Multichannel amp bridging

[Natejnj]

Hey guys. I am looking into getting a 4 channel amp to run my fronts and my sub. If it were say 125watts RMS on each channel, how much would come from 2 bridged channels? Would it be 250 or something different altogether? Trying to figure out what size sub I would need to get. Thanks in advance.

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[PaulD 10+ year member]

depends on the amp and the load. You will have to look at the specs of the amp you want.

 

[thch 10+ year member]

rule of thumb -- if the amp is bridgable, it will allow for 2x power into a single loudspeaker of 2x impedance.

for instance, 2 channels, 125W @ 2ohm would allow 250W for a bridged channel @ 4ohm.

 

[Saint211 10+ year member]

^ listen to this man, he is right.

Remember, a 4 ohm load bridged on two channel is a 2 ohm mono load.