Pioneer DEH-P4600MP AUX issue, Please help greatly Appreciated!

[TylerDaniels]

I Have my Pioneer DEH-P4600MP set up on Auxiliary and I have wired an RCA cable into my psp for MP3 Audio and everything plays, but the problem is the volume sucks, I had this with another MP3 player and thought it was the player but now im realizing its the deck.

My question is, what can I do to further Amplify the sound so it will play louder. I do have an amp for my subs and that is not the issue. I have been looking into the CD-RB20 or the CD-RB10 but I don't know if this technology will help amplify the sound for me.

Any suggestions or ideas would be greatly appreciated!!!!

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