stereo Vs mono

what´s the difference between a 2ohm mono load and a 2ohm stereo.. been seing some specs on an amp and  they have for 2ohm stereo and different (more powerful) for a 2ohm mono...

and how can you get a 2ohm stereo and a 2ohm mono???????

Let me clarify there: it makes 2 channels into 1 channel. You can't bridge more than 2 channels together. So a 2chan amp can run as 2ch or 1ch bridged. A 4ch amp can run as 4ch, 3ch (bridge 2 to make 1, don't bridge the other 2...used to run subs and rear speakers at the same time), or 2ch (bridge 2 to make 1, the other 2 to make the other 1) etc.

a 2 ohm stereo load would be if you've got a dual 4-ohm DVC sub with the voice coils wired in parallel, going to each channel of the amp.  Thus each channel is seeing a 2 ohm load, but since the channels are still operating independently of each other, they call it a stereo load.

A 2 ohm mono load is what dragonrage said--it's when you bridge the amplifier.