can i downfire a rf p3 shallow sub?
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=93956
Printed Date: April 27, 2024 at 6:41 PM
Topic: can i downfire a rf p3 shallow sub?
Posted By: jonchos
Subject: can i downfire a rf p3 shallow sub?
Date Posted: May 15, 2007 at 10:14 PM
I have a P3SD412 sub and I am mounting it in my truck. Can I down fire this sub? I am not good the the formula there is arround here to figure it out. Thank you for your help.
Replies:
Posted By: jmelton86
Date Posted: May 15, 2007 at 11:23 PM
https://www.subwoofertools.com/forum/sag.htm stevdart showed me this awhile back. If you don't have the manual for the sub to get the specs then go to RF's website. ------------- 2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001
Posted By: sqsq
Date Posted: May 15, 2007 at 11:26 PM
you can set up any sub to downward fire as long as there's enough room for the sub to reach its maximum excursion without hitting the floor
Posted By: jmelton86
Date Posted: May 15, 2007 at 11:26 PM
Oh, I had 2 KickerComp 10's downfired (they, according to the sag calculator, weren't 'sag worthy') getting 250wrms (they're rated @ 150wrms) and they held up for the 6 months I had them. -Just got a G5 and GTR 10" ;)
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2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001
Posted By: jonchos
Date Posted: May 15, 2007 at 11:28 PM
jmelton86 wrote:
Oh, I had 2 KickerComp 10's downfired (they, according to the sag calculator, weren't 'sag worthy') getting 250wrms (they're rated @ 150wrms) and they held up for the 6 months I had them. -Just got a G5 and GTR 10" ;)
Yeah i do not know any of those variables for that formula, hahaha. I went to the site and i could not find them so...... Thank you anyway. I think is going to be fine.
Posted By: Steven Kephart
Date Posted: May 16, 2007 at 2:10 AM
Unfortunately the detailed tech paper where that sag program came from now has a broken link. Here's the correct link for those who are interested: https://www.adireaudio.com/Files/DriverOrientation.pdf
Posted By: jmelton86
Date Posted: May 16, 2007 at 2:23 AM
Okay, I tried to get to the tech sheet via rockfordfosgate.com but it kept freezing up on me. Oh, well. Just keep in mind that there's always a chance it could go by-by;) ------------- 2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001
Posted By: jonchos
Date Posted: May 16, 2007 at 8:25 AM
Posted By: stevdart
Date Posted: May 16, 2007 at 11:14 AM
The calc wants Xmax in millimeters, so use 13.4 for that. You get 1% saggy which means it's an excellent candidate for downfiring. ------------- 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: haemphyst
Date Posted: May 16, 2007 at 11:18 AM
sqsq] wrote:
you can set up any sub to downward fire as long as there's enough room for the sub to reach its maximum excursion without hitting the floor
Ummm... yeah, NO! bad sqsq... BAD! No, you cannot use ANY woofer in a downfiring situation, and this specific driver is NOT suitable for downfiring. It is 10% "saggy", and it WILL bang the stops, (at least the front stop...) and possibly fail significantly sooner than it should. At a very minimum, it'll NOT run linearly, and sound worse than RF woofers already do/can...
jmelton86 wrote:
Oh, I had 2 KickerComp 10's downfired (they, according to the sag calculator, weren't 'sag worthy') getting 250wrms (they're rated @ 150wrms) and they held up for the 6 months I had them. -Just got a G5 and GTR 10" ;)
huh... I wonder WHY they failed... Could it be, oh, because they WEREN'T SUITED FOR DOWNFIRING?!?! There's a reason people provide all of this help... so you don't HAVE to replace your woofers every 6 months... jeez, man, a woofer should last you tens of YEARS without failing...
jonchos wrote:
jmelton86 wrote:
Oh, I had 2 KickerComp 10's downfired (they, according to the sag calculator, weren't 'sag worthy') getting 250wrms (they're rated @ 150wrms) and they held up for the 6 months I had them. -Just got a G5 and GTR 10" ;)
Yeah i do not know any of those variables for that formula, hahaha. I went to the site and i could not find them so...... Thank you anyway. I think is going to be fine.
:::::EDIT:::::
Wait a second... You chose that woofer because you didn't have space for a deeper woofer, but NOW you want to fire it down, and take up a HUGE footprint? Something doesn't make sense with this situation... Why don't you tell us EXACTLY what you have in mind, with car and everything, and maybe we can keep you from getting into a situation that you will not be happy with... ------------- It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: jmelton86
Date Posted: May 16, 2007 at 6:34 PM
jmelton86 wrote:
| Oh, I had 2 KickerComp 10's downfired (they, according to the sag calculator, weren't 'sag worthy') getting 250wrms (they're rated @ 150wrms) and they held up for the 6 months I had them. -Just got a G5 and GTR 10" ;) |
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haemphyst wrote: huh... I wonder WHY they failed... Could it be, oh, because they WEREN'T SUITED FOR DOWNFIRING?!?! There's a reason people provide all of this help... so you don't HAVE to replace your woofers every 6 months... jeez, man, a woofer should last you tens of YEARS without failing... *I didn't say they failed. I said they held up fine, overpowered, for the 6 months I was using them. I just got the G5 and GTR, that's why I took out the Comp 10's. Thanks, though. ------------- 2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001
Posted By: jonchos
Date Posted: May 16, 2007 at 7:17 PM
haemphyst wrote:
sqsq] wrote:
you can set up any sub to downward fire as long as there's enough room for the sub to reach its maximum excursion without hitting the floor
Ummm... yeah, NO! bad sqsq... BAD! No, you cannot use ANY woofer in a downfiring situation, and this specific driver is NOT suitable for downfiring. It is 10% "saggy", and it WILL bang the stops, (at least the front stop...) and possibly fail significantly sooner than it should. At a very minimum, it'll NOT run linearly, and sound worse than RF woofers already do/can...
jmelton86 wrote:
Oh, I had 2 KickerComp 10's downfired (they, according to the sag calculator, weren't 'sag worthy') getting 250wrms (they're rated @ 150wrms) and they held up for the 6 months I had them. -Just got a G5 and GTR 10" ;)
huh... I wonder WHY they failed... Could it be, oh, because they WEREN'T SUITED FOR DOWNFIRING?!?! There's a reason people provide all of this help... so you don't HAVE to replace your woofers every 6 months... jeez, man, a woofer should last you tens of YEARS without failing...
jonchos wrote:
jmelton86 wrote:
Oh, I had 2 KickerComp 10's downfired (they, according to the sag calculator, weren't 'sag worthy') getting 250wrms (they're rated @ 150wrms) and they held up for the 6 months I had them. -Just got a G5 and GTR 10" ;)
Yeah i do not know any of those variables for that formula, hahaha. I went to the site and i could not find them so...... Thank you anyway. I think is going to be fine.
:::::EDIT:::::
Wait a second... You chose that woofer because you didn't have space for a deeper woofer, but NOW you want to fire it down, and take up a HUGE footprint? Something doesn't make sense with this situation... Why don't you tell us EXACTLY what you have in mind, with car and everything, and maybe we can keep you from getting into a situation that you will not be happy with...
I am instaling it in a nissan frontier extended cab. I am trying to get as stealthy as posible. The box I am building will replace the bottom part seat of the rear jumper seat in the cab. Thats why I want it to downfire. I don't understand why some people used the formula to help me and say it's good for this firing position and you and others say no. I did not start this threat to get in arguments about donwfiring, only to get help. Thank you.
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