Varying ohms?

[Bumpin_Ack 10+ year member]

I have (2) 12' Compvr's (2ohm version) and i have them wired down to 2 ohms. The problem is, whenever i turn the gain up, the resistance will drop to ~= .9 and sometimes below. Then when that happens the amp shuts off into protection mode. I am pretty sure its not supposed to be doing that, but could you tell me how to fix?

Amp is Kicker KX600.1

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[Bumpin_Ack 10+ year member]

^bump..anybody...anybody...?

 

[Bill T. 10+ year member]

How can 2-2ohm speakers be wired to 2ohms?

There is your problem, 2-2ohm speakers parallelled is 1ohm, hence why you getting .9 ohm loads at the amp. Unless you can exchange the woofers for 2-4ohm speakers, you will have to series them and give the amp a 4ohm load.

Bill T.

 

[HypnotizeMinds 10+ year member]

How can 2-2ohm speakers be wired to 2ohms?

well.. when you are dealing with more than one DVC subwoofer, more wiring options are available than just series or parallel, such as combinations of the two like series-series, series-parallel, parallel-series, and parallel-parallel. add another sub you are able to wire series-series-parallel...etc any other combo of the two. wiring 2 dual 4 ohm subwoofers together in series-parallel will present a 2ohm load to the amp. im assuming that Bumpin_Ack has wired series-parallel.

about the .9 ohms, i dont know all the specs on that amp but my guess is that it is 2ohm stable? if that is true than there is no reason that the ohmage should drop so low if you have the subs wired like you think you do. my advice would be to double check your voice coil wiring because it sounds as if you have wired parallel-parallel by mistake. it happens. hope that helps u out.

 

[HypnotizeMinds 10+ year member]

***wiring 2 dual TWO ohm subwoofers together in series-parallel will present a 2ohm load to the amp*** sorry. 2 dual 4 ohm in series-parallel would be 4ohms. my apologies. when you say you have the "2ohm version" of the subs, u mean the dual 2 ohm, correct? sorry about that mixup

 

[helotaxi 5,000+ posts]

Impedance varies with frequency. Without seeing an impedance plot for those speakers, you really don't know what you are getting. A perfect example was the original JBL 1500GTi. Nominal 4 ohm speaker but its min impedance as tested by Car Stereo Review was 2.4 ohms and this occured within the usable frequency range of the sub.

 

[EarDrummin. 10+ year member]

Impedance varies with frequency. Without seeing an impedance plot for those speakers, you really don't know what you are getting. A perfect example was the original JBL 1500GTi. Nominal 4 ohm speaker but its min impedance as tested by Car Stereo Review was 2.4 ohms and this occured within the usable frequency range of the sub.

How can the impedence of a wire be changed by a frequency?