Hopefully someone can shed some light... Just as a bit of background info, in my previous vehicle I had Crescendo splits and a Crescendo sub run by a Genesis Profile 5 amp, all connected to a DNX7360BT Kenwood HU ($2000). Sounded nuts! I now have a 2012 SV6 VE Series 2 and had an aftermarket system installed. This is what I installed: - Morel Elate 602 Splits (Front) - Hybrid Integra Ovation Coax 6" (Rear) - POLK MM1240 Subs - Alpine PDX M12 Mobo (Subs) - Alpine PDX F6 (Splits) - Dynamatt front/rear doors, boot lid, etc. I had a Rux Knob installed in the glove box and everything was done using Stinger cabling. He used the Alpine KCE 431R Converter to get the signal from the HU to the Amps. The work he did was absolutely amazing, installed professionally and I wouldn't hesitate a second before recommending him, there's no engine noise, no rattling, so I'm confident the issue isn't with the installation. Even though the system sounds insane, I was disappointed because of the expectations I had based on my old Crescendo system which wasn't worth nearly as much. I'm a DJ by profession so all my files are .wav files burned to a CD. I have a few questions regarding what I believe to be the ONLY possible culprit in this situation - the head unit. Everything up to ~35% volume, sounds flawless and crystal clear, once you exceed that, it starts sounding really piercing and all the highs are ear piercing, I have turned down the treble on the HU to almost -9 and it sounds better....at all times however, the bass is very clean and punchy. 1. Should I have Dynamic Distortion on the HU turned OFF? Or on setting 1 or setting 2? 2. Does Dynamic Distortion guarantee that the HU is providing a 100% clean and undistorted signal to the amps? 3. Will the HU provide a better/cleaner signal if a .wav file is played off a CD rather than through the USB iPod connectivity in the Centre Console? 4. Will the HU provide a better/cleaner signal through the 3.5mm AUX jack?! 5. What does the LOUDNESS setting in the Sound Settings mean? (I would check the manual but I'm at work) Any help/ideas would be appreciated. Thanks!