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12" and either a 10" or 15"

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=63288
Printed Date: May 15, 2025 at 10:24 PM


Topic: 12" and either a 10" or 15"

Posted By: jlord16
Subject: 12" and either a 10" or 15"
Date Posted: September 26, 2005 at 12:32 AM

I am currently running a 12" Pioneer TS-W305C subwoffer and i wanted to add another sub to my system.  Is there any reason i cant add a 10" Pioneer TSW255C sub or a 15" Sony XS-L151P5 Pentagonal sub, or wuld it be better to stick with another 12" Pioneer.  From what i understand, a 10" will giver a higher frequency response and the 15" will allow for lower frequencies then what the 12" can produce.  Is there any reason i cant mix sub sizes???

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Clarion DB36MP
Infinity Kappa Perfect 10"
Respone 800w Mono
ALPINE MRP-F250
*Custom fabrications*



Replies:

Posted By: dwarren
Date Posted: September 26, 2005 at 12:39 AM
I would recommned at against running two different sub sizes. You need to locate another identical sub and you may need a different amp accoding to the new ohm load.

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Posted By: jlord16
Date Posted: September 26, 2005 at 1:38 AM
I got a 2 ohm stable, 4 x 300watt max amp, with 2 channels bridged into the 4 ohm independant sub.  Couldnt i just bridge my other 2 channels to run another 4 ohm 12" sub???  Also wen amplifiers say they put out more at like a 2 ohm load as opposed to 4 ohm (as they wuld with less resistance), do u need to buy a 2 ohm independant sub, or is it to do with the amps wiring as to the resistance???  As most amps have better output with a 1 or 2 ohm load

-------------
Clarion DB36MP
Infinity Kappa Perfect 10"
Respone 800w Mono
ALPINE MRP-F250
*Custom fabrications*




Posted By: stevdart
Date Posted: September 26, 2005 at 8:09 AM

jlord16 wrote:

As most amps have better output with a 1 or 2 ohm load

Not true.  Although there is MORE output at a lower ohm load, it is not "better".  The better output would be with a 4 ohm load or higher.

Yes, you can bridge another 4 ohm sub onto channels 3 and 4.

It has to do with the voice coil wiring, not amp wiring.  Once you wire voice coils together to create a load and attach it to the amp, the amp will provide power according to that load.  A single 4 ohm voice coil woofer puts a 4 ohm load onto the amp.  Anything different than one SVC requires that you wire coils together.

A 4-channel (or 2-channel) amplifier is normally stable at 2 ohms per channel.  That means you can bridge a 4 ohm load across two channels and you will be at the amp's limits.  Better output, although less, would be with a 8 ohm load bridged...the amplifier would then produce at it's best rated specs (read the specs in the 4 ohm output).  With subs, though, powering at 2 ohms is common and acceptable.



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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.




Posted By: jlord16
Date Posted: September 27, 2005 at 5:57 AM
Ok its at 4 ohm atm, and it gets good clean bass, i was just wondering what other options i had, thanks for the reply, my sub is only SVC

-------------
Clarion DB36MP
Infinity Kappa Perfect 10"
Respone 800w Mono
ALPINE MRP-F250
*Custom fabrications*





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