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    Why 4 awg power, and 16awg speaker wire?

    Ok, as the title sez...i've been wondering this for a while. Hopefully learn yet another thing from you geniuses here. Why? Why run 4awg power wire, and then run 16awg speaker wire...j/w. It doesn't make sense to me just thinking about, the only wires connecting the sub to the amp are the speaker wires...so the speaker wires are the actual wires giving the sub the power right? so if it's a 1000 watts rms amp, then the speaker wire is giving the subs 1000watts...so y is the speaker wire considerably smaller than the power wire. Maybe i'm just an idiot, ah ha...does it have more to do with current?? please inform me, thanx...peace

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    The wire from the subs to the amp carries the signal, the wire from the battery to the amp carries power.



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    Re: Why 4 awg power, and 16awg speaker wire?

    Originally posted by ngsm13
    Ok, as the title sez...i've been wondering this for a while. Hopefully learn yet another thing from you geniuses here. Why? Why run 4awg power wire, and then run 16awg speaker wire...j/w. It doesn't make sense to me just thinking about, the only wires connecting the sub to the amp are the speaker wires...so the speaker wires are the actual wires giving the sub the power right? so if it's a 1000 watts rms amp, then the speaker wire is giving the subs 1000watts...so y is the speaker wire considerably smaller than the power wire. Maybe i'm just an idiot, ah ha...does it have more to do with current?? please inform me, thanx...peace

    NG
    or maybe for amps, DC in, AC out?

    current and voltage is a different thing, and I think the current dictates the wire thickness.



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    Originally posted by Gauntlet
    The wire from the subs to the amp carries the signal, the wire from the battery to the amp carries power.
    well how does that 1000watts get to the subs....the speaker wire right? i really don't know. peace

    NG




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    Originally posted by ngsm13
    well how does that 1000watts get to the subs....the speaker wire right? i really don't know. peace

    NG
    yeah, it gets through the wires...but I hardly think the amperes go through directly either. AC power doesn't need a lot of amps. I think that's how it works.



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    Originally posted by Gauntlet
    The wire from the subs to the amp carries the signal, the wire from the battery to the amp carries power.

    the spk wire carries the signal, but if there'snt enough juice going into the amp, tehn it wont produce the 1000watts. and 16awg wire, hmmm, i think i used 14 until i changed the 12 now. it's just a better free flowing signal (for both of them, think of a pipe, if a pipe has a 1'' diameter and you use it to flow water out of a tank full of water, then the flow will be slow and wont be able to carry as much at a a time. now if the pipe has a 4'' diameter, then better flowing, n more easy going)

    u get my point tho. i mean, if u insist, just run 12awg power n 24awg speaker wire on a 1000watt system, and see if there's any diff.



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    Originally posted by Matador
    the spk wire carries the signal, but if there'snt enough juice going into the amp, tehn it wont produce the 1000watts. and 16awg wire, hmmm, i think i used 14 until i changed the 12 now. it's just a better free flowing signal (for both of them, think of a pipe, if a pipe has a 1'' diameter and you use it to flow water out of a tank full of water, then the flow will be slow and wont be able to carry as much at a a time. now if the pipe has a 4'' diameter, then better flowing, n more easy going)

    u get my point tho. i mean, if u insist, just run 12awg power n 24awg speaker wire on a 1000watt system, and see if there's any diff.
    i know, i understand now...and i know the concept of why the power wire is larger and i also know about current and resistance. BUT, thanx for every1's help...i was just saying y run 4 awg power wire and not speaker wire...but i got it now, much less current...peace

    NG




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    Originally posted by paikiah
    yeah, it gets through the wires...but I hardly think the amperes go through directly either. AC power doesn't need a lot of amps. I think that's how it works.
    Exactly. The AC is 120V (I guess this is how it works...), so to get, say, 1200W, it only needs 10A. So it doesn't need nearly as thick a wire to carry the power.



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    Originally posted by Matador


    u get my point tho. i mean, if u insist, just run 12awg power n 24awg speaker wire on a 1000watt system, and see if there's any diff.
    thats a baaaaaad idea. 12 ga power? your "pipes" would "burst" and water will get all of your car. and instead of pipe, burst, and water, i mean, wire, burn and fire. lol...



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    Originally posted by fantomas
    thats a baaaaaad idea. 12 ga power? your "pipes" would "burst" and water will get all of your car. and instead of pipe, burst, and water, i mean, wire, burn and fire. lol...
    ...but by which time, the inline fuse should've blown....

    (this reminds me of the three word post some time back of the ol' wh0rin' days



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    amp output cant be 110volt, if it was and you held the spkr wires, and got even close to 10 amps, you woud die of electrocution. higher current/amperage does need larger wire.
    I have 4 ga power wire and am going to double run 12 ga or find some 10 ga wire.



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    Originally posted by tyranis
    amp output cant be 110volt, if it was and you held the spkr wires, and got even close to 10 amps, you woud die of electrocution. higher current/amperage does need larger wire.
    I have 4 ga power wire and am going to double run 12 ga or find some 10 ga wire.
    double the 12 and 10 for speaker or power?

    I don't know if you know this, but 2 X 8gauge doesn't mean it's gonna carry as much as a 4gauge. (www.eatel.net)



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    Re: Why 4 awg power, and 16awg speaker wire?

    Originally posted by ngsm13
    ...does it have more to do with current?? please inform me, thanx...peace

    NG
    Yes. It's really quite simple.. wire size depends on the current.

    Current = Power/Voltage

    1000 watts at 14 volts (DC input power) = 71.4 amps. Use 4 gage. Actually this could be more than 71 amps because of the efficiency of the amp.

    Current is also = sq rt of Power/Resistance

    1000 watts into 4 ohms = 15.8 amps. For that I'd use 14 gage, possibly 12.
    1000 watts into 2 ohms = 22 amps. Definitely 12 gage, maybe 10.

    16 gage is adequate for 8 amperes, which would be up to 250 watts with 4 ohms. Good enough for most main speaker installs.

    The losses in wire also depend on the length. You can get away with smaller wire on a 12" span than on a 20 ft run.



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    maylar, so in the case of a subwoofer with a 1500W RMS amp would mean that the subs would require about a 8 gauge? wow...



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    you guys hit on the reason before, the output on the amp is AC current, I dont think it is 110 like a house, but it is higher that the 14.4 comming from your alternator. Think about how many appliances you run off an outlet at your house, yet that is only 12 gauge. Despite all that, I always run the largest wire the terminals will accept (i had 8 guage run for 600 watts going to a w7).....its so cheap, why not do it.



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