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Thread: Dual Voice Coil Subwoofers
11-24-2009, 12:16 PM #1
Dual Voice Coil Subwoofers
Okay, time for another newbie question. I am going to use the 5th channel on my Kicker ZX700.5 to run the subwoofer. This channel puts out 210w rms at 4 ohms and 420w rms at 2 ohms. So to get the most out of the amp, I am thinking of replacing my current Polk/MOMO single voice coil 4 ohm sub with something that can be configured for 2 ohm operation. I see that they sell dual voice coil (DVC) 4 ohm subs and DVC 2 ohm subs. I know that I can wire the voice voils in parallel on a 4 ohm DVC sub so the amp sees a 2 ohm load. But my question is, should I go that route or should I buy a 2 ohm DVC sub and just use one voice coil. Will the sub perform better if both voice coils are being used (i.e., buy the 4 ohm DVC and wire the voice coils in parallel). I really don't know how these subs work, as you can tell.
The best bang for the buck 4 ohm DVC that can handle about 400w rms seems to be the Kicker CVR104 (about $75 shipped) - anyone have experience with this sub?
I was really liking the Boston Acoustics G310-44 ($110) until I read that it has a foam surround. Doesn't seem like that would hold up very well over time.
Your thoughts/suggestions are appreciated.
2006 Mobius LSV
11-24-2009, 01:40 PM #2
I have the 4ohn Duel VC on my Sub you herd yesterday Al. The Duel voice coil subs will have a very different sound if you only run 1 coil. Its designed to have both oils running. Its like 2 speakers in 1. You could run a 2 channel amp to the duel voice coil subs and it would sound good. The ability to wire the coils together to lower the ohms allows the amp to work and twice the capacity. 200W Vs 400 watts.
I dont know all the details of the way it works but this is how i understand it. Maybe Razz, Newty, Brian can explain it better.
My money is get the 4ohm duel voice coil and make the 700.5 push is at 2ohm load.Malo <--- Means--Evil or Mean One. This explains a lot.
2013 Mojo 2.5 Skylon Tower. Bestia < Beast >
11-24-2009, 02:15 PM #3
If you decide to buy a new sub, a DVC 4 ohm sub wired in parallel would be a good way to go. Just to be clear, the dual voice coil just gives wiring flexibility and doesn't make it a better performing sub. So for example, there would be no real difference between a single 2 ohm coil sub and a dual 4 ohm coil sub wired in parallel.
I have never used a Kicker CVR sub, but I do know it is their entry level line. If you are going to upgrade, my advice would be to spend a little more and get something that you know will be noticeably louder in the end. Just getting more power from the amp won't necessarily result in a better sounding setup unless your sub is currently way underpowered.Dan
08 LSV Mods
11-24-2009, 02:22 PM #4
good advice ^
the only real reason to buy a dvc 4ohm sub would be if you plan on adding more down the road, it can give you a little more flexibility, such as running it to 8ohms, then adding another wired in for a total 4ohm load. you will find that some speaker lines only offer one or the other, so you have to take what they have for sale..
have heard a lot of good things about the kicker cvr. lots of guys are using the solobaric subs as well. you need to ensure that whatever sub you buy has a box that is optimized for it. simply replacing a sub with one that offers more power out of the amp may be defeating the purposes if the box is not designed for the sub.
sometimes you are better off with an optimized sub/box combo and a little less power than a ton more power and a box/sub that don't work well together.'06 Supra Launch 20SSV-gone but never forgotten
11-24-2009, 02:43 PM #5
You could potentially damage a dual voice coil woofer by wiring only one of the coils. You would be inordinately working one coil with half the overall thermal capacity.
The Polk MOMO sub is very anemic in a sealed enclosure but will sound absolutely great in a bass-reflex enclosure. I've never experienced another woofer where the performance was so polarized. In a bass-reflex enclosure you would get roughly the same output with 200 watts as you would have in a sealed box with 400 watts. So if you're sealed now, then give this some consideration.
You're correct that a dual 4-ohm in parallel is the way to go in order to draw the full output from your amplifier. Also, I totally agree with all of Brian R's comments. Very good points.
11-24-2009, 04:03 PM #6
Thanks everyone, great info as usual.
The sub is in a footbox that is essentially open on one end so it's basically operating in almost a free air state. I was going to try and seal it up but I think I will try to make a ported enclosure out of it per your comments. If after that it seems like it's not hitting hard enough, then I may try something that presents a 2 ohm sub to the amp.
2006 Mobius LSV