How to Bridge a Four Channel Amplifier

How to Bridge an Amplifier

How to Bridge an Amplifier

Bridging refers to combining two (4) channels of an amplifier into one (two) channel(s) with twice the voltage. A two channel amp might be bridged to 1 channel, and a 4 channel amp into two channels. Bridging the channels will increase the power output. An amplifier is often bridged to mix two channels to power one subwoofer, or to mix 4 channels into powering two subwoofers. To make clear, you can not bridge a monoblock amplifier!

The definition of bridging is combining two or extra channels, and a monoblock amplifier has only one channel. You will want opposing channels with a purpose to bridge the amplifier. In technical phrases, you utilizing a low supply impedance to drive a big load impedance, which leads to most voltage switch. Bridgeable amplifiers are designed with an inverted channel for bridging functions. The inverted channel produces voltage that’s generated on the reverse polarity of the common, un-bridged channel. Bridging an amplifier produces virtually 4 instances the quantity of power as it could in an un-bridged standing.

Before you try to bridge an amplifier, there are particular conditions you have to have in mind. Only bridge an amplifier that may deal with the elevated power load. Do not bridge an amp that might be unstable on the bridged load, or if the speakers can not deal with the elevated power. Always verify your product’s paperwork and diagrams earlier than you bridge your amplifier. Using your amplifier’s paperwork is the best manner to determine the way to bridge your amplifier.

Another instance could be utilizing a 4-channel amplifier to drive your entrance speakers with two of its channels, whereas powering a subwoofer with its different two channels bridged collectively, saving you the necessity to purchase and set up a brand new separate amp on your subwoofer.

Not all amplifier might be bridged. Internally, bridgeable amps are designed with an inverted channel for bridging functions. The inverted channel produces voltage that’s generated on the reverse polarity of the common, un-bridged channel. Theoretically, bridging an amplifier permits it to supply virtually 4 instances the quantity of power as it could in an un-bridged mode. For instance, a 50 Watts X 2 amp bridged would act as a 200 Watts x 1 amp.

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So how are you going to bridge an amplifier? Let’s discover out.

Disclaimer on the way to bridge an amplifier

Before making an attempt to bridge an amplifier, there are some things you want to remember. First of all, you should ensure that your amplifier might be bridged. This should be indicated on the consumer’s information that got here with the amplifier. If your amp is used, or lacks documentation, verify the producer’s web site.

Bridging an amplifier cuts its impedance load (measured in ohms) in half, which may trigger it to overheat. That mentioned, make sure that your amp can perform appropriately and effectively at half the ohms it at the moment makes use of. Most amps in the marketplace have a small diagram that signifies the terminals you’d use to bridge it. Don’t bridge your amplifier in case your speakers can not deal with the elevated power.

Always verify the consumer information and diagrams earlier than you bridge your amplifier. Using your amplifier’s guide is the best manner to determine the way to bridge it.

How to Bridge a Two-Channel Amp

To bridge a two channel amplifier, find the amp terminals. On a 2-channel amp, there are 4 terminals: a optimistic (+) and a adverse (-) for the correct channel , and likewise for the left channel.

How to Bridge an Amplifier

Each terminal might be labeled as follows:

  • Right Channel
    • “A” (optimistic)
    • “B” (adverse)
  • Left Channel
    • “C” (optimistic)
    • “D” (adverse)

From the wires popping out of your subwoofer, join the optimistic speaker result in the optimistic terminal (A) of the correct channel, and join the adverse speaker result in the adverse terminal (D) of the left channel. Connect these wires by unscrewing the screw in that terminal, putting the wire in between the top and backside parts of the terminal, after which screw the screw down tightly to safe the wire. This completes the method of bridging a two channel amplifier. What this connection does is it combines the power from the 2 separate channels, doubling your amp’s power output.

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How to Bridge an Amplifier

How to Bridge a Four Channel Amp

Bridging a 4 channel amplifier is not any totally different than bridging a two channel amp. Before making an attempt to bridge your 4 channel amplifier, make sure that, it is bridgeable. Read the consumer’s information or do your analysis.

On your four-channel amp, you should see 8 terminals: channels 1 by 4 every have a optimistic (+) and adverse (-) terminal. Each terminal might be labeled as follows :

How to Bridge an Amplifier

Channel 1

  • “A” (optimistic)
  • “B” (adverse)
  • Channel 2
    • “A” (optimistic)
    • “B” (adverse)
  • Channel 3
    • “A” (optimistic)
    • “B” (optimistic)
  • Channel 3
    • “A” (optimistic)
    • “B” (optimistic)

From the wires popping out of your first speaker, join the optimistic speaker result in the optimistic terminal “A” in channel #1 and join the adverse speaker result in the adverse terminal “D” in channel #2.

Likewise, take the wires coming out of your second speaker and join the optimistic speaker result in the optimistic terminal E in channel #3, and join the adverse speaker result in the adverse terminal H in channel #4.

Again, similar to bridging a two-channel amplifier, join these speakers wires to the amplifier by unscrewing the screw, putting the wires in between the top and backside parts of the terminal, after which screw the screws down tightly to safe the wires.

How to Bridge an Amplifier

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