ok this has never been clear to me,, i have 2 dual 4 ohm subs, if i wire them parallel i get 2 ohms at each speaker right? so if i hook up each speaker to each channel that will be 2 ohm load on 2 channels.. now what if i hook up both together and run it bridged on the amp to 1 channel,, does that drop it to 1 ohm or double it back up to 4 ohm load by 1 channel....? does it change since its using both channels as 1???