the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

how much output am i losing?


Post ReplyPost New Topic
< Prev Topic Next Topic >
armymp90099 
Copper - Posts: 76
Copper spacespace
Joined: July 05, 2009
Location: Illinois, United States
Posted: December 20, 2009 at 8:33 PM / IP Logged  
Ok I build my current box before I learned about port area for a certain box. My box currently is 3.2 FT^3 NET and it only has (1) 4" Flared port. So apparently I am WAY off. How much output am I losing by this limited port area? Im running 1K RMS of clean power daily. Would it be worth it to rebuild the box with more port area? Would it make a difference? Thanks guys.
-ETS-
Escape The Scilence
j.reed 
Copper - Posts: 716
Copper spacespace
Joined: January 05, 2009
Location: Arkansas, United States
Posted: December 20, 2009 at 9:02 PM / IP Logged  
What sub? If you are using the DC lvl 4 xl you were talking about in your other post. Not having enough port area will greatly hinder that subs output. Having a 4" port is almost like running it in a sealed enclosure. They are not designed for sealed and it will lose a lot of output.
how much output am i losing? -- posted image.
armymp90099 
Copper - Posts: 76
Copper spacespace
Joined: July 05, 2009
Location: Illinois, United States
Posted: December 20, 2009 at 9:15 PM / IP Logged  
lol no i dont have enough money for that yet im still running the alpine Type R 15 with the MRP1000.
-ETS-
Escape The Scilence
j.reed 
Copper - Posts: 716
Copper spacespace
Joined: January 05, 2009
Location: Arkansas, United States
Posted: December 20, 2009 at 9:33 PM / IP Logged  
for that cubic foot you need double the port area and your enclosure is a bit large. Im positive you would see a good increase of output in a correct enclosure, as well as better sound.
Type R info.
Middle of page 4 is all the enclosure specs, port specs and everything else you need to know to make a correct enclosure for the sub. If you have any questions feel free to ask.
how much output am i losing? -- posted image.
armymp90099 
Copper - Posts: 76
Copper spacespace
Joined: July 05, 2009
Location: Illinois, United States
Posted: December 20, 2009 at 10:39 PM / IP Logged  
yeah ive looked and looked and called the engineers at alpine to get their reccomendation. lol I just cant seem to get a good box design for my car with small volume and still be effective. I need a wide shallow box for the best daily output in my car and ive tried multiple designs. I was going to modify the box i showed you before to work for the type r and tune it to something not sure yet though. Would you think 2.25 or 2 cubes would work best? Im still new to box design and Id like to learn everything I can. lol
-ETS-
Escape The Scilence
j.reed 
Copper - Posts: 716
Copper spacespace
Joined: January 05, 2009
Location: Arkansas, United States
Posted: December 20, 2009 at 11:43 PM / IP Logged  
I would do the 2.9cu.ft. Gross. 22.5sq.in port area and 27 inches long.
Gross is total volume with port and driver displacement already taken into account. Makes it very easy. Just use the site calculator to see what measurement best fit your space to get you 2.9cu.ft. Then figure a port opening that will work. L x W =ing 22.5sq.in. or as close as possible. then make it 27 inches long.
how much output am i losing? -- posted image.
armymp90099 
Copper - Posts: 76
Copper spacespace
Joined: July 05, 2009
Location: Illinois, United States
Posted: December 21, 2009 at 12:25 PM / IP Logged  
ok ive been punching numbers and if they tuned the port to 30hz that would give me 27 in port length roughly...this seems a little low to me. what do you think?
-ETS-
Escape The Scilence
j.reed 
Copper - Posts: 716
Copper spacespace
Joined: January 05, 2009
Location: Arkansas, United States
Posted: December 21, 2009 at 7:07 PM / IP Logged  
That should be a really good musical tune for that sub. More of an SQ tune. If your wanting a bit more loudness at a bit of sacrifice to a more true SQ sound up the tune to about 33hz. so 22.5cu.in. port area, port length 21" Gross volume 2.82cu.ft.
how much output am i losing? -- posted image.

Sorry, you can NOT post a reply.
This topic is closed.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Thursday, October 31, 2024 • Copyright © 1999-2024 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer