As a general comment to all of you who are building a high end audio system in your vehicle and are considering the KD-S100:
This head unit was originally designed to enhance factory speakers. That is what it is good at. An engineer sat inside each vehicle and made custom tunings for each vehicles' hardware and acoustics that the KD-S100 was to be installed in. The Universal Profile variations help our Crutchfield customers achieve customization by having a rage of tuning options to choose from. (available here:
http://www.bongioviacoustics.com/kds100beta.html ) The Digital Power Station technology inside is very powerful and can breathe new life into a stock setup. However, as you spend more money on crossovers, amplifiers and high end speakers, the role of the DPS technology must be adjusted accordingly.
This means a Bongiovi Acoustics engineer would need to sit in your vehicle with the upgraded hardware to create a tuning that allows the high end equipment to perform at it's peak while compensating for acoustics and road noise and other factors. Unfortunately this cannot be done by the end user. We have proprietary software and hardware that interfaces with our technology in this unit. If you are looking for a multiband eq or other features that would allow you to adjust a high end setup, the KD-S100 doesn't have those features.
The KD-S100 IS a very nice sounding unit with features you may want at a great price though. If you are using external components for tuning it could work for your setup and odds are one of the Profile Variations will work nicely with your setup. However I don't want to give any illusions that the KD-S100 is the ideal for this application. Hope this helps!
Joe