downfiring sub box, pros and cons?

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05colorado

Member - Posts: 19

Joined: March 28, 2006

Location: Canada

Posted: March 28, 2006 at 5:46 PM / IP Logged

this is a box for 2 rockford fosgate HX2 15's. ive decided to have the subs faced towards the floor, and the ports firing towards the seats. does anyone here know the pros & cons of that setup

chrome...its whats for dinner

supradude

Silver - Posts: 915

Joined: September 21, 2004

Location: South Carolina, United States

Posted: March 28, 2006 at 8:09 PM / IP Logged

It should be OK , just make sure you have enough clearance between the subs and floor. As far as how it'll sound, you'll have to try it facing different directions to see what sounds the best for your setup.

'85 Toy

stevdart

Platinum - Posts: 5,816

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Joined: January 24, 2004

Location: Pennsylvania, United States

Posted: March 28, 2006 at 9:04 PM / IP Logged

Run them through the sag calculator to make sure they're suitable 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.

05colorado

Member - Posts: 19

Joined: March 28, 2006

Location: Canada

Posted: March 29, 2006 at 4:23 AM / IP Logged

it said theyre 78% saggy & NOT suitable for downfiring

chrome...its whats for dinner

stevdart

Platinum - Posts: 5,816

Joined: January 24, 2004

Location: Pennsylvania, United States

Posted: March 29, 2006 at 6:30 AM / IP Logged

Something was entered wrong. Use mm for Xmax, not inches. http://www.mhsoft.nl/conv1.htm for conversions. I haven't seen very many drivers come up much higher than 5% saggy.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

05colorado

Member - Posts: 19

Joined: March 28, 2006

Location: Canada

Posted: March 29, 2006 at 6:47 AM / IP Logged

thanks for that tip, its now 3% saggy, I didnt know to use MM instead of inches. thats awesome, i was afraid that i wasnt gunna be able to do that. a few of my friends think that doing it this way will make it sound waaayyyyy quieter. I say it makes no difference.

chrome...its whats for dinner

stevdart

Platinum - Posts: 5,816

Joined: January 24, 2004

Location: Pennsylvania, United States

Posted: March 29, 2006 at 7:07 AM / IP Logged

Good, it will be fine to use that way. BTW, there have been more than a few 12volt members who have quieted their friends with the end result!

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

05colorado

Member - Posts: 19

Joined: March 28, 2006

Location: Canada

Posted: March 29, 2006 at 6:29 PM / IP Logged

how much space should I leave between the woofer and the floor of the cab ?

chrome...its whats for dinner

Aruman

Silver - Posts: 363

Joined: July 27, 2005

Location: Aruba

Posted: March 29, 2006 at 7:46 PM / IP Logged

use this program for conversions, it's free and very good.

http://joshmadison.net/software/convert/

stevdart

Platinum - Posts: 5,816

Joined: January 24, 2004

Location: Pennsylvania, United States

Posted: March 29, 2006 at 10:51 PM / IP Logged

05colorado wrote:

how much space should I leave between the woofer and the floor of the cab ?

You really just need to clear max excursion, but give it a little extra space if you can.

Aruman, I downloaded that program, it's a good one. Thanks for the link!

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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