Weseixas - So I understand that in general case manufacturer of the module and maker of the amplifier says that this amplifier is not guaranteed to perform with less than 2 ohm and we know that some speakers are exception.
Manufacturer does not recommend using amp for load impedances lower than 2ohm. We could keep guessing why (damage to amp, damage to speakers, not holding other spects etc.) but to me 2ohm is min. I also understand that Muralman has limited choice of amps capable of driving 1 ohm speakers so he tried Icepower and as I understand was very successful.