two 4 ohm DVC wired to at 2 ohms

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=33249
Printed Date: June 09, 2024 at 5:52 AM

Topic: two 4 ohm DVC wired to at 2 ohms

Posted By: suicide
Subject: two 4 ohm DVC wired to at 2 ohms
Date Posted: June 03, 2004 at 9:01 PM

Like the topic says...

2 [4 ohm DVC] wired to at 2 ohms.///

My amp is a Kenwood KAC-7201...

stable at 2 ohms

I have 2x Audiobahn

AW1251T
12” NATURAL SOUND WOOFER
45 oz. Strontium Magnet
Power Handling: 400 watts RMS
Frequency Response: 24Hz - 1kHz
Efficiency: 92.1 dB
PHAT Foam Surround
Non-Pressed, Non-Transfer Paper Cone
KM3’ Coated for Virtually No Cone Distortion
2” 4-Layer ASV Voice Coil
Dual 4 Ohm
2 or 8 Ohm Operation
Mounting Dimensions: Depth; 5 1/4”
Hole; 10 7/8” Diameter; 12 1/2”
MULT-CONNECT Lug Lock Terminals

My local stereo shop told me to wire my subs like this..

2 DVC drivers with Voice Coils in Series / Parallel
Dual-4 Ohm Subwoofer: 4 Ohms

AMp set to MONO with LPF on..
posted_image THis doesn't seem right??

Now the way i had is running orginally.. was

2 DVC drivers with Voice Coils in Parallel / Parallel

4ohms running on each channel on STEREO with LPF on..

posted_image

can someone explain and maybe even solve the problem

- suicide

Replies:

Posted By: Ketel22
Date Posted: June 03, 2004 at 9:13 PM

your pictures didn't post.

you could only get 2 4ohm dvc subs to 2ohm if you ran each one to its own channel in a parallel circuit. if you wanted to bridge the amp you could run the subs to that with a parallel/series or series/parallel setup. that would give the amp 4ohms/2ohms per channel. just about the same as running each sub to a channel.

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Posted By: forbidden
Date Posted: June 03, 2004 at 9:20 PM

Your amp is stable only at two ohms stereo, not mono. 2 ohms stereo is the same thing as 4 ohm mono, thus the pic that shows above is the correct way to wire the subs to your amp and have the amplifier reach it's maximum output capabilities safely.

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Posted By: suicide
Date Posted: June 03, 2004 at 10:12 PM

OK so let me understand this..

If i follow the first diagram above.... when there bridged.. in STEREO it should be fine.. i have them on MONO and no sound comes out... so i turned them off.. and i have not turned them on since..

-suicide

Posted By: westend
Date Posted: June 03, 2004 at 11:48 PM

I have the same wiring as you posted above. If it is run in stereo your amp will be at a 4ohm load. If you have the amp switch to mono your amp will have a 2 ohm load.

Posted By: suicide
Date Posted: June 04, 2004 at 10:40 AM

so y isn't it working.. i have it run in MONO like the above configuration and no sound is comming out of it..

Posted By: DYohn
Date Posted: June 04, 2004 at 11:23 AM

As forbidden said, the Kenwood KAC-7201 is NOT stable at 2-ohms mono. It is stable at 2-ohms in stereo only. It requires a minimum 4-ohm load in mono. So if you have your speakers wired for 8-ohms, and then in parallel to the amp you are fine (4-ohms.) If you have your speakers wired for 2-ohms, they must be in series to the amp (4-ohms) or connected to the amp in stereo (one sub to each channel.) If you have your speakers wired for 2-ohms and then they are in parallel to the amp in mono, you have created a 1-ohm load which the amp will definately not handle. Indeed, if you had a 1-ohm load on that Kenwood, it is possible you have fried the amp. If you are unsure, get professional help from an install shop. I assume you have checked all your fuses as well?

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Posted By: suicide
Date Posted: June 04, 2004 at 3:39 PM

when i first turned it on i got no sound... then i turned it off and tried again and then nothing happened.. so i checked the fuses on the amp and they where both blown.....

Posted By: DYohn
Date Posted: June 04, 2004 at 3:44 PM

Then I suspect you have the system wired wrong. You need to re-wire as described in this thread. If you do not understand all the information already posted for you on this thread, I respectfully suggest you go to your nearest install shop and get some help.

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Posted By: BChillin83
Date Posted: June 04, 2004 at 11:08 PM

https://www.rockfordfosgate.com/rftech/wiringwizard.asp