What exactly is the difference between DVC and SVC and what makes dual voice coils better?

 

im not too educated on that...all i know is that regular subs are SVC...the DVC subs are great...especially when you have 1 strong amp...you can wire anywhere from 2 - 8 speakers to one amp...you bridge the DVC subs a certain way to drop their ohms...i dont know much..but all i can say is that the DVC's..have 2 +'s and 2 -'s...do a search on em..im sure plenty i here have had DVC subs..i had...and i wired the 2 subs together...+ to + then - to -....and powered it with one amp..sounded good as hell...it dont work with SVC though...

its not actually better than SVC...DVC is usually convenient when powering multiple subs...with fewer amps...i recently bought a SVC MTX8000 sub...and opted to get a DVC version of it...and i was told that it would not do me any good..since my amp runs stable at 4ohms...and the SVC version of the speaker runs at 4ohms...if i did get the DVC...wiring it would drop it down to 2 ohms...and the amp wouldnt push it like it should...like i said...DVC is great for multiple subs!

 

DVC normally has more power handling. Besides the fact you have 2 vc's and more install options there is not much of a difference. I would choose based on your amps needs. If you don't have an amp yet, the pick the sub you like and buy an amp that can drive it.

 

For all intensive (<--- read: "real world") purposes, they are essentially equal. The ONLY real benefit (if you want to call it that) of a DVC or even a quad VC sub is flexibility.

DVC subs do not handle more power then a similarly assembled SVC sub.

For example, there are a few SVC IDMAX's floating around out there - IIRC they are spec'ed out the same as the DVC's in the power handling department.

One nice benefit of a DVC sub, is that you can connect two separate amplifiers to it. This comes in handy for the SPL guys who don't have strappable amps.

Remember, you could hook up 100000000 subs to one amp if you wanted, so long as you keep the load in mind.

 

The only difference is flexibilety in wiring.

 

a SVC coil and a DVC will usually have the same coil lengths so power handling is not an issue. also, many tend to think that DVC has an increase in Mms since there are 2 coils. not true.in most cases, there will be no change and if there were any, the changes would be so small that its not even detectable to the human ears.

 

Does SVC use a larger gauge wire than DVC? This is not adding up for me with the coil lenths being the same, but DVC has the same resistance.

What I am saying is if you have an svc 4ohm, and a dvc 4ohm, will the dvc have twice the wire as the svc? Does the svc have lower guage to compensate for increase in power that it has to handle?

I hope this is clearer than mud.

 

in most cases, they will have the same gauge. SVC and DVC have the same length. for DVC, the upper coil number 1 and the lower coil is number 2, obviously. the Re will change a bit, but it will still average out to be the same norminal impedence (one 4ohm coil of a DVC will still have the same, or about the same norminal impedence as a SVC 4ohm). the different with each 4ohm coil is power handling. the single 4ohm coil from the DVC will have about half the thermal handling of the SVC 4ohm
.


take a gas tank as an example. say tank on holds 20 gallons and tank B holds 20 gallons also. then you chop tank B in half to get (2) 10 gallon tanks. now which will have more capacity? Tank A or both of the splitted tank B? you can chop up tank B as many times as you want, but it will have the same capacity as if it was one tank.

same with quad coil subs. same coil length most of the time, but the difference is how long EACH coil is.

 

perfect example, the Cerwin Vega subs... the DVC's and SVC's have the same total power handling, while the DVC handles half as much PER VC.

 

If you follow the gas tank analogy I should end up with 2 2 ohm coils from a single 4 ohm coil right? That is my problem. If total coil length is the same as svc, then the combined coils have to be thicker with two of them there.

Secondly this leads me to believe that power handlings is influence greatly by the motor structure. Since the wire does not appear to be the weak point, the motor should determine maximum thermal handling through heat dissapation.


[Modified by vteg, 7:45 PM 3/26/2003]

 

like they said the only difference is different wiring options. You can't necissarly hook up more DVC subs to an amp.

the wire is the same size. i'm not sure what you don't understand. say a svc is 3 inches long. the dvc version would have 2 coils each 1.5 inches long.

 

remember... the Re changes, but the norminal impedence usually stays the same. the 2003 RE HC has quad .8ohm coils (its Re is .8ohm) but we call it a quad 1ohm as quad 1ohm is the norminal resistance. now if you want to get picky then yes, the resistance (Re) does change when compare SVC and DVC but it shouldn't change as much unless the manufacturer decides to do something else with the coil


[Modified by GSteg, 4:36 AM 3/27/2003]

 

I am sure there is something I am missing here. A given gauge of wire of a given length will have a resistance. This resistance increases linearly with length.

So the dvc wires have to be the same length as the svc wire if we comparing a 4ohm dvc and svc sub for example, but 2x the total wire.

I think what I am getting at, is where is this extra wire going. The total length is the same, but you have double the wire in the same space. When viewed from the top of the pole piece is the mass of wire for dvc thicker?

 

Might be easier for people to follow if you call the "AC resistance" by it's proper term of impedence rather than resistance.. too many people will equate that to measuring it with an Ohm meter and wondering why in the heck it's reading 3.6 and not the 4 Ohms it's suppose to. just thought it might make it easier to follow