two 4 ohm DVC wired to at 2 ohms

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suicide

Member - Posts: 14

Joined: June 03, 2004

Posted: June 03, 2004 at 9:01 PM / IP Logged

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..

two 4 ohm DVC wired to at 2 ohms - Last Post -- 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..

two 4 ohm DVC wired to at 2 ohms - Last Post -- posted image.

can someone explain and maybe even solve the problem

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Ketel22

Silver - Posts: 976

Joined: August 23, 2003

Location: United States

Posted: June 03, 2004 at 9:13 PM / IP Logged

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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Joined: November 01, 2003

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Posted: June 03, 2004 at 9:20 PM / IP Logged

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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suicide

Member - Posts: 14

Joined: June 03, 2004

Posted: June 03, 2004 at 10:12 PM / IP Logged

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..

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westend

Member - Posts: 9

Joined: April 02, 2004

Location: United States

Posted: June 03, 2004 at 11:48 PM / IP Logged

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.

suicide

Member - Posts: 14

Joined: June 03, 2004

Posted: June 04, 2004 at 10:40 AM / IP Logged

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

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: June 04, 2004 at 11:23 AM / IP Logged

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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suicide

Member - Posts: 14

Joined: June 03, 2004

Posted: June 04, 2004 at 3:39 PM / IP Logged

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.....

DYohn

Moderator - Posts: 10,741

Joined: April 22, 2003

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Posted: June 04, 2004 at 3:44 PM / IP Logged

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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BChillin83

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Joined: January 16, 2004

Location: Virginia, United States

Posted: June 04, 2004 at 11:08 PM / IP Logged

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

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two 4 ohm DVC wired to at 2 ohms

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