I just bought a used 2004 TSX and wanted to replace the factory speakers. I bought 6 1/2 in. Infinity Kappa Two-Ways for the doors and Infinity Kappas 6x9s for the Rear Deck. I plan on putting a sub in the back eventually too. I installed the 6x9s yesterday but they sound terrible. I'm guessing the distortion heard in the speakers is coming from not having enough power supplied to them by the factory amp. How would yall recomend setting up the system. Could I hook up the sub and 6x9s on one amp and get by on the factory amp for the door speakers or would I run into the same problem again. Thanks for the help.

 

I recommend an amp to all aftermarket speakers you get the best sound that way

 

amp them