okay so from what ive gathered in my car audio research ive come to believe that if i hook up the sub to the amp normally it will be 4 ohms, and if that's true then if i were to bridge the sub it would be running 2 ohms? is this correct? im wanting to hook up one sub to an amp at 2 ohms so i can get more output from the sub, rather than if i were to do it normally at 4 ohms and get weaker sub response. do i have the right idea here? is this how the ohms thing works?