^^I agree with you Mike - I recommend the Fountek's for replacement of other 8ohm drivers like in our E53 midranges - had I known the HK system was 3ohm I would not recommend - Basically you need to give double the input to have the same output as the factory driver, its not doing your upgrade any favors -
I would have recommended the 65mm Vifa/Peerless midwoofers that Jay purchased and also recommended on the E46 boards -
Maybe Mike (Clockwork) would take the Fountek's off your hands