Question on 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=45745
Printed Date: May 10, 2025 at 4:58 AM
Topic: Question on wiring
Posted By: Carbonb
Subject: Question on wiring
Date Posted: December 22, 2004 at 1:44 AM
So I'll be running 2 12" JL W0's seperately. I am going to have them in seperate enclosures since I am going to be making glass enclosures on the opposite sides of my trunk.
Now I have an Alpine MRD-M301, I think the subs as are right now are wired at 4 ohm load, and the amp pushes at 150 x 1 at 4 ohms.
Now I want to wire them to the amp at 2 ohm load, since it pushes 350W x 1 @ 2 ohm load. I was wondering how I would go about doing this?
Since I am going to have 2 sets of speaker wires running to the amp and it's a mono channel. I don't know how to wire up the subs at 2 ohm and I don't know how to wire them to the amp.
Some help appreciated ;)
Replies:
Posted By: Carbonb
Date Posted: December 22, 2004 at 1:51 AM
Also the subs are rated at 4 ohm and I looked at the requirements for air.
It says 1.0 to 1.75 cubic feet of air per sub? That's a big range?
Posted By: spootydlux4
Date Posted: December 22, 2004 at 1:52 AM
are they dual 4 ohm or dual 2 ohm?
------------- blah blah blah blah
Posted By: Carbonb
Date Posted: December 22, 2004 at 1:54 AM
Single voice coil at 4ohm or 8 ohm.
Posted By: spootydlux4
Date Posted: December 22, 2004 at 2:00 AM
well if i am not mistaken, u can wire them in parallel and they will produce a 2 ohm load ------------- blah blah blah blah
Posted By: spootydlux4
Date Posted: December 22, 2004 at 2:01 AM
2 subs / Single Voice Coil - 4 ohms Option #1
 ------------- blah blah blah blah
Posted By: Carbonb
Date Posted: December 22, 2004 at 2:01 AM
If they are in seperate enclosures how could I go about wiring the subs parallel?
Also, how do they hook up to the amp?
Posted By: spootydlux4
Date Posted: December 22, 2004 at 2:02 AM
did that diagram show up? ------------- blah blah blah blah
Posted By: Carbonb
Date Posted: December 22, 2004 at 2:08 AM
So I basically just run the posotive from both subs and negative from both subs together and then connect them normal?
I think this was another reason my subs weren't hitting. They were wired at 4ohm and were only getting about 75 Watts each.
Posted By: spootydlux4
Date Posted: December 22, 2004 at 2:14 AM
yep thats about it! tell me how they sound and get some pics of that trunk during the construction and when its done
------------- blah blah blah blah
Posted By: Carbonb
Date Posted: December 22, 2004 at 2:16 AM
I'll try lol, I have a crappy camera and I am trying to get a new one, because it takes horrible pictures.
Posted By: jeffchilcott
Date Posted: December 22, 2004 at 2:38 PM
well if you have 2 4 ohm subs you cant have 4 ohm. you need to find out if the subs are 4 ohm or 8 ohm subs. if you wire 2 8 ohm subs in parrallel then you will have a 4 ohm load. if you wire 4 ohm subs in parrellel then you will get a 2 ohm load, if they are 2 ohm subs then you will get 1 ohm and your amo will go poof
------------- 2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: dedlyjedly
Date Posted: December 22, 2004 at 5:06 PM
yes jeff, i would have to agree...and since its a mono amp, 4 ohm stereo (current setup) is out of the question. youre likely already running 2 ohm mono and getting full potential out of the amp ------------- MECP certified, 5yrs experience, you probably otta listen bitch!!
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