why is it reading 8ohms

[king ranch 5,000+ posts]

i have my sub wired to 1ohm it reads 1.3 with resistance at the sub then on the back of the box where the terminals are it reads also 1.3 but then when i connect my speaker wire and connect to the amp and test the ohms at the amp i get a 7.8-7.9ohm reading why is that

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[dman4486 5,000+ posts]

i have my sub wired to 1ohm it reads 1.3 with resistance at the sub then on the back of the box where the terminals are it reads also 1.3 but then when i connect my speaker wire and connect to the amp and test the ohms at the amp i get a 7.8-7.9ohm reading why is that

maybe bad wiring...or connection at the box

 

[king ranch 5,000+ posts]

so should i set the gains to 8ohms or 1ohm

i have it set at 1ohms and its pretty loud i think the sub will blow if i set it at 8ohms

 

[king ranch 5,000+ posts]

bump

 

[maldecido33 10+ year member]

It's because whenever you measure the resistance of your subs when they are connected to the amplifier, you're actually measuring the equivalent resistance of the amplifier circuit and the subwoofers.

 

[ultimate157 5,000+ posts]

..

 

[king ranch 5,000+ posts]

ok so still set the gains going by 1ohm

yes i am reading amps terminals

 

[dman4486 5,000+ posts]

when i check my resistance at the amp, i get the sub's resistance (2ohm)

 

[king ranch 5,000+ posts]

well idk thats odd

 

[dman4486 5,000+ posts]

same with my front channel amp

 

[ultimate157 5,000+ posts]

Two words: Coupling capacitor //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[king ranch 5,000+ posts]

well idk what would cause it to read 8ohms

 

[king ranch 5,000+ posts]

Two words: Coupling capacitor //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

what is that

 

[dman4486 5,000+ posts]

what is that

bullsh!t

 

[ultimate157 5,000+ posts]

what is that

Separates DC from AC.

AC current sees a capacitor as a short (Piece of wire)

DC current sees a capacitor as an open.

When reading resistance with an ohm meter, you are reading the DC resistance of the circuit; however with a coupling capacitor on the output, it should read open.

My Lanzar reads open on the outputs as well.