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sol asked in Cars & TransportationCar Audio · 1 decade ago

can anyone tell me how to bridge my car amp? thanks?

2 Answers

  • Anonymous
    1 decade ago
    Favorite Answer

    Some amps have the terminals labled BTL. Only use these connection when bridging. Oh, and what TT² said too....

    Source(s): 25 year electronics technician, audio guru
  • π²
    Lv 4
    1 decade ago

    Was the amp designed to be bridgable? If it wasn't, you can damage the amp, your speakers, or yourself this way.

    When you bridge an amp you use the + terminal from one channel and the - terminal from the other. The instructions that came with the amp should describe which terminals to use. If not, look for some indication next to the speaker terminals on the amp. Sometimes, there will be lines connecting the two terminals you should use to bridge the amp.

    You need to get a wiring diagram from the manufacture of your amplifier because there is more than one way to bridge an amp. Ohms is very important and needs to be kept the same. Say you have a 8 ohm amp, and you bridge it for 4 ohm, then this means you can no longer use 8 ohm speakers for the output, or you risk burning them up. In effect you are taking a stereo amp, and turning it into a single amp to pull one channel instead of two. The lower the number on your ohms means the more power the amp puts out, and the thicker the wiring in the speaker must be to handle that power safely. Ohms is resistance. 1200 watts at 1 ohm means you will have a total of 1200 watts output to the speaker, and must use a speaker that is at least 1 ohm rating and no less. Wire up a 4 or 8 ohm speaker, and you may have a fire on your hands, or at the very least you will fry the speaker when you turn up the power because the windings are just too small of wire to handle the power being put into it. Resistance produces heat, and too much resistance will produce fire. One must also take into account the resistance of the speaker cable being used, and to make sure the cable is rated at least large enough to handle the load without heating up like a stove eye. Yes it does mean wiring your subs for a 1 ohm load. Unless your sub has multipule coils in them, then you cannot change the ohms of the speaker. I have seen many speakers that are capiable of being wired at least two different ohms configurations, but it will say this on the speaker itself, or with the instructions that came with it. The best rule to follow is this. Always match the ohms, and you will have crisp highs, and bone shaking lows. Any other way, and you may have a fire. If you don't understand how to wire it, and/or you are not sure, the best thing to do is find someone that does have experience with the wiring.

    You must be very careful when doing this, and DO NOT wire them wrong or you will make a fire, and ruin your speakers in the process.

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