What will happen to a 4 channel amp if you bridge the channels and run it at 2ohm. I hear you guys say that it is unstable, but what exactly will happen? Will it start frying stuff inside the amp? Will it overheat way fast? Will it just sound bad? What exactly happens? Just curious..

 

it all depends on the amp really. the power it put out (not the rms but the constant, most ppl dont realize that the rms isnt what is pushing all the time) if the amp can support 2 ohm stable bridged out from 4 channels to 2 then go for it i would not reccomend turning the gain all the way up though (risk blow either the amp or the subs)

 

When running an amp bridged, each channel (need 2 channels to bridge) will see half the load that you connect to it. In this case, each channel will see 1 ohm. Each channel will put out 2x as much power (current) as it was designed to put out at 2 ohms, and the power dissipation in each channel will double. If you keep the gains low enough, the amp should run just fine, as long as you don't exceed the current or thermal limits. If you exceed either, you will fry the output transistors.

If you keep the gains low enough to safely run the amp, you will only get as much power as you would from a single channel.