Sub wiring explanation
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=28315
Printed Date: June 11, 2024 at 1:30 AM
Topic: Sub wiring explanation
Posted By: tdang81
Subject: Sub wiring explanation
Date Posted: March 13, 2004 at 7:27 PM
ok, i understand how to wire the subs, and i understand how ohm's law work (parallel / series) but what i dont get is why the following configuration for the DVC Series wiring comes out to their respective loads. someone please explain , thanks. 
Replies:
Posted By: tdang81
Date Posted: March 13, 2004 at 7:31 PM
Posted By: tdang81
Date Posted: March 13, 2004 at 7:32 PM
Posted By: DYohn
Date Posted: March 13, 2004 at 7:39 PM
Each of those diagrams refers to several of JL's dual voice coil subs. The "D4" in the model number, for example, means each speaker has two 4-ohm voice coils. The diagram show the various possibilities by model number.
Posted By: ravenndude
Date Posted: March 13, 2004 at 7:42 PM
the "serries" diagram show that they are in serries. You can tell because one of the two coils on each sub is connected in serries (+ to -). in the // diagram on the right all of the +s are connected to the other +s and all of the -s are connedted to the other -s. or if you don't know ... in a DVC sub there are two voice coils (hence the Dual Voice Coil) And the number after the D in the product number (like W3v2-D4) I believe is the resistance for the sub. So the first diagram on the left shows that the two voice coils are wired in serries, if each VC is 4ohms that makes a total of 8ohms (Ohms law for serries is R = R` + R`` + R``` and so on.) First diagram on the right show the VCs wired in parellel so if each VC is 4ohms you have a total of 2 ohms (1/R = 1/R` + 1/R`` + 1/R``` and so on)
Posted By: tdang81
Date Posted: March 13, 2004 at 7:58 PM
right, i understand what dvc means, and what series and parallel means. and i understand what the picture represents, just not how the circuitry works out. to my understanding, for example, if there are two (2) 2ohm dvc subs wired in series... wouldnt the total load be 8ohms? cuz isnt series r1+r2+r3... = rT ? thats what i dont understand. any clarification would be greatful, thanks for the replies Dyohn and Raven
Posted By: ravenndude
Date Posted: March 13, 2004 at 8:12 PM
there are two ohms per voice coil (total = 2 ohms). there are two coice coils per sub (total if in serries = 4 ... 2 + 2 = 4). then there are two subs (4*2 = 8). i hope that helps. Just remember .... is it is DVC 2Ohms that means that EACH VC is 2Ohms, and there are 2 voice coils. So one (1) DVC 2Ohm sub can be wired as 4Ohm (serries) or 1Ohm (//)
Posted By: tdang81
Date Posted: March 13, 2004 at 8:16 PM
ravenndude wrote:
there are two ohms per voice coil (total = 2 ohms). there are two coice coils per sub (total if in serries = 4 ... 2 + 2 = 4). then there are two subs (4*2 = 8). i hope that helps. Just remember .... is it is DVC 2Ohms that means that EACH VC is 2Ohms, and there are 2 voice coils. So one (1) DVC 2Ohm sub can be wired as 4Ohm (serries) or 1Ohm (//)
right, so two 2ohm dvc in series = 8ohm total right? but according to JL, two 2ohm dvc in series = 2ohms ................ why? i dont get it.....  i understand the concept of DVC, but their total load output doesnt make sense to me.
Posted By: ravenndude
Date Posted: March 13, 2004 at 8:23 PM
sry ... i wasn't refering to the diagram when i wrote that. the VCs in the digram are wired in serries making it a 4ohm load per sub. then the subs are wired in // (+ to + and - to - which you already know) so that means 1/RT = 1/4 + 1/4 ... RT = 2 that took me a sec to see.
Posted By: tdang81
Date Posted: March 13, 2004 at 9:07 PM
ravenndude wrote:
sry ... i wasn't refering to the diagram when i wrote that. the VCs in the digram are wired in serries making it a 4ohm load per sub. then the subs are wired in // (+ to + and - to - which you already know) so that means 1/RT = 1/4 + 1/4 ... RT = 2 that took me a sec to see.
AHH yes, beautiful. thanks a lot raven!
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