Downfiring
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=68388
Printed Date: July 16, 2025 at 2:58 AM
Topic: Downfiring
Posted By: kirktcashalini
Subject: Downfiring
Date Posted: December 14, 2005 at 6:42 PM
hey, I am building a new box for my blazer and I need info about diwnfiring. I vaugly remember a website where you could put in xmax, qts, vas, whatever was needed to see if the speaker was suitable for downfiring. I was wondering if anyone knew where that site was again. And experiences about downfiring, whether they liked it or not. Thanks alot. Probablyyyyy a Eclipse Titanium 12".
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99 Blazer LT. Yellow Top. Big 3. Infinity Kappa Speakers All Around. Jensen CD/DVD flip out. 2 Infinity Kappa Perfect 12DVQs powered by a Alpine PDX600.1 (in one custom box, building a FG box)
Replies:
Posted By: DYohn
Date Posted: December 14, 2005 at 6:49 PM
Posted By: kirktcashalini
Date Posted: December 14, 2005 at 6:51 PM
boo-yah thanks DYohn
any info on eclipse titanium subwoofers from personal experience anyone?
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99 Blazer LT. Yellow Top. Big 3. Infinity Kappa Speakers All Around. Jensen CD/DVD flip out. 2 Infinity Kappa Perfect 12DVQs powered by a Alpine PDX600.1 (in one custom box, building a FG box)
Posted By: stevdart
Date Posted: December 14, 2005 at 10:01 PM
You want to hide a Titanium by using the downfiring method? She's pretty! ...and may be offended if you don't let her show her face. And I've heard she likes a lot of power.
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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: coppellstereo
Date Posted: December 15, 2005 at 2:29 AM
I have one, I am pushing a 12" with a JBL BP1200.1 It is wired in parallel and down to 1.9ohms. This is a little over 1200watts. She does love it! And yes, she is pretty! What makes one sub better suited for downfiring than another? And what are distinct advantages of downfiring? -------------
Posted By: stevdart
Date Posted: December 15, 2005 at 8:20 AM
Gravity sag. Some of the T/S parameters that tell of a speakers suspension and xmax (among others) are used to calculate how gravity will cause the cone to sag. 5% of excursion is the limit. Anything above that may result in poor performance. Benefits: stealth installation, cosmetics (if you don't want to see the speaker), and possibly might fit some situations better than side-firing would. More often used in home audio for a "furniture" look. ------------- 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: coppellstereo
Date Posted: December 15, 2005 at 1:01 PM
Makes sense to me. Will it affect responsiveness? A guy at a speaker shop convinced my friend that it would keep his trunk from rattling -------------
Posted By: kirktcashalini
Date Posted: December 15, 2005 at 7:21 PM
my vehicle got broken into and they stole my old setup, shattered the window and all that. and yes, they look beautiful. but i am now worried about theft and would rather someone see a big box with nothing on it in my trunk that is built in and fabbed around all the contours with a downfiring sub, than a sub and say hey that looks good...
pissed me off, and also sucks cause building downfiring boxes is alot more difficult, especially the design i have in mind.
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99 Blazer LT. Yellow Top. Big 3. Infinity Kappa Speakers All Around. Jensen CD/DVD flip out. 2 Infinity Kappa Perfect 12DVQs powered by a Alpine PDX600.1 (in one custom box, building a FG box)
Posted By: oxygen65
Date Posted: December 18, 2005 at 4:19 AM
i have a 95 blazer and i has 4 premiers in a downfirering box and not only does it save a lot of space but it sounds really good too
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