Q&A for How to Bridge an Amplifier

So if you have two subwoofers and a four-channel amp, four channels can be bridged to two channels. Another example is that if you have a two-channel amp with one subwoofer, you could bridge both of the channels for one subwoofer. Typically, the amp will stay on it and be bridgeable, meaning that you'll use one positive and one negative from the two different channels being brought into one.

You will need a 4 channel amp to run 2 speakers in bridged mode. Typically the speakers will be hooked to the positive side of one channel and the negative side of another thus bridging the channels, but this is not always the case. Look for the diagram near the speaker connects to see how yours is bridged. Once the speakers are hooked up, there will be a switch marked Stereo, Mono, or Bridged. Set this to Bridged.

Surely - this is possible. Simply handle the two voice coils like they were from two separate speakers. (And like the description of "Method 2".) Don`t interchange their connections (+ of one vc to - of another). But beware: you'd better feed the four channels with the same signal (which means: all inputs fed from the same source,mono, not stereo), and surely not 4 different signals ("quadrophonic"), to get best results. Treat the voice coil's terminals as they're marked, + as +, - as -.

If your CD player has a line output, you are not going to be able to bridge it. Only amplifiers can be bridged. You are only spltting the audio signal into your receivers and you will need a splitter for that.

If your amplifier is able to do that, you can bridge the two in each pair together.

This is a simple, and requires no image. Take one negative to one positive on each sub. Then run the other positive and negative to the box. You can also reduce the ohms further by bridging it at the amp.

Yes, simply connect the left woofer’s positive to the positive of the left channel on the amp and then do the same for the negative. Repeat the process for the right woofer and the right channel of your amp, positive to positive and negative to negative.

The crossover frequency is the point in the graph of frequencies at which the "roll off" is started. It indicates the point at which you would normally have your amplifier for your main speakers start being full power.

Use channels 1 and 2 for main Left and Right and bridge the remaining channels for the subwoofer.

Yes, you can either connect your first woofer to. For example, channel 1 and your second woofer to channel 2 or bridge your first woofer to channels 1 & 2 and then bridge your second woofer to channels 3 & 4.

Bridge 2 channels to one of the subs and then 1 channel to each of your other subs, otherwise you have to merge all of your channels then split them which could be harmful to your amp.

Find the RMS wattage of your speaker and your amplifier. And try to match them. You should only bridge your amplifier if it is half or less than half the RMS of your speaker.