Punisher, if your looking at speakers that are 2 ohm's you will need a serious amp to power them. The way that amplifier companies make the amp stable to a lower impedance is by adding transistors, the more transistors the more power and the lower the impedance the amp will be stable to.
Depending on the speaker manufacture, some label the normal impedance, others will give you the normal, and minimum at the frequency that the minimum occurs at.
Any average receiver will have a onboard amp powerful enough to power a 6 or 8 ohm speaker. Some receivers can power a 4 ohm load, Denons are popular.. for a 2 ohm speaker, most receivers will not have an amp powerful enough to power those, you will need to find a dedicated amp that is stabile to 2 ohms. Plan on spending some cash for one.
