I dont know where you would find specifics but I can give you a run down on ohm loads, Just tell me what is you are trying to find out.

(given there is a lot of information in this department that most no one cares to know, plus a lot of usefull things)

Basics:

lower ohm load, more power, but more heat, most amps can handle a 2 ohm load mono these days but anything lower than that will burn them up under constant usage. Also the amount of power you get from droping an ohm load varies from amp to amp.

example:
Decent Rockford amp will more and likely double wattage when dropping from 4 to 2 ohms
where as a competition orion amp rated @ 1 watt @ 4 ohm can be dropped to 1000 watts @ 1 ohm