how should i wire these subs?

Hi!

I own a monoblock with 2 speaker outputs. I have 2 subwoofers but they are different, one is a Vibe SVC 4 ohm and the other is a Pioneer 4 ohm DVC. How should I wire them up to get the lowest impedance as my amp is 1 ohm stable.

I have already joined the two voice coils on the pioneer in parrallel so its now 2 ohm. Should I now wire it to one of my speaker outputs the the vibe to the other speaker output?

Or should I join the 2 subs in parrallel then wire them to one speaker output?

Thanks.

The connections to the terminals are in parallel inside the amp anyway. You can use both sets... Put the 4-ohm woofer on one, and the 2-ohm woofer on the other.

The 2-ohm woofer (parallel wired 4-ohm voice coils) is going to demand twice the power of the 4-ohm woofer. The total impedance will be perfectly safe for the amplifier, but the 2-ohm woofer will likely be louder. I can only tell you that there is NO way to get an optimal connection for the two woofers you have. It won't ever happen. Even if you only use one voice coil on the DVC woofer, (which, YES, you can do...) it'll still be nowhere NEAR optimal with different woofers. Ever.

Get two matching woofers.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Cheers

moham] wrote:

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Cheers

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i see that alot on another forum, im guessing that means thanks? lol
id stick with the dvc sub an leave the other for a back up

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1000 watts of lp, now need sum hp an mids

does the amp an subs rms rating coinside at all? its not a 1200 rms amp an 250 rms sub is it?
oh yeah an "cheers" back at ya lol


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1000 watts of lp, now need sum hp an mids

Yeah cheers = thanks.

The 4 ohm DVC sub is 750W rms and 2000W max Pioneer.

The 4 ohm SVC sub is 550W rms and 1600W max Vibe.

The amp is a fusion amp with 850W at 2 ohm and I think it was either 1200W or 1400W at 1 ohm.

those are sum gd numbers there, id say you got enuff to work both subs an not really tell the diff between the 2, at least not a negative diffrence

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1000 watts of lp, now need sum hp an mids

Thanks Sthrnbmpn

so itll be a 3 ohm load on your amp, not including box rise,

so at 2ohms your 850 then 3ohms would be 625 watts

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1000 watts of lp, now need sum hp an mids

Hmm...Why 3 ohm?

I wired the voice coils on the pioneer in parrallel so that should be 2 ohms, the other sub is 4 ohms.

1/4 + 1/2 = 0.75.

1/0.75 = 1.33ohms!

Where did you get 3 from?

the dvc is 2 ohm
the svc is 4 ohm
when you wire them in parallel it divides the ohm rating in half, rite? i could be wrong

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1000 watts of lp, now need sum hp an mids

Im not sure, all i remember is that when wiring in parrallel:

1/Total Resistance = 1/Resistance1 + 1/Resistance 2

So 1/2 + 1/4 = 1/1.33 = 0.75

I may be wrong aswell, i'll look into it.

But wait lol, if i had two 4 ohm subs they would make 2 ohm right?

So it wouldnt make sense to have a 4 ohm and a 2 ohm making 3 ohm  It should ofcourse be lower than 2 ohm.

sthrnbmpn wrote:

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so itll be a 3 ohm load on your amp, not including box rise,
so at 2ohms your 850 then 3ohms would be 625 watts

the dvc is 2 ohm
the svc is 4 ohm
when you wire them in parallel it divides the ohm rating in half, rite? i could be wrong

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sthrnbmpn, no! Have a peek here: https://www.the12volt.com/caraudio/boxcalcs.asp#par

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the12volt • Support the12volt.com

Ah good, so it is 1.33 ohms, That should definatly be allowing my amp to provide at least 1000watts of rms.

So hopefully my subs arnt being underpowered now

ohm meter will not lie lol, i got a pair of 2ohm dvc kickers an there wired in parallel, they ohm out at 1.3 ohms when it should 1 ohm
both subs are that way,
i wired both subs in series with each other an its a 2.6 final load, go figure im losing amp efficiancy cause i cant get it down to 2 ohms

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1000 watts of lp, now need sum hp an mids

Damn thats a pain lol, you cant get it down to 2 ohm and neither can you wire them in parrallel because it'll go below 1 ohm

Is your amp 1 ohm stable? or just 2 ohm?

ive tried it at .8 ohm an it doesnt last long, not loud anyways lol, so 4 2 ohm dvc's would get me at 1.6 ohms, alpines arent stable that low may be if i didnt have voltage drop it would probly be ok

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1000 watts of lp, now need sum hp an mids

What are your rms values for the subs + amp?

I worked out that with my amp at 1.33ohms, it should be giving out 1275rms, which is alright seeming as my joint subs rms is 1300W.

I was wondering how close are your values if you take into consideration that your getting 2.6 ohms?

sthrnbmpn wrote:

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ohm meter will not lie lol, i got a pair of 2ohm dvc kickers an there wired in parallel, they ohm out at 1.3 ohms when it should 1 ohm
both subs are that way,
i wired both subs in series with each other an its a 2.6 final load, go figure im losing amp efficiancy cause i cant get it down to 2 ohms

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sthrnbmpn, an ohm meter is not accurate in the manner you are using it here. Impedance is relative to frequency. 1.3 ohms is not accurate. Use 1 ohm.

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the12volt • Support the12volt.com

its a alpine mrp-m1000
600 watts @4 ohms
1000 watts @2 ohms
the kicker subs are 12" cvr d2's
they get loud too
even louder with four

i need to check my own math i guess i swear i was closer than that

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1000 watts of lp, now need sum hp an mids

Hmm, so your subs are 400W rms and 800W peak.

So if your running 2 subs at 2 ohm load, then thats 1000W from the amp, giving 500W to each sub.

If you were to get 4 subs, wouldnt it be only giving 250W per sub assuming your still using 2 ohm load?

What would sound better, 2 fairly powered subs or 4 underpowered subs?

(sorry im no expert, I just want to learn from your experiences)

Oh and also wouldnt four DVC 2 ohm subs have to be wired at either 1 ohm or 4 ohms?

So wouldnt you either have to have a 1 ohm stable amp, or you would be seriously underpowering them at 4 ohms?

sthrnbmpn and moham, please read the topics found here: https://www.the12volt.com/installbay/forum_topics.asp~FID~22

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the12volt • Support the12volt.com

My head hurts... Three pages worth of "my head hurts".

Any time you parallel resistances, the final resistance will ALWAYS be lower than the lowest individual resistance in the circuit.

Knowing that, 4-ohms in parallel with 2-ohms can't be three, because 3-ohms is a higher resistance than 2-ohms. Right? Enough of that.

No, four 2-ohm DVC woofers gives you eight 2-ohm voice coils.

You can get MANY impedances; between 16-ohms, all coils wired in series, and .25-ohms all coils wired in parallel. Funky series/parallel combinations can land you on about 16 different totals.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Hi,

Couldn't find any answer to this question but just wanted to know what happens if when wiring a 4 ohm DVC sub in parallel, on the wiring diagram it shows you connect positive from one coil to the other coils positive and negative from one coil to negative from the other coil.

But then it shows that you take a postive from one coil and wire it to the amp and then the negative is wired from THE OTHER COIL.

So what exactly happens if you take your positive and negatives from the same coil?

No difference, it's exactly the same.

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the12volt • Support the12volt.com

i cant believe it took 3 pages to figure this out either......check out all the help links provided on this site, they are actually helpful....

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35 Hertz custom car audio and automotive fabrication

my apologies my face is red, ive read all the stickies before i ever registered,
sum of it stuck an sum of it went straight on thru
theres alot that i think i know an even more that i know i dont know. im just glad sumone stepped in an said "enuff already"

knowledge is a privilage an "im giving it all i got captain"



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1000 watts of lp, now need sum hp an mids

moham] wrote:

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Hmm, so your subs are 400W rms and 800W peak.

So if your running 2 subs at 2 ohm load, then thats 1000W from the amp, giving 500W to each sub.

If you were to get 4 subs, wouldnt it be only giving 250W per sub assuming your still using 2 ohm load?

What would sound better, 2 fairly powered subs or 4 underpowered subs?

(sorry im no expert, I just want to learn from your experiences)

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i know haem said his head hurt on this thread (sorry about that), ill try an wrap this up, an to answer mohams question.

to my ears it was quite a bit louder, an your theory is what i was thinking too, 1000 watts is a 1000 watts no matter how many subs you put on it,
woofer cone area is doubled so im guessing that has sumthing to do with the audible difference, an as you can tell im winging it as i go along
2 subs in the trunk is what i always had then i randomly hooked up 2 in the backseat temporarily, ghetto rigging i know, but im not out to impress anybody, plus im changing my sub setup soon, so i just wanted to hear for myself 4 versus 2.

not much of quality difference going from 4 to 2 but ill have to put a few more hours of listening time on them, an change up my playlist to see if there is any to worry about.

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1000 watts of lp, now need sum hp an mids