shorting a dvc sub
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=114847
Printed Date: April 29, 2024 at 8:45 AM
Topic: shorting a dvc sub
Posted By: spmpdr
Subject: shorting a dvc sub
Date Posted: July 04, 2009 at 10:08 AM
I run 2 12" 4ohm dvc subs as if they were svc 4om to give them a 2ohm load at the amp.I tried to find out how to use a potentiometer to adjust the q's of them but I cant find any how to. I spoke with a tech at parts express and he recommended that I just short each unused coil .Is this safe? Will I gain anything by doing so? He said that it should make the subs louder. thanks
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-A vision without a plan is just a hallucination-
Replies:
Posted By: vibrationcustum
Date Posted: July 04, 2009 at 10:18 AM
is the amp 2 ohm stereo or 2 ohm mono? Don't short the coil out. In all my years of car audio I have never hear of speakers getting louder from shorting one sub out. If you can then I learn something new today.
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Can't be loud then don't have it.
(power acoustik system)
Head unit- TID-896 7" TOUCHSCREEN
ovn1-5500d 09 and another one coming soon
4-12" mofos 12ft3 box to 40hz (wall)
2 batterys, 1 power
Posted By: spmpdr
Date Posted: July 04, 2009 at 10:38 AM
it is a monoblock so its 2ohm stereo, Im not intending on shorting out the subs ,just one vc on each sub.
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-A vision without a plan is just a hallucination-
Posted By: DYohn
Date Posted: July 04, 2009 at 12:12 PM
Posted By: vibrationcustum
Date Posted: July 04, 2009 at 12:38 PM
dyon damn I read though that link and I learn about shorting out the voice coil. Cool Thanks for the info
-------------
Can't be loud then don't have it.
(power acoustik system)
Head unit- TID-896 7" TOUCHSCREEN
ovn1-5500d 09 and another one coming soon
4-12" mofos 12ft3 box to 40hz (wall)
2 batterys, 1 power
Posted By: haemphyst
Date Posted: July 04, 2009 at 12:40 PM
spmpdr wrote:
I run 2 12" 4ohm dvc subs as if they were svc 4om to give them a 2ohm load at the amp.I tried to find out how to use a potentiometer to adjust the q's of them but I cant find any how to. I spoke with a tech at parts express and he recommended that I just short each unused coil .Is this safe? Will I gain anything by doing so? He said that it should make the subs louder. thanks
WHY, WHY, WHY, do people think they have to load every amplifier to it's "maximum"?!?!?! Good GOD, people!
So, why don't you just run the individual woofer coils in series, then parallel the two woofers? You will provide the amplifier with a 4-ohm load, and lose less than 3dB in total output. Are you competing? You won't miss it, I GUARANTEE it, if you are not competing. The amp runs cooler, lower distortion and better damping... All good things! You'll also have more headroom, you'll have better "overpowering" buffer on the woofers, you'll be using all the copper in the voice coils that you paid for... Load the thing at 4 ohms and be happy. ------------- It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: yimke
Date Posted: July 04, 2009 at 12:59 PM
Do the connections proper, but just buy a better amp. Get a 2 ch. and connect each sub to each channel. Usually that is the most cost effective way.
Posted By: haemphyst
Date Posted: July 04, 2009 at 1:05 PM
yimke] wrote:
Do the connections proper, but just buy a better amp. Get a 2 ch. and connect each sub to each channel. Usually that is the most cost effective way.
He doesn't have to BUY anything... And the way I suggested IS proper. ------------- It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: spmpdr
Date Posted: July 04, 2009 at 4:49 PM
haemphyst,How would I wire them like that .I wired them with option2 in the 2 speaker 4ohmdvc section of thesub woofer wiring diagrams page on this site and I believe that is how your telling me to wire them now. If that is true then here is a very noticeable difference in sound that is why I changed them to the single 4ohm set up I run them at now .If your telling me different please explain because im not looking for maximum power ,I just want to have good sound.
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-A vision without a plan is just a hallucination-
Posted By: thatfloorguy
Date Posted: July 05, 2009 at 9:49 AM
You may have to re-set the gain,since the amp is now seeing a 4 ohm load, as opposed to a 2.
Posted By: thatfloorguy
Date Posted: July 05, 2009 at 10:05 AM
I have found the best possible sound doesn't neccesarily mean the loudest I used the information found here to construct a smaller enclosure tuned differently turned down the gain and matched frequency outputs and I have much better sound than before.I can turn up the HU to a much higher volume without any audible distortion too pioneer deh4900 zx350.4 cheap pioneer speakers/tweets zx750.1 L715 wired to 2 ohm 4.75 ft3^ tund to 40 hz
Posted By: spmpdr
Date Posted: July 05, 2009 at 10:20 AM
When I first got these 4ohm dvc subs I wired them in series /parallel.There is a big difference in sound quality to me. Im not just talking about loud,the bass if tighter and sounds better.My amp is recommend to have a 2ohm load(Memphis mcd500.1 monoblock).i too have read through countless pages on this forum and tuned my gains,and built a box all with help from everyone on this site. My system sounds better than it ever has .My subs sound better to me wired 4ohm svc with a 2ohm load,I just read about shorting dvc subs with a resistor and started digging up info on them. thanks for the 4ohm advice but I can tell a drastic change in sound (more than 3dbs).
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-A vision without a plan is just a hallucination-
Posted By: thatfloorguy
Date Posted: July 05, 2009 at 11:12 AM
I don't know much abt shorting a vc or using only 1 vc, there is a ongoing argument on that but it seems to me that using half the coils limits you to half the rms the sub will take. I just got a sub that I can wire to present a 2 ohm load to the amp. I Haven't tried a different ohm load but I know the amp's output is higher ar far as rms at the lower ohm load. My enclosure made the most difference tho once I was informed as how to adjust the settings and set the gains. I just need some real compononts and HU now 
Posted By: spmpdr
Date Posted: July 05, 2009 at 11:59 AM
What you are saying is true.Using only 1 vc onl lets you use half the power of the subs,My amp can only produce half the power anyway, that is why I wired them this way.I just wanted to know about shrting the unused coil .Dyohn provided the answer.
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-A vision without a plan is just a hallucination-
Posted By: DYohn
Date Posted: July 05, 2009 at 1:11 PM
The comments above about power handling are somewhat incorrect. Please refer to this discussion: https://www.the12volt.com/installbay/forum_posts.asp~TID~74640~PN~1------------- Support the12volt.com
Posted By: yimke
Date Posted: July 05, 2009 at 2:19 PM
haemphyst wrote:
yimke] wrote:
Do the connections proper, but just buy a better amp. Get a 2 ch. and connect each sub to each channel. Usually that is the most cost effective way.
He doesn't have to BUY anything... And the way I suggested IS proper.
I misread and thought he did not have an amp yet. Like you said series parallel is the best way to do this, and I would not short a voice coil. And yes your way is proper, I was calling shorting a voice coil proper.
If you only connect 1 voice coil per sub it will bring it to 2 ohms. I highly would not recommend this though, just do series-parallel and 4 ohms should be fine.
Posted By: 8mpg
Date Posted: July 08, 2009 at 9:12 PM
haemphyst wrote:
spmpdr wrote:
I run 2 12" 4ohm dvc subs as if they were svc 4om to give them a 2ohm load at the amp.I tried to find out how to use a potentiometer to adjust the q's of them but I cant find any how to. I spoke with a tech at parts express and he recommended that I just short each unused coil .Is this safe? Will I gain anything by doing so? He said that it should make the subs louder. thanks
WHY, WHY, WHY, do people think they have to load every amplifier to it's "maximum"?!?!?! Good GOD, people!
So, why don't you just run the individual woofer coils in series, then parallel the two woofers? You will provide the amplifier with a 4-ohm load, and lose less than 3dB in total output. Are you competing? You won't miss it, I GUARANTEE it, if you are not competing. The amp runs cooler, lower distortion and better damping... All good things! You'll also have more headroom, you'll have better "overpowering" buffer on the woofers, you'll be using all the copper in the voice coils that you paid for... Load the thing at 4 ohms and be happy.
Hate to steal the thread...but how can I wire a single DVC 4ohm woofer at 4 ohms? As far as I know, I can only choose 2 or 8. What is the db difference between 2 and 8ohm?
Posted By: spmpdr
Date Posted: July 08, 2009 at 9:39 PM
wire only one coil for a 4ohm load just leave the other coil open or short it with a piece of speaker wire
-------------
-A vision without a plan is just a hallucination-
Posted By: haemphyst
Date Posted: July 09, 2009 at 6:58 PM
8mpg] wrote:
haemphyst wrote:
spmpdr wrote:
I run 2 12" 4ohm dvc subs as if they were svc 4om to give them a 2ohm load at the amp.I tried to find out how to use a potentiometer to adjust the q's of them but I cant find any how to. I spoke with a tech at parts express and he recommended that I just short each unused coil .Is this safe? Will I gain anything by doing so? He said that it should make the subs louder. thanks
WHY, WHY, WHY, do people think they have to load every amplifier to it's "maximum"?!?!?! Good GOD, people!
So, why don't you just run the individual woofer coils in series, then parallel the two woofers? You will provide the amplifier with a 4-ohm load, and lose less than 3dB in total output. Are you competing? You won't miss it, I GUARANTEE it, if you are not competing. The amp runs cooler, lower distortion and better damping... All good things! You'll also have more headroom, you'll have better "overpowering" buffer on the woofers, you'll be using all the copper in the voice coils that you paid for... Load the thing at 4 ohms and be happy.
Hate to steal the thread...but how can I wire a single DVC 4ohm woofer at 4 ohms? As far as I know, I can only choose 2 or 8. What is the db difference between 2 and 8ohm?
1: The dB difference at 4 ohms will be identical to 8 ohms.
2: The difference will be less than 3dB, between 2- and 4- ohms ------------- It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
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