hpf fixed at 80 hz

what is the difference between stereo and bridged?and how do i wire my components in stereo.I think that the radios front channels are connected to the amp via rca's,the radio has 3 five volt preouts front ,rear, subs. that is how I set it up when I installed it, is this what you meant by connecting the front channels of the radio to the amp channels that power the 3.5s?-A vision without a plan is just a hallucination-