Bridging is basically a mode on an amp which occurs when u have 2 channels (e.g. Left and Right) and from each of these channels u get a positive and negative. Now when u get an amp it has a power rating this could be a value of say 600W, this means that each channel is 300W each, when u bridge the channels it means that u change these 2 channels into 1, this is done by placing the positive wire on one channel and the negative wire on the other (i.e. the + of your one speaker goes into the + of the left channel and the - of your one speaker goes into the - of the right channel). When an amp is bridged both the channels are combined thus giving u the full 600W in a single channel, this is best used for subs as subs need more power than regular speakers and are mono anyway!
About Power Ratings:
U should always try to match speaker and amp ratings as best as possible, now u may have seen speakers with a Peak or "Max Power" rating, this is the maximum Wattage that the sub or amp can handle/ dish out in a single movement, whilst RMS (root mean squared) value is the actual value of the sub, which is a lot more accurate than the peak power, as manufacturers sometimes over rate their subs/ amps, as a rough guide u can match Peak power, but this sometimes can result in blown speakers, if u go off RMS values (usually listed in the manual) and match say a 300W RMS amp to a 300W RMS sub, then it will be unikely that you can damage the sub! BTW U will notice that a lot of audio manufacturers place the Peak Value on their boxes etc, this is obviously because the bigger the rating the more powerful it appears.
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Pete
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Cruisewilmslow.vispa.com
