Question about Infinity Reference 1211a Car Audio Amplifier

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Infinity 1211a @ 2 Ohms

Okay, i have a infinity 1211a amp. Its rated 1,300 RMS watts @ 2 Ohms. I'm thinking about powering a pair of Infinity Perfect 12.1 SVC in 2 Ohms load. Will this give 1,300 RMS watts to each woofer, or to the pair of woofer meaning each sub will share half the 1,300 watts..??..

Thanks,

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  • monkey_flea Jun 03, 2009

    Thanks etirbynnor for your solution, very helpful..Now I know not to overpower the subs..Lastly, how many watts will be going to each sub if I wired them in 8ohm load on w/ the Infinity 1211a..??.

    Thanks

  • monkey_flea Jun 03, 2009

    Thanks etirbynnor for your solution, very helpful..Now I know not to overpower the subs..Lastly, how many watts will be going to each sub if I wired them in 8ohm load on w/ the Infinity 1211a..??. Thanks

  • Israel Adame
    Israel Adame May 11, 2010

    Does the amp say 1300 RMS watts @ 2 ohms per channel or total power?

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Hello monkey_flea, Your subs will share the amp output. And if you are not careful, you'll end up blowing them. The amp puts out 1300 watts RMS at 2ohms, the subs have an RMS power range of from 75-350 watts, and you'll be driving them with 650 watts each. A better power match would be to series the subs to present an 8ohm final load. This will reduce the output power to a level the subs can handle. Or you could buy 2 more 12.1's and connect them series-parallel for a 4ohm load and each sub would still be getting 325 watts RMS, just about the maximum they are rated to handle. Hope this helps.

Posted on Jun 03, 2009

  • Ronny Brite
    Ronny Brite Jun 03, 2009

    Hello again monkey_flea,

    While Infinity does not list an actual rated power into 8ohms, it produces 1300 watts at 2ohms and 854 watts at 4ohms, so it appears that the power would be reduced by about 34% into an 8ohm impedance. Each sub would be getting approximately 300 watts.

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That amp is a true RMS power and it is a type D mono amp, so it will put 1300 watts rms in each speakers, mono amp never share.

Posted on Aug 11, 2009

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