ohms?

[iceiso]

what is the significance of the ohms of an amplifier? amps specs that i see put out more power at a higher ohm. why is that?

also, what is bridging?

thanks for any replies/help!

[strodda]

because there are different types of speakers. for example my subs are dual 4ohm(dual voice coil sub). the amp running them is stable at 4, 2 and 1ohm. at 4ohm-400watts, 2ohm-600w & 1ohm-800w. since the rms wattage of the subs combined is 1000w, i would want to wire them to take full advantage of the 800w@1ohm. so i wired the coils of each sub in parallel, turning the dual 4ohm load into two single 2ohms. then wired the pair of 2ohm in parallel to create a 1ohm load.


bridging is capable when you have an amp with 2 channels or more. say for instance you have a amp thats rated at 75x2. you would wire a speaker to the + of one chan. and the - of the other... and the output would be 200x1. and that i know of, after bridging an amp its only stable at 4ohms.

[PaulD]

ohms is a measure of resistance to the flow of electricity. The lower the ohms (load), the more power an amp can put out - all other things being equal. Lets go thru a little example, electricity flowing thru a wire is a lot like water flowing thru a pipe. Voltage acts just like pressure in the water pipe and current is like measuring the gals/min of water flowing thru the pipe. Putting a resistor into this would be like pinching the pipe or water hose ...... the bigger the resistance, the more you would have to pinch the pipe. Remember that power is equal to volts X amps, so if you slow the flow by "pinching" the line - the total power will be less, the more it's pinched or blocked, the less power is delivered.