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Old 09-26-2013, 08:00 AM   #1 (permalink)
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Default advice and higher system understanding needed.

to make a long story short. im upgrading my audio system and im looking for some info and understanding of the right way to do this.

i want a 10" and 12" sub both with there own box.

i bought a sub from my neighbor who is sponsored by a sorta local to me audio shop.(he competes in audio comps and does rather well)

the sub i got from him is a 12" hifonics 1200w peak 600w RMS

(heres is were i need help)

so is it important that i get my 10" at 600w RMS? then i have to get a 1200w RMS amp?

or am i able to get for example a 350w RMS 10" and 1000w RMS amp and it all work fine?

also ohms is a problem. the 12" i bought is 4 ohm dvs

would it be best to have a 4 ohm dvs 10" too?

then what ohm should my amp be 1 ohm or 4 ohm?

your help is much appreciated.
thanks.
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Old 09-26-2013, 12:19 PM   #2 (permalink)
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Why do you wanna run 2 different sized subs?
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Old 09-26-2013, 12:28 PM   #3 (permalink)
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just cuz i have a box for them lol.

ive now read its not a good idea so i think im going to go with 2 12" subs.

still unclear about the rms and ohms though.
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Old 09-26-2013, 12:40 PM   #4 (permalink)
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Rms is how much power the speaker can handle continuously.
The ohms is the impedance measurement. You wanna match the rms power and speaker impedance to your amp.

You can wire the speakers to match your amp also.
Check this site out
Basic Car Audio Electronics
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Old 09-26-2013, 01:06 PM   #5 (permalink)
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okay i will check that out. thanks.

so from some other reading ive been doing on crutchfield ive found the best way to do 2 dvc 4ohm subs would be bridge a 2 channel amp and bridge the subs as well.

so if my 2 subs are 600w RMS i would want a 2 channel amp rated at 1200w RMS am i thinking of this correct?
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Old 09-26-2013, 01:49 PM   #6 (permalink)
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You don't "bridge" the subs. Since it's dvc( dual voice coil). You would have to wire it a certain way, either in series or parallel. Or both. For sub amps, mono ( mono meaning one channel), amps would be ideal. So either an amp running at 1 ohm or 2 ohms is what you want to get.

For ex, I have 2 subs that are single voice coil with an impedance of 4 ohms. My mono amp runs most efficient at 2 ohms so I would wire my 2 subs in parallel( neg to neg to neg on amp, pos to pos to pos on amp), that will bring my speaker impedance to 2 ohms, to match my amp.
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Old 09-26-2013, 02:28 PM   #7 (permalink)
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Quote:
Originally Posted by all_rice View Post
You don't "bridge" the subs. Since it's dvc( dual voice coil). You would have to wire it a certain way, either in series or parallel. Or both. For sub amps, mono ( mono meaning one channel), amps would be ideal. So either an amp running at 1 ohm or 2 ohms is what you want to get.

For ex, I have 2 subs that are single voice coil with an impedance of 4 ohms. My mono amp runs most efficient at 2 ohms so I would wire my 2 subs in parallel( neg to neg to neg on amp, pos to pos to pos on amp), that will bring my speaker impedance to 2 ohms, to match my amp.
This

I might also add amps don't always output what they say they do. Example most amps come with a chart when purchased new and display and example like 1000w @ 1ohm 500w @2 ohm [email protected] 4 ohms this basically means if you wire your subs at 4 ohms to the amp the amp is only going to push out 250w this is where a lot of people mess up and wonder why their system isn't banging


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Old 09-26-2013, 03:35 PM   #8 (permalink)
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you could run an amp for each sub but i would scrap the 10 and get an eight inch sub for the sound quality and the 12 for the power
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Old 09-26-2013, 05:19 PM   #9 (permalink)
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Quote:
Originally Posted by all_rice View Post
You don't "bridge" the subs. Since it's dvc( dual voice coil). You would have to wire it a certain way, either in series or parallel. Or both. For sub amps, mono ( mono meaning one channel), amps would be ideal. So either an amp running at 1 ohm or 2 ohms is what you want to get.

For ex, I have 2 subs that are single voice coil with an impedance of 4 ohms. My mono amp runs most efficient at 2 ohms so I would wire my 2 subs in parallel( neg to neg to neg on amp, pos to pos to pos on amp), that will bring my speaker impedance to 2 ohms, to match my amp.
okay thats making sense now. not only wattage but ohms have to match up too.
this is what i meant about "bridging" the subs. but you explained better.



according to crutchfeild 2 channel bridged to 4 ohm and 4 ohm on both subs would be rather slammin lol.

Quote:
Originally Posted by 559civic_dx View Post
This

I might also add amps don't always output what they say they do. Example most amps come with a chart when purchased new and display and example like 1000w @ 1ohm 500w @2 ohm [email protected] 4 ohms this basically means if you wire your subs at 4 ohms to the amp the amp is only going to push out 250w this is where a lot of people mess up and wonder why their system isn't banging



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right. i didnt even think of that. i would have made the same mistake so thanks man.

Quote:
Originally Posted by Juic3 View Post
you could run an amp for each sub but i would scrap the 10 and get an eight inch sub for the sound quality and the 12 for the power
at this point my understanding is subs should be the same size if running multiples.

the sound quality will decrease if done like that.

sound quality can be increased by having good front and rear speakers installed.
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Old 09-26-2013, 09:40 PM   #10 (permalink)
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Good site
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Old 09-26-2013, 10:03 PM   #11 (permalink)
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What are you running for the front end?

Always get as much amp as you can afford or limited by power level by the class you plan on competing in if you do.

Also what car?

Normally two size differences works best when doing a mid-bass and a sub.

6.5 coaxials or components up front, 8" mid-bass firing forward between the front seats from the back (thinking CRX/gutted Civic HB) then a 12-15" in the spare tire well.

Using a 5 channel amp, the fronts would run of channels 1-2, 250 Hz and up, channels 3-4 would run 80-100 to 250 Hz bandpass for the 8" sub, then channel 5 80 Hz and down on the sub.

Crossover points may be different depending on musical tastes.

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Welcome to teamROCS

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