While I still haven’t wired in my I-bus module yet, I have had a few days to play with this head unit. Since I have an iPhone I can’t just plug it into the USB port & play my music that way (well not without an adapter). I’ve been playing my songs through Bluetooth, which sounds 100% better then the mediabridge I had previous to this new head unit. I did however notice a slight brashness/crackling from the front tweeters with the volume up high, & I do mean high! I just thought I needed to move up to the JL speakers soon. However my SD card arrived last night so I threw some music on it & took off this morning for work. Holy shit balls this thing sounds flapping amazing! Way better then the stock unit & omg do the door speakers handle so much more bass than they ever did with the stock unit. I’m not saying your gonna win at a stereo competition, but I never envisioned they could sound that good. The tweeters sound perfect so I’m gonna say that’s just distortion from the Bluetooth transfer. Does anyone have a favorite music app for Android? The stock one doesn’t show my albums or songs. Just all the songs in order that you have to seek through. I downloaded PI music player & while it works great, the next & back track steering wheel buttons don’t work with it, although the volume does. My X did have navigation but not DSP so while I can’t speak for DSP owners, if you just have Navigation this will be a huge sound upgrade alone. My installation notes would be:
I choose to “test” the unit all right in the back, which is easily done.
You have to run a separate wire to connect the 2 blue wires for “amp turn on” between the 2 supplied wiring harness. I think it’s stupid they didn’t include this wire, but it’s not a deal breaker. I made my wire longer then needed & once I had it & the stereo loom routed up through the dash via the path Crowz outlined in his DIY you can then use that extra wire to send cables up & down through the dash as needed later. Cables like the antenna, usb, video feed, rear camera, gps antenna, I-bus wires, etc. Otherwise I pretty much followed Crowz path & was up & running in under 2 hours

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Current vehicles
2001 325XI
2006 X5 3.0
2004 X5 3.0