Additions to my sound system.. I am a HUGE audiophile. As noted before I wouldn't settle for anything less than perfect audio. The kenwood head unit allows me to set the front and rear high pass filters, along with the frequency sent to my subs (I have it sent to a 60Hz cutoff). This allows the subs to pound without getting that muddy and muffled sound. The bass (shown below) is tastefully fine tuned.My head unit also allows me to plug in USB drives to deliver crystal clear audio. No hiss or fuzz whatsoever with the USB selected as the audio source. It is also iPod compatible... but if you appreciate high quality audio, then you don't have an iPod haha. I wired the USB drive input into the glove box, and the 3.5mm auxiliary input is wired into the center console so that no wires are shown!