enough power?

[jurmongler]

i have one quantum 12 inch 250 rms 500 watt, and 1 american pro 12 inch sub 250 rms 500 watt dual voice coil. will a quantum 220x2, 440x1 amp power these and how to wire them sequence or parallel?

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[jurmongler]

someone has to know. i guess what im saying is do you add the rms power togather 250+250 or do i just need 250 watts to power the both of them?

 

[n2audio 5,000+ posts]

it's typically a bad idea to try to run two subs that aren't identical, and having one SVC and one DVC makes it even worse. Pick the one you think is the best, find an amp capable of powering it.

 

[tru_44 10+ year member]

don't run different subs

 

[jurmongler]

so i will can the american pro and get another quantum but this goes back to the same question will a quantum 220x2 440x1 amp power two 12 inch 250 rms 4 ohm svc subs?

 

[indosia 10+ year member]

You can't run 2 different subs, they will cancel each other out. Sell 1 of them. 440 watts will power 2 250watt subs no problem. You could even run 3 of them.

 

[XanderMoser 10+ year member]

You can't run 2 different subs, they will cancel each other out

No.

You make me laugh. But you're still wrong.

Now as to the original question...

What impedance are those amp ratings at? 4 ohms?

You can run the subs just fine off the amp, one sub off each channel. That way you don't have to worry about your amp being 1 ohm stable. 220 watts on a sub that is rated to 250 watts will be just fine. You never know what amps actually make or what subs can actually handle anyway (without a birthsheet), so it's close enough. 30 watts out of 250 will be a negligible difference.

 

[shortyg83 10+ year member]

You can't run 2 different subs, they will cancel each other out. Sell 1 of them. 440 watts will power 2 250watt subs no problem. You could even run 3 of them.

everything this guys said is wrong.

1. 2 different subs will cancel everything out- Not really unless you have them out of phase. It will cause the amp to most likely power 1 subs more then the other and can damage the subs.

2.440 wat will power 2 of the subs-ok so this is tech true as long as you set the gains correctly but you should be using more like 600watts or more.

3.you could even power 3 of them- unless your amp is 1 ohm stable which I doubt then this will eventually fry your amp

 

[indosia 10+ year member]

1. Using 2 different subs is same as being out of phase.

2. If you have 3 dual 4 ohm subs you can wire them so the amp sees 4 ohms. Need 1 ohm stability?

My reference 500 is on ebay right now. Rated @12 volts -500 watts(rms) into any load down to 1/2 ohm stereo or 1ohm mono. Dual descrete class A drive stages. Power supply is unregulated- way more power at 13-14 volts. AUction ends in 14 hours.

 

[XanderMoser 10+ year member]

1. Using 2 different subs is same as being out of phase. 2. If you have 3 dual 4 ohm subs you can wire them so the amp sees 4 ohms. Need 1 ohm stability?

My reference 500 is on ebay right now. Rated @12 volts -500 watts(rms) into any load down to 1/2 ohm stereo or 1ohm mono. Dual descrete class A drive stages. Power supply is unregulated- way more power at 13-14 volts. AUction ends in 14 hours.

1. No. Again. It is not the same at all whatsoever. Whoever told you that doesn't know anything about speakers.

2. No Again. You cannot get 4 ohms from 3 DVC 4 ohm subwoofers. It's mathematically impossible. Do you want me to do all the math for you?

Let's put all of the coils in parallel, on each sub. Now you have 3 2 ohm subs. You can now make nominal impedances of 6 ohms (series), 0.667 ohms (parallel), or other impedances with combinations of series and parallel. But any mismatch combinations will not distribute power evenly to the subs.

Now let's put all of the coils in series, on each sub. Now you have 3 8 ohm subs. You can now make nominal impedances of 24 ohms (series), 3.07 ohms (parallel), or other impedances with combinations of series and parallel. But any mismatch combinations will not distribute power evenly to the subs.

If you buy that amp, you will not be able to use your amp in stereo. You have to use it in mono. But since it's .5 ohm stable stereo, you can do the 3.07 configuration, and put it on the amp while its bridged. Then each channel will see about 1.5 ohms. Perfectly safe for that amp. And each sub will see about 166.7 watts. Under the rated amount though, so don't clip the amp.

But why did you even mention 3 DVC 4ohm subs? You don't even have 3...

 

[Stel 10+ year member]

Using two different subs will not cancel but you could have some unusual distortion doing this. I would just get two of the same.

The RMS rating for dual voice coil subs is the total rating. The impedance rating is per coil. An amp that can do 220rms into a 2 ohm load is an ok match for a 250rms dual 4 ohm sub (with the sub wired in parallel for 2 ohms).

 

[indosia 10+ year member]

2 different subs mounted side by side are not working together to produce 1 sound wave. They are producing 2 different sound waves that will interfere with each other. They are not in phase...........Your right i meant 3 dual 6 ohm subs can be 4 ohm sorry.................. Trust me 166 watts will power a 250 watt sub no prob. If your car puts out 13-14 volts it will be more like 200 watts per sub as the amp is rated @12volts

 

[Stel 10+ year member]

2 different subs mounted side by side are not working together to produce 1 sound wave. They are producing 2 different sound waves that will interfere with each other. They are not in phase...........

If they're wired in phase they will be in phase, if wired out of phase then they will be out of phase, it has nothing to do with the brand or model.

 

[indosia 10+ year member]

Running 2 different subs is wrong! Running 2 identical subs is right. And running 3 identical is very right

 

[XanderMoser 10+ year member]

Running 2 different subs is wrong! Running 2 identical subs is right. And running 3 identical is very right

Please go to http://www.bcae1.com and learn something before telling people what you think is right.

Phase has nothing to do with brand or type of sub. Phase is the timing of the power that is being sent to the sub, to put it simply. Subwoofers move in and out. When using a single amp, no matter what sub it is, as long as they are hooked up the same, they will move in and out at the same time. That means they are in phase. I'm not saying it will sound good, because mixing brands is likely to sound like poo. Distortion, yes. Out of phase, no.