Ohms and Wiring
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=8159
Printed Date: May 09, 2025 at 8:47 PM
Topic: Ohms and Wiring
Posted By: dem622
Subject: Ohms and Wiring
Date Posted: January 14, 2003 at 9:42 PM
Hey all, My subs say that they have dual 4 ohm voice coils...so would that mean that the total ohms of each sub would be 8? If so, then by using the calculator the lowest ohms I could go using either parrallel wiring or by bridging the amp would be 4 ohms? I'm just trying to figure out how all this works, so I would greatly appreciate any help you could give. Dennis P.S. I'm not sure if this matters in the context of the question but I am using: (2) 12" Memphis Power Reference Subwoofers (DVC) 200 watts RMS/400 Watts Max Kenwood 1000 Watt amp/ 150 x 2 at 4 ohm/ 230 x 2 at 2 ohms, stable at 2 ohms
Replies:
Posted By: wvsquirrel
Date Posted: January 14, 2003 at 10:08 PM
4 ohm DVC means each voice coil is 4 ohms. I believe with 4 ohm DVC's you can wire them to a 1 or 4 ohm load with 2 subs. I don't know if your amp is 1 ohm stable (based on what you've written it isn't), so I would suggest wiring to 4 ohms. ------------- Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
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Posted By: wvsquirrel
Date Posted: January 14, 2003 at 10:19 PM
S1C1=Sub1 Coil 1, S1C2=Sub1 Coil2, S2C1=Sub2 Coil1, S2C2=Sub2 Coil2. Each will have a + and - associated with it.... Wire the following together: Amp+, S1C1+, S2C1+ Amp-, S1C2-, S2C2- S1C1-, S1C2+ S2C1-, S2C2+ Look here for a diagram: https://www.rockfordfosgate.com/rftech/wiringwizard/index.asp?WoofQty=2+woofers&WoofImp=Dual+Voice+Coil+-+4+ohms+x+2&image.x=23&image.y=7 For a 4 ohm load you would want Wiring Option #2 ------------- Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com
Posted By: the12volt
Date Posted: January 14, 2003 at 10:22 PM
With a single DVC woofer at 4 ohms per voice coil, you can wire the voice coils in series to get 8 ohms or wire them in parallel to get 2 ohms. If you have two DVC woofers at 4 ohms per voice coil, they can be wired to get a 1, 4, or 16 ohm load (mono).
Posted By: dem622
Date Posted: January 14, 2003 at 10:33 PM
Thanks for the replies... Well that dissapoints me, when I bought this stuff I had no clue on matching stuff up, so now I can only send 150 to each sub. If I had known that I couldn't do 2 ohms, I would've gone a different route. Ah well, they still hit pretty hard at 4 ohms (the way its set up now).
Posted By: wvsquirrel
Date Posted: January 14, 2003 at 10:43 PM
Crutchfield is running a special right now on a Rockford Power 500bd mono amp, 2 HE RF3412's (4 ohm SVC), and a Q-Logic enclosure. I don't need the enclosure, but their prices on the special are pretty good. Their specs on the 500bd are wrong though, its a 500 watt amp, but it's 300x1 at 4 ohms, and 600x1 at 2 ohms (straight from Rockford), not 250x1 and 500x1 as they claim. I currently have the same setup with a different enclosure. They claim it's a 140db setup. If I pay the money to double what I currently have, OMG! Of course I'd need another CAP and probably another battery as well. ------------- Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com
Posted By: dem622
Date Posted: January 14, 2003 at 11:05 PM
Well, the next thing I'm probably going to get is some good 6.5 component speakers. Right now, I'm pretty much going for the Kicker Resolution series component set (I got some crappy Pioneer stuff right now), but until I pay for my tuition and books for school, it'll just be a dream... Dennis
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