General SQ General discussion of Sound Quality related issues.

Sealed mids in doors?

Old 05-15-2011, 08:11 AM
  #1  
500 Watt CAFz'r
Thread Starter
iTrader: (3)
 
Join Date: Mar 2006
Posts: 597
Sealed mids in doors?

Hello
Do any of you have 6-7 inch mids in door with a sealed enclosure? what are the advantages? What mids and how are you building the box?
Just trying to get a general feeling for the subject.
zoomer is offline  
Old 05-15-2011, 10:14 AM
  #2  
Yankee
 
JohnVroom's Avatar
 
Join Date: Oct 2003
Posts: 3,599
sealing has advantages including 'fixing' performance (the speaker will perform in a predictable fashion and have a controlled lower end), it will protect the speaker from moisture damage
the disadvantages include limited low frequency response, clearance issues for the window, cost, a new higher resonance frequency (this may or may not be a big deal)
JohnVroom is offline  
Old 05-17-2011, 12:31 PM
  #3  
Goalie Man
 
goalie 35's Avatar
 
Join Date: May 2003
Posts: 1,412
when you use a door the driver should have a high q value to work in a large enclosure, like a pioneer prs720 driver, now a low q driver wont work as well like a peerless 830883, so becarefull of the specs on driver and you should be ok.. i like both a door mount and a kick panel mount.. i have an issue with doors tho as they require tons of damping and customization to make the door look good sound good and not rattle or hum.. where as a kick panel might make your life easier and you can put the tweeter down there as well..
goalie 35 is offline  
Old 05-17-2011, 03:51 PM
  #4  
50 Watt CAFz'r
 
Join Date: Dec 2009
Posts: 50
What volume is good for 6,5s in sealed kickpanels/door enclosure?
jon818181 is offline  
Old 05-17-2011, 07:37 PM
  #5  
Yankee
 
JohnVroom's Avatar
 
Join Date: Oct 2003
Posts: 3,599
Originally Posted by jon818181 View Post
What volume is good for 6,5s in sealed kickpanels/door enclosure?
that would be a specification unique to each driver and is published by the manufacturer
JohnVroom is offline  
Old 05-17-2011, 07:49 PM
  #6  
Level 3 Supporter
 
Join Date: Feb 2011
Posts: 391
^or figured with TS parameters?
Mr.DatSubishi is offline  
Old 05-17-2011, 09:10 PM
  #7  
500 Watt CAFz'r
Thread Starter
iTrader: (3)
 
Join Date: Mar 2006
Posts: 597
Originally Posted by jon818181 View Post
What volume is good for 6,5s in sealed kickpanels/door enclosure?
My DLS Nobelium 6.5 Data sheet suggests .2Cuft or about 5.5 liters. That is big to make in the doors. I also did a Design using TS parameters in WinSDPro and considering that I high pass them at 80hz a .1 cuft box seem to work fine too.

see the plots.
box = 1 cuft simulate door panel -3db = 171 hz
box = .2 cuft DLS recommendation -3db = 159 hz
box =.1 cuft. my small box simulation -3db = -150 hz
one sees how the higher Q of the smaller box causes increased resonance frequency but reduces the -3db frequency. Interesting effect and honesty I was expecting a much lower -3db point for the 1 cubic foot box.

thanks everyone for all the replies
Attached Thumbnails Sealed mids in doors?-dls-nobelium-mids-winisdpro.jpg  
zoomer is offline  
Old 05-17-2011, 09:25 PM
  #8  
500 Watt CAFz'r
Thread Starter
iTrader: (3)
 
Join Date: Mar 2006
Posts: 597
Originally Posted by goalie 35 View Post
when you use a door the driver should have a high q value to work in a large enclosure, like a pioneer prs720 driver, now a low q driver wont work as well like a peerless 830883, so becarefull of the specs on driver and you should be ok.. i like both a door mount and a kick panel mount.. i have an issue with doors tho as they require tons of damping and customization to make the door look good sound good and not rattle or hum.. where as a kick panel might make your life easier and you can put the tweeter down there as well..
thanks for this. Can you tell me what the Qts/Qms/Qes of the PRS set is? I cant find it any where on the Pioneer site. just as a comparison from the Nobelium data sheet Qts=.32 Qes=.37 Qms=1.9 (yes weird Qts is less than Qms?)
zoomer is offline  
Old 05-18-2011, 01:49 AM
  #9  
Goalie Man
 
goalie 35's Avatar
 
Join Date: May 2003
Posts: 1,412
Thumbs up

Originally Posted by zoomer View Post
thanks for this. Can you tell me what the Qts/Qms/Qes of the PRS set is? I cant find it any where on the Pioneer site. just as a comparison from the Nobelium data sheet Qts=.32 Qes=.37 Qms=1.9 (yes weird Qts is less than Qms?)
ill do one better go to diymobile audio. com then click on car audio forum, go down to klippel reviews and driver specs. then scoll down to prs 720 review about 1/2 way down. thread by npdang, started 12/23/2009. there is another review in the members reviews and product comparisons section on page 2 closer to the bottom.. great read as well.. also they test the hybrid, hertz mille, peerless as well. good info.
goalie 35 is offline  
Old 05-18-2011, 07:59 PM
  #10  
500 Watt CAFz'r
Thread Starter
iTrader: (3)
 
Join Date: Mar 2006
Posts: 597
Originally Posted by goalie 35 View Post
ill do one better go to diymobile audio. com then click on car audio forum, go down to klippel reviews and driver specs. then scoll down to prs 720 review about 1/2 way down. thread by npdang, started 12/23/2009. there is another review in the members reviews and product comparisons section on page 2 closer to the bottom.. great read as well.. also they test the hybrid, hertz mille, peerless as well. good info.
Thanks! Some good reads! Pioneer has certainly done its homework with the PRS lineup!
zoomer is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
glennersss
General Discussion
1
05-07-2010 11:05 PM
sheikyerbouti
Enclosure Design & Construction Help
1
09-12-2009 11:20 AM
Fergifruitchew
General SQ
0
06-22-2009 06:05 PM
t money
General Discussion
9
10-19-2008 01:27 PM


Thread Tools
Search this Thread
Quick Reply: Sealed mids in doors?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.