series voice coils / woofers parallel vs parallel voice coils / woofers series.

I searched and had no luck. reason I ask is because I went from series voice coils / woofers parallel to parallel voice coils / woofers series when I changed enclosures. I did this out of curiosity since the final ohm load is 2 either way. the reason I ask is I have distortion running them parallel voice coils / woofers series. I know that when you run them parallel voice coils / woofers series you are essentially taking the each 1 ohm and bringing them back to 2 as opossed to taking them to 4 ohm and bringing them back down to 2ohm. I have 2 kicker cvr122's by the way. (there 2 ohm by them selfs)