mr babin this ones for you or anyone who is able to answer - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 4th March 2012, 11:59 PM   #1
diyAudio Member
 
Join Date: Dec 2011
Default mr babin this ones for you or anyone who is able to answer

i was using your subwoofer enclosure calculator and had a question:

i input:

Height? = 16 Inches
Width? = 28.5 Inches
Depth1? = 14 Inches
Depth2? = 14 Inches

Wood Thickness? = .75 Inches
Speaker Displacement? = 0.12 Ft³
Port Frequency? = 25 Hertz
Port Diameter? = 4 Inches
Number of Ports? = 1
Sq. Port Ratio H:W? = 1:

calculate results:

Box Front Angle = 90 Degrees
Gross box volume = 2.712 Ft3
Net box volume = 2.581 Ft3
Port Length = 17.992 Inches
Port Area = 12.566 Inches2
Port Volume = 0.131 Ft3

ok if i was to change:

Port Diameter? = 2 Inches
Number of Ports? = 2

resulting in:

Box Front Angle = 90 Degrees
Gross box volume = 2.712 Ft3
Net box volume = 2.681 Ft3
Port Length = 8.606 Inches
Port Area = 6.283 Inches2
Port Volume = 0.031 Ft3

1st question is, port diameter is for a circle port correct?
2nd question is, would these two enclosure sound exact same? or would one of them have improved sound quality? If so which one?

thanks.
  Reply With Quote
Old 5th March 2012, 12:07 AM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
25Hz is probably too low for a car unless you have a specific reason to go that low.

The sound would likely depend on how much displacement you were getting from the speakers. More displacement causes more airflow in the port and at high power, it's possible that you could have a problem with port noise with the smaller port area of the two 2" ports.

The round ports are supposed to be PVC or something similar. The calculator takes the port volume from the enclosure but does not compensate for the thickness of the port material.
  Reply With Quote
Old 5th March 2012, 12:25 AM   #3
diyAudio Member
 
Join Date: Dec 2011
its for a single 12" idmax dual 2ohm subwoofer and the recommended ported volume gross is 2.72 cu. ft. ported frequency 25hz port dimension is 4" i.d. x 17.5" long.

i'm trying to get the optimal sound quality from these subs.

so i would be better off with a 4" port instead of 2 - 2" ports? I placed the woofers in the center of the enclosure and was going to port 2 ports on the top side of the enclosure but if my sound quality will be affected will just go get a 4" port.
  Reply With Quote
Old 5th March 2012, 12:33 AM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
If you're going to drive it with anything near rated power, I'd suggest using a 4" port.
  Reply With Quote
Old 5th March 2012, 02:01 AM   #5
diyAudio Member
 
Join Date: Dec 2011
would 2 - 4" port instead of having just one affect sound quality because the box i build doesn't have room to place a port that long. if it does what differences would i get?
  Reply With Quote
Old 5th March 2012, 02:03 AM   #6
diyAudio Member
 
Join Date: Dec 2011
nevermind i asked that question i realized it was stupid and i got mmy answer just now by using your calculator
  Reply With Quote
Old 5th March 2012, 03:07 AM   #7
DREW028 is offline DREW028  United States
diyAudio Member
 
Join Date: Jun 2004
Location: chicago
Send a message via AIM to DREW028
When I had mines in a ported enclosure that was 4.5cuft 2 3" ports tuned to 34hz. Bass was nice and deep powered by a 1001bd at 1ohm. Then I switched to a sealed 4cuft. They still sounded deep, less low end but played a wider rang of music. Now I have them in a infinite baffle through the back deck lid. I am very pleased and very surprised how much output they have. A lot less output on the low end but gaining my trunk space back was worth it.


Chose the enclosure type suited for the type of music you listen to. Either way you can't go wrong, these subs will play nice in anything.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
mr. babin need ur help kicker zr repair zr600 Solid State 1 24th April 2012 06:34 PM
Help, Mr. Perry Babin !! Orion 225 HCCA trouble Yusef71 Car Audio 32 12th February 2012 11:54 AM
to mr perry babin and anyone who can answer this question on repair russdeanlee Car Audio 9 27th December 2011 08:38 AM
Mr. Babin and Mr. Bezjak...... 69CamaroSS396 Car Audio 24 14th September 2007 09:32 PM


New To Site? Need Help?

All times are GMT. The time now is 01:23 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2