Does a amp automatically reconize a 2ohm sub?

[mdsniper7 10+ year member]

I hope Im saying this right I have a boston aucustics gta 1105 5 channel amp and I am wondering it says 400 rms at 2 ohms or 250 at 4 if I hook up a 2 ohm sub to it does the amp automatically reconize it and adjust or do I have to change anything.

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[mylows10 5,000+ posts]

yes ,it recognizes the ohm load

 

[audioholic 5,000+ posts]

I hope Im saying this right I have a boston aucustics gta 1105 5 channel amp and I am wondering it says 400 rms at 2 ohms or 250 at 4 if I hook up a 2 ohm sub to it does the amp automatically reconize it and adjust or do I have to change anything.

Ohms is a measure of resistance. The amplifier has a specific 'pushing force' (watts), but how much the object that is being pushed resists this force (ohms) directly affects the over all work created (final wattage produced). Knowing this, lets pretend you have 2 boulders to roll up a hill. One boulder is twice the size/weight of the other. Your question about amplifier wattage is similar to if you would ask if your muscles would recognize the weight difference between the two boulders. There is no 'recognizing', the amp simply pushes, and the speaker resists. So like mylows10 said, no, the amplifier does not have any setting that needs to be changed to operate at a specific ohm load. Much like your muscles push each boulder with the same force, but the weight differences mean the over all speed you are able to roll each boulder will automatically change.

Hope that helps.

 

[naughtyca 10+ year member]

the only thing you need to do is to wire it correctly what ever your final ohm load the amp will see and will play as long as the amp is stable for it. most amps are stable on 2 ohm