facing subs, which is louder
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=74032
Printed Date: July 06, 2025 at 2:14 AM
Topic: facing subs, which is louder
Posted By: skylark
Subject: facing subs, which is louder
Date Posted: March 06, 2006 at 2:16 PM
I got a problem., I just recieved my new eclispe 88150 dvc sub today, so now i have three subs. Now the current enclosure holds two 15;s and they are facing the trunk, now the new enclosure im having a hard time getting it in, but it does fit facing the 3 15's up towards the trunk, now my question is with the other enclosure you could hear me down 4 blocks before i pull up, now with the new enclosure firing the subs toward the trunk lid, will i still have the same effect, when its now 3 eclipse 15 inch subs. advice will be greatly appreciated. ------------- goingcrazyonsound
Replies:
Posted By: jeffchilcott
Date Posted: March 06, 2006 at 3:26 PM
every vehicle is diffrent, I have had best results with subs firing back or up.
we currently have our subs all the way to the rear of the trunk with them firing up. this is the best results we have found so far
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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: coppellstereo
Date Posted: March 06, 2006 at 3:41 PM
what amp(s) are you running? It may change the sound dynamics - why not try it out?
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Posted By: skylark
Date Posted: March 06, 2006 at 3:48 PM
im using the jbl 1200.bp1 amp to run all three of the subs. They are all 4 ohm dvc, which means when i wire them they will put A 2.67 OHM LOAD on the amp which should be prefect, but the amp is one ohm stable and is a switching amp so it puts out the same amount of power at either ohm. I did a search on all the old topics and found out some interesting stuff, that is helping me make up my mind, and im gonna face them upwards, hopefully it will be louder then when i had two of them
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goingcrazyonsound
Posted By: arrow12
Date Posted: March 06, 2006 at 6:52 PM
Check the sag calculator to make sure the subs can face up.
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That's my opinion. Take it, leave it, or correct me.
Posted By: skylark
Date Posted: March 06, 2006 at 7:07 PM
whats that? sag calculator?
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goingcrazyonsound
Posted By: skylark
Date Posted: March 06, 2006 at 7:48 PM
i checked that sag thing and it says its not good for downfiring, that means up side down not firing up so it looks like im okay  ------------- goingcrazyonsound
Posted By: geepherder
Date Posted: March 06, 2006 at 8:15 PM
No, if it's not recommended to downfire, then it's not recommended to upfire either- you still run into the same sag issue.
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My ex once told me I have a perfect face for radio.
Posted By: pcguy760
Date Posted: March 07, 2006 at 12:29 AM
Whats a "sag calculator" ? Sounds like something women with saggy boobs would wanna use hahaha ... 
Posted By: Steven Kephart
Date Posted: March 07, 2006 at 12:41 AM
Posted By: skylark
Date Posted: March 07, 2006 at 12:49 AM
i figure that out after doing some reading on the link. Then i wnet back to work on my car more determined to fit the box in, and i got it in, after i found out they missed a back piece of metal in the trunk that stopped the box from going in all the way, so now the subs are facing the same way they did before when i had just 2 15's. So tomorrow when i finsh installing the subs i expect it to be louder then it was with 2 15';s so hopefully i should be happy until at least next summer ------------- goingcrazyonsound
Posted By: drvnbysound
Date Posted: March 07, 2006 at 1:50 AM
This site and link has been around for a long time.. I always suggest it to anyone inquiring about sub directions...
Aiming a woofer box...
Posted By: willdkartunes
Date Posted: March 07, 2006 at 2:31 AM
Is that JBL 1200.1 amplifier the same amp that you used on the two 15" setup? If it is then it won't be louder at all... If you upgraded the amplifier, then read this: This was already posted in a thread a little while ago by the way. In order to increase db you must double your wattage. That's only for a 3 db increase. So if two times the wattage you have yields +3db, then one and a half times the wattage would only be a +1.5db increase. Lets say you were running 400 watts to each of the two 15's before. To get another 400 watts to that other sub would cost atleast another $150 or possibly more. (don't know what you paid) In this example, that would mean you would pay $150 for a 1.5db gain, or $10 for every tenth of a decibel! If you paid more than 150 to get that extra 400 watts then the price for every tenth just got steeper. Louder? yes. Much louder? not really. On the other hand, if your in SPL comps then every tenth of a decibel counts.....
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