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ported or sealed for spl


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d_stever 
Member - Posts: 24
Member spacespace
Joined: March 09, 2006
Location: United States
Posted: December 02, 2007 at 7:42 PM / IP Logged  
whats better in a hatch back for spl, ported or sealed
zhalverson 
Copper - Posts: 180
Copper spacespace
Joined: January 21, 2005
Location: United States
Posted: December 02, 2007 at 8:49 PM / IP Logged  

ported

d_stever 
Member - Posts: 24
Member spacespace
Joined: March 09, 2006
Location: United States
Posted: December 06, 2007 at 6:07 PM / IP Logged  
slot or round ports?
haemphyst 
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Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: December 06, 2007 at 8:35 PM / IP Logged  
Won't matter. A port is a port.
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."
jl.w7 
Copper - Posts: 59
Copper spacespace
Joined: September 23, 2007
Location: Alberta, Canada
Posted: December 07, 2007 at 9:47 AM / IP Logged  
I actually find that circular ports produce more thump in a hatchback, i dunno maybe Im just hearing things.......
MECP Certified
(2)Infinity 3.5" 3012CF
(2)Infinity 6x9 9612I
(1)Sony CDXGT710
(2)MTX TC510 and,
A load of dynamat!
1982 Chevy Cavalier
haemphyst 
Platinum - Posts: 5,053
Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: December 07, 2007 at 11:34 AM / IP Logged  
jl.w7 wrote:
I actually find that circular ports produce more thump in a hatchback, i dunno maybe Im just hearing things.......
Yep... You're just hearing things... ported or sealed for spl -- posted image.
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."
jfinks 
Copper - Posts: 76
Copper spacespace
Joined: May 31, 2007
Location: United States
Posted: December 07, 2007 at 12:34 PM / IP Logged  

The current though on woofers in a hatch back is to point them back and up at the glass/hatch.  You could say that the shape of the hatch acts like a horn. Its like pointing a home sub-woof in the corner of the room.

Port cross sectional shape has no real effect.

jl.w7 
Copper - Posts: 59
Copper spacespace
Joined: September 23, 2007
Location: Alberta, Canada
Posted: December 07, 2007 at 12:49 PM / IP Logged  

so your saying to piont the port up wards to the window?

MECP Certified
(2)Infinity 3.5" 3012CF
(2)Infinity 6x9 9612I
(1)Sony CDXGT710
(2)MTX TC510 and,
A load of dynamat!
1982 Chevy Cavalier
jfinks 
Copper - Posts: 76
Copper spacespace
Joined: May 31, 2007
Location: United States
Posted: December 07, 2007 at 2:17 PM / IP Logged  

the woofers and the ports ...if you use ports. Ports do not nessisarily make a woofer louder.  What they do is extend the woofers ability to produce lower octives. The port takes over the work of the woofer as the frequency approches the tune of the port. So in effect it does make the woofer louder but at the lower frequencies. This does not mean that it is louder in its over all responce. If you design the responce to peak at this point to an extrem then you end up with what is refered to as one note wonder, which is loud but does not usually sound very good.

If your only goal is to get loud then you want to build a woofer/ box combo that will give you a peak responce at the resinance frequincy of the interior of the car.

crewwzin 
Member - Posts: 25
Member spacespace
Joined: November 15, 2007
Location: Florida, United States
Posted: December 07, 2007 at 3:03 PM / IP Logged  
How does one go about finding the resonant frequency of said interior?
I'd rather be in the boat with a drink on the rocks, than in the drink with a boat on the rocks!
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