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dvc vs. svc


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oxygen65 
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Posted: October 17, 2006 at 3:56 PM / IP Logged  

do dvc subs hit harder than svc subs? say that i had two 4 ohm svc subs run at 2 ohms and i had two 2 ohm dvc subs both run at the same ohm load on a amp and they are the same exact subs, is the dvc going ot hit harder than the 2 svc?

Flakman 
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Posted: October 17, 2006 at 4:40 PM / IP Logged  

2 (2 ohm DVC) at 2 ohm total on the amp VS 2 (4 ohm SVC) at 2 ohm total on the amp = same result.

The purpose of having dual voice coils is to provide flexibility in hooking up your subs.

The Flakman
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wvsquirrel 
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Posted: October 17, 2006 at 5:18 PM / IP Logged  
Most DVC's are also rated at a higher RMS value then SVC's. So you are able to use a higher power amp as well.
An example is look at the Rockford Punch series:
The P112S4 is a 4ohm SVC rated at 150RMS 300Peak.
A well matched amp would be 300x1@2ohms. (2) subs wired in parallel for the 2ohm load would get apx 150RMS each.
The RFD2112 is a 2ohm DVC rated at 500RMS 1000Peak.
A well matched amp would be 1000x1@2ohms. (2) subs wired in series/parallel for the 2ohm load would get apx 500RMS each.
At one time I ran (2) 4ohm SVC's from a 500 watt amp and it thumped. Then I upgraded to (2) DVC's (the RFD2112's) and used the same 500 watt amp. They did not sound the same nor hit the same. I was not impressed with the way they sounded so I upgraded to a 1000 watt amp that matched the subs rating and it performs beautifully.
So yes DVC's can be made louder then SVC's, but that is only because of being able to apply more wattage (safely).
And Flakman is correct, DVC's allow for more flexible wiring options.
Squirrel
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wvsquirrel 
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Posted: October 17, 2006 at 5:40 PM / IP Logged  
Sorry for the misunderstanding. I wasn't trying to make it seem like all DVC's were rated higher then SVC's. That's why I said "Most" and not "All" dvc vs. svc -- posted image. I was just trying to explain to oxygen65 that not all 2ohm loads will sound the same or have the same audible result. I agree with you, it all depends on the model and brand of the subs.
Squirrel
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Flakman 
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Posted: October 17, 2006 at 7:11 PM / IP Logged  

All things being equal, there would be no difference between the two scenarios.

The Flakman
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wvsquirrel 
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Posted: October 17, 2006 at 7:23 PM / IP Logged  
I agree whole heartedly that the amplifier output will be the same under a 2ohm load. After all the amp only sees 2ohms, it doesn't know if there are 2 or 4 voice coils hooked up to it. But the subs will respond differently, thus producing a different audible affect.
By "all things being equal" are you referring to if the SVC's are rated 4ohm 100RMS and the DVC's are rated 2ohm 100RMS and from the same manufacture and model line? Or are you referring to the fact that the amp will produce the same output at 2ohms regardless? I agree with the latter no questions asked. A 2ohm load is a 2 ohm load. The variance comes with the subs.
It is an imperfect world though, and more than likely he would not be deciding between two identically rated SVC and DVC subs.
Squirrel
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wvsquirrel 
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Posted: October 17, 2006 at 7:54 PM / IP Logged  
Rock on. dvc vs. svc -- posted image.
Flakman:
Please don't think I'm picking on ya, I'm really not. But I just realized that in order for your "all things being equal" to work, the example would be better using 2 4ohm SVC's and comparing them to 1 4ohm DVC.
That way not only is the total ohm rating (2ohms) going to be the same, but so is:
1) The total number of voice coils (2 voice coils for each example instead of 2 voice coils combined for the SVC's and 4 voice coils combined for the DVC's.
2) The ohm rating for each coil will be the same (4ohms per coil)
3) The wiring methodology will be the same for both examples (instead of Parallel for the SVC's and Series/Parallel for the DVC's)
Squirrel
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stevdart 
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Posted: October 17, 2006 at 7:55 PM / IP Logged  
Oxygen, what sub line were you looking at that prompted the question?  It would be easiest, and most accurate, to look at specifics.
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
josh1979 
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Posted: October 17, 2006 at 8:08 PM / IP Logged  

hea some thing to say DVC and SVC subs are not identical othe that voice coil

this is a link to the T/S parameters of a dimond d9 woofers look at the rest of the parameterd some are far from the othes so this tells me that a DVC and aSVC woofer are very diffrent  the D2 in the model # denotes dual 2 and D4 is dual 4 http://www.diamondaudio.com/products/pdfs/D6%20Woofer%20Tech%20Sheet2.pdf

bring back the rotary phone so i dont have to press 1 to proceed in english
master5 
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Posted: October 17, 2006 at 9:44 PM / IP Logged  

Hello again Squirell and nouse. Good to see you all again.

I think you can't really be general with this topic.

First off squirrel, you were comparing 2 totally different models of subs, although they were both Rockfords.

If you go to Rockford Fosgates website and for example check the specifications on the P1 4ohm, and then the P1 DVC you will see that the only difference is the DVC can handle 50watt RMS more and it's 10 dollars more in price.

Other then that they both call for the same exact enclosure specs, sealed or vented.

I can not verify if this fact is the same for other manufacturers , but in this case there is not too much difference other then a little more power handling and flexibility with your ohms load choices.

Peace all.

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