I've been very unhappy with my Shaker 500 also. I was underwhelmed when I first heard it.
Are the Shaker 500 speakers that bad? Has anyone just replaced the head unit or just replaced the speakers? I was wondering what the weak link is, if it is the head unit or the speakers or just a combination of both.
I would like to hook an iPod into my system because I've been unhappy with the iPod FM transmitters. I was thinking about the PIE adapter but now I'm thinking about just replacing the head unit with a JVC unit that has HD radio and iPod interface. JVC KD-HDR1 CD receiver with built-in HD Radio tuner and MP3/WMA playback at Crutchfield.com
I don't know if I should replace my speakers also.