Quick Question about wiring

[02celica]

Ok so i got a quick question.. ive got a mono block amp 500 rms @ 2 ohms and 1000 watt peaks. Well im getting another sub so i can wire it at 2 ohms (the subs are dual 2 ohm) so im guessing ill be running 1000 watts rms (500 rms @ 2ohms x 2 sub) right? Well if i am will i have to upgrade my wire to 0/2 gauge? i have 4 right now. And the subs rms are 500 watts btw

*crosses fingers for no* :(

[NDSbass]

someone correct me if im wrong but if you are wiring the speakers together, in parrallel or in series, you are only running 250w rms to each speaker

check this guide http://www.termpro.com/articles/spkrz.html

your amp wont output more power because of more speakers, so you should be ok with gauge 4

also make sure you wire your subs like this if they are both dual coil 2 ohm

http://images.cardomain.net/sites/sounddomain/shop/woofer_wizard/2_2ohm_dvc.gif

hope that helps

[02celica]

Yea.. i was looking at that wiring guide on cardomain too.. but the amp puts out 500 rms @ 2ohms.. .. so it puts out 500 from the terminals correct?? So if i wire both subs up to the terminals ill be getting 500 to each sub correct?

[NDSbass]

from the guide i linked you to
[QUOTE]Power Calculations
Whenever you connect more than one speaker to an amp channel, it's important to gauge what effect the speakers will have on the amp and each driver in the chain. In other words, how much power will the amp deliver into each channel given the equivalent-load impedance you've created? And how much power will each speaker in the chain receive? Answering these questions will help you to avoid costly damage to your amp and speakers.

Referring back to the hypothetical subwoofer installation outlined above, we know that the amplifier in question is rated to deliver 100 watts x 2 into 4 ohms. To find out how much power each channel of this amplifier will deliver into the resulting 8-ohm load, we must solve Equation 2, in which Po is power output, Pr is the amp's rated power, Zr is the impedance the amp's output power is rated at, and Zt is the equivalent-load impedance for each channel:

Equation 2: Calculating Output Power
Po = Pr x (Zr / Zt)

Plugging in the appropriate numbers, the calculation is worked through as follows:

Po = 100 x (4 / 8)
Po = 100 x 0.5
Po = 50 watts

Now that we know each amplifier channel will deliver 50 watts into an 8-ohm load, we can figure out how much power will be applied to one of the subwoofers

[02celica]

See but in this article (im only at the middle of speakers in parallel) they are talking abuot a 2 channel amp.. and im using a single channel amp. So im guessing it would be different?

Edit: and im still not getting this damn equations **** :(

[NDSbass]

ok here it goes

car domain wires teh speakers in parrallel and in series

each speaker has two voice coils, each rated a 2 ohms

the two voice coils are wired in series, producing a 4 ohm load total for each individual speaker.

then the two speakers are connected in parrallel to create the 2 ohm load you see at the amp

to find the power to each speaker, you take the total power (PWR) and multiply it by the load at the amp (AMP) divided by each speakers impedance(SPKR)

so it looks like this

pwr (amp/spkr)= power to each speaker

so lets plug in the numbers

pwr=500 watts at 2 ohms from the amp
amp= 2 ohm load
spkrs= 4 ohm load caused by the dual voice coils wired in series

500(2/4)
500*.5= 250w

so the way i figure each speaker will recieve 250w

but dont be discouraged, just because each speaker is recieving less power doesnt mean it is quieter. sound is all about air pressure, and the more speakers you have moving the more air pressure, so you will feel gains with two speakers running lower wattages vs. one speaker running a higher wattage

hope this helps, if anyone finds anything wrong with any of this let me know

[02celica]

Yea but i was told by my friend whos really good with sound system that underpowering the sub (lower then rms) is bad for it.. and is worse then overpowering it :( :'(

Wait.. im wiring the subs in series and parallel.. sooo wouldnt that put the independence at the sub at 2 ohms? so wouldnt it look like this:

500(2/2)
500*1
??

i think i read that wrong nvm+

[NDSbass]

the amp is seeing each of your subs as 4 ohm, not 2 ohm because the coils are wired in series.

if the amp was seeing your subs as 2 ohm, and then you were wiring the subs together in parrallel, your amp would be seeing a 1 ohm load, which would blow it

Yea but i was told by my friend whos really good with sound system that underpowering the sub (lower then rms) is bad for it.. and is worse then overpowering it

sorry im still very new to sound systems, dont even have subs in my car yet. i couldnt tell you either way. maybe someone else from the board can help out

[SickCelica696]

Yes unpowering is bad and destroys the woofer. You either need a new amp or different subs. Or give us more info such as what you actually have so we can go from there

[02celica]

Sub:
http://www.cardomain.com/item/ORI27201
Amp:
http://www.cardomain.com/item/PIOGMD510M

****..new sub sounds like it would be easier!

[02celica]

This one would work right? without having to buy another sub :-\

http://www.cardomain.com/item/ORI27207

gah thats expensive :(

[NDSbass]

new subs would probably be cheaper, but if you want it to be louder, you could get a new amp and just one new sub. also have you been buying from car domain? i tend to find them a little overpriced, from what ive heard www.sonicelectronics.com is better and usually cheaper.

if you got a 1000w rms amp, you would be pushing 500w to each sub :drool: of course that also has its downsides. more money and you may need to get lower gauge wires

[02celica]

new subs would probably be cheaper, but if you want it to be louder, you could get a new amp and just one new sub. also have you been buying from car domain? i tend to find them a little overpriced, from what ive heard www.sonicelectronics.com is better and usually cheaper.

if you got a 1000w rms amp, you would be pushing 500w to each sub :drool: of course that also has its downsides. more money and you may need to get lower gauge wires


Well i like cardomain cuz i get it next day if i order before 5 :) and no way in hell im running my damnn wires again.. F that. Ill just get a new sub

[NDSbass]

wait your only gonna get one? im confused

[02celica]

I think it would just be easier to get a new sub.. that i can wire at 2 ohms. with only 1 sub :)

[SickCelica696]

Yea I think their info is wrong. They list a bridged output but its a single channel amp.. therefore there is no bridging..

It really puts out 600w @ 2ohms or 300 @ 4ohms. So you'd have to wire each sub to 1 ohm and then run them in series to make a 2ohm load.

[2way]

This is a simpler read for you w/calculators for impedence: http://www.bcae1.com/spkrmlti.htm someone correct me if im wrong You are correct.

[02celica]

http://www.cardomain.com/item/ORI27207

So this sub would be good right?

[NDSbass]

So this sub would be good right?
im confused whats the difference between that and the one you have now?
the only thing i see is the coil impedance is 4 ohm, which would be an 8 ohm impedance for the speaker total

an 8 ohm speaker wired in parrallel with the 4 ohm speaker you have now would be a 2.6 ohm load at the amp.(i think)

that means your amp will be pushing less than 500w since thats at 2 ohms

then if you split that between your speakers, your still not getting the recommended rms of the subs, in fact your getting less then two 2 ohm dual voice coil subs

if you wanted to get new subs, im pretty sure you would have to get two with an rms of about 250w and a load of 2 ohm at the amp

or you could get one amp and one sub, a 1000w rms amp and another of the same sub you have.

did i miss something?

[02celica]

they way your saying is that my current sub is at 2 ohms.. but its not its at 4.. i called best buy and they said i need a dual 4 ohm sub and wire it have it wired like normal then running a wire from the one connect pos to the other pos and same with neg :). creating a 2 ohm load>

edit: you can also look at their wiring diagrams for each sub :)

[NDSbass]

ok im a little confused now. you have one sub currently, right? and you want to get another one?

no matter how many ohms you have at the amp, if you have more than one sub hooked up your subs will not each recieve rms. they will only recieve half, or about 250w, which is below the rms of the subs you have posted. and like you said before, underpowering the sub ruins it, right? werent you getting another sub to get rid of that problem?

they way your saying is that my current sub is at 2 ohms.. but its not its at 4..

its a 4 ohm dual coil sub or its a 4 ohm sub when everything is wired the right way?

[2way]

So this sub would be good right?
Just guessing... but if you're gonna go single sub... you'd probably want larger than 10"...

[02celica]

Just guessing... but if you're gonna go single sub... you'd probably want larger than 10"...

Its all i can fit in the box i have.. lmao i dont feel like buying a bigger box.. unless i can sell some of my stuff and get loads of cash.. cuz the 12 inch verison of that sub is 20$ more and a box is gonna be like what 40ish? thats 210$ and i dont have that avaliable right now :(


NDSBass.. ok click on the link i posted for the sub.. and go to wiring options.. to the right.. it shows ya how to wire it up to 2 ohm.. im taking my current sub out..