How To Bridge a Car Stereo Amplifier For More Power


What does Bridging an Amp Do For Loudness?

If you want to make your car amplifier more powerful that can be possible with bridging. If you bridge your car amp you are basically joining together both speaker channels. For example, if the right channel is 100 watts RMS and the left is also the same, then the total output power would be 200 watts RMS. Before you proceed with this modification, its best that you look into the user guide to see if it compatible with being bridged properly. The last thing you want to do is damage an car amp from bridging because some are not designed for it and will begin to overheat the transistors. This can be performed to bridge an car amp to two speakers both 4 channel or 2 channel. Please be aware this will change the sound from being stereo to mono, which is why this is mainly used for subwoofers cause there is no separation with bass like there is with vocals.

Here is a car amp bridge circuit diagram that shows you the overall basic layout of the speaker configuration


Instructions on how to bridge a two channel car amp to one speaker or subwoofer

1) Get a screwdriver and remove any existing speaker wires that are connected to the amp.

2) For a two channel amp, there will be two sets of negative and positive screw terminals.

3) So if you are connecting one subwoofer, then connect the negative black wire from the voice coil to the - terminal on the left channel.

4) Connect the red positive wire from the speaker to the + on the opposite right side channel. So you should have one wire coming from one channel and another connected into the other seperate one not in the same one found on the opposite side. For bridging a four channel amp the process is the same you just need to apply the above to the second set of channels underneath the main one for the second speaker thats all really.
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