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port diameter & length


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05colorado 
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Posted: April 01, 2006 at 6:11 AM / IP Logged  

BOX dimensions:  50"w x 17"h x 15"d

2 x 4"port 7"long <=======================?

2 x rockford fosgate HX2 15" subs

rockford fosgates webpage  reccomends that port size and length,  should the length be longer, I am trying to achieve low and loud bass

chrome...its whats for dinner
DYohn 
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Posted: April 01, 2006 at 9:54 AM / IP Logged  
This is what Rockford recomends for two of these woofers in one enclosure?  Hmm.  Well the enclosure seems large enough (5.8 cuft gross) but the port seems off as it is tuning to about 18Hz.  What is the fs, Vas and Qts of one of those woofers?
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boardinbum 
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Posted: April 01, 2006 at 6:20 PM / IP Logged  
Actually, I think I graphed this woofer up once. And you did have to tune it down to about 18hz and there's a nice rounded slope that peaks at about 50hz.
05colorado 
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Posted: April 01, 2006 at 9:46 PM / IP Logged  

boardinbum wrote:
Actually, I think I graphed this woofer up once. And you did have to tune it down to about 18hz and there's a nice rounded slope that peaks at about 50hz.

so how do i get that

chrome...its whats for dinner
boardinbum 
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Posted: April 02, 2006 at 12:43 AM / IP Logged  
First off, I want to make sure this is right. Which sub is it you have? The RFD2115 or the RFD2215?
boardinbum 
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Posted: April 02, 2006 at 12:45 AM / IP Logged  
Actually, DYohn, he had it tuned at ~35hz.
05colorado 
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Posted: April 02, 2006 at 1:56 AM / IP Logged  
I have the RFD1215 's
chrome...its whats for dinner

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