Different ohm drivers wired together
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=35069
Printed Date: July 12, 2025 at 4:32 AM
Topic: Different ohm drivers wired together
Posted By: turnitup
Subject: Different ohm drivers wired together
Date Posted: July 05, 2004 at 1:25 PM
I know this has been a previous topic but I have two 15's paralleled together to make a 1 ohm load. Since my amp is not efficiently stable at 1 ohm I have another 12 inch (2 ohm) that I would like to wire in to make the total load 3 ohms. I have no questions that the amp will then run stable but as I read in a previous post, wach sub will not get the same amount of power due to different resistance. My question is which one will get more power? The two 15's or the 12"? I would assume the two 15's which is what I want since their resistance is lower but I was looking for another opinion. If a picture helps here ya go... 
Replies:
Posted By: turnitup
Date Posted: July 05, 2004 at 1:27 PM
Sorry. Here....
Posted By: forbidden
Date Posted: July 05, 2004 at 7:37 PM
Not recommended. Current will always take the path of least resistance. You are also opening up a can of worms in the cancellation department as well. Do not get hung up on the power ratings of things. Your best option here is to wire the two 15's in a series / parallel set up, set your gains properly and enjoy the system, all the while keeping your eyes open for an amp that will suit the needs of the system better.
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Posted By: chevyman26
Date Posted: July 05, 2004 at 9:25 PM
I second that motion.
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You'd better get me out of this lord... or else you'll have me to deal with. -- Hunter S. Thompson "F.A.L.I.L.V."
Posted By: stevdart
Date Posted: July 05, 2004 at 10:57 PM
Third here, and you'll notice there won't be a lot of responses because Rob is right on the money, like always. You are not alone having components of a system that are not perfectly matched...and nobody's system is ever complete. That is to say, work with what you've got, as Rob said, until such time comes that you can make an improvement. But don't add oddball woofers into the mix to try to achieve load impedance for the amp. First and foremost, the sound is what is important. Wire those 15's to a load suitable for the amp, or sell them and get something else. I run my sub at a 4 ohm load, and a lot of others do too. With 15's, especially, you need as much damping factor as you can get. There's more mass to put the brakes to.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
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