You must have tested them? I have the 7KD 16v version and getting the 12v 7KDnitro at the end of next week. The 16 volt is sick, almost 5 dB over the single M3 I had. But you would need the 12v version and run it .5 ohm. I need to get me some dual .7 ohm drivers so I can test a bit better and maybe find the limit of this amp

I can send pics if you like

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-Donald Hebig
-Subwoofer design & modification expert
-Numerous Records, buisness awards, and vehicle cabin/enclosure design innovations.
-Team Audio Express 96-08
-Owner and engineer of the late Beyond Audio
-Professional car audio since 91' and never looked back