -7 (out of +/- 10) on the head unit to sound halfway decent.
I purchased the following speakers.
Polk DB6501 and Polk DB651
Crutchfield says the speakers are rated for a minimum of 10w... not sure if my headunit outputs that or not. I'm not so wild about getting an external amp as that requires a lot of wiring. I'm not sure if I should return these and get something else