HUMBOLDT_knock Posted May 8, 2009 Report Share Posted May 8, 2009 So I am going to build and enclosure for my chevy K1500 single cab. I have figured my NET internal dimensions will put me around 2.4 ^3 and I have 2) Orion HCCA 10.2 with 2000w between the two subs. I am having trouble getting the correct port length for proper tuning Fq. Some of the mmore simple port calculators tell me with a port 1.5x12" I would need it roughly 12.5" long to achieve 38hz. I also have the WinISD beta program and its showing 8.78 port length to achieve 38hz tuning. Anybody have any ideas? Quote Link to comment Share on other sites More sharing options...
Crump Posted May 8, 2009 Report Share Posted May 8, 2009 So I am going to build and enclosure for my chevy K1500 single cab. I have figured my NET internal dimensions will put me around 2.4 ^3 and I have 2) Orion HCCA 10.2 with 2000w between the two subs. I am having trouble getting the correct port length for proper tuning Fq. Some of the mmore simple port calculators tell me with a port 1.5x12" I would need it roughly 12.5" long to achieve 38hz. I also have the WinISD beta program and its showing 8.78 port length to achieve 38hz tuning. Anybody have any ideas? http://reaudio.com/speaker_box/LPort_Box_Calc.html Quote Team gg Team doa Installs I have doneMy 2010 Rebuild 144 db so far....2 DC xl 10s Firing into cabin on a RF 25002 12" AQ HD's powered by a Saz 2k + Lots o Mids+Highs Link to comment Share on other sites More sharing options...
shooter69 Posted May 8, 2009 Report Share Posted May 8, 2009 How accurate is that RE calc? Won't the sub displacement throw the tunning off? Quote (1)Fi BTL 15 (1)AQ 2200d 4.33 Cubes~33hz Big Three done XS 1200 in the back Link to comment Share on other sites More sharing options...
HUMBOLDT_knock Posted May 8, 2009 Author Report Share Posted May 8, 2009 http://reaudio.com/speaker_box/LPort_Box_Calc.html I've tried this one and I really don't like it because the port length is set at a certain length, does this mean that the paticular port length they have is optimal and I just need to adjust the port width to find my tuning Hz? Quote Link to comment Share on other sites More sharing options...
HUMBOLDT_knock Posted May 8, 2009 Author Report Share Posted May 8, 2009 It seems like my WinISD program is more accurate because I entered a shitload more information about my enclosure and all the thiele/small from my subs Quote Link to comment Share on other sites More sharing options...
HUMBOLDT_knock Posted May 8, 2009 Author Report Share Posted May 8, 2009 One more question I have is what port area should i be shooting for with these subs and enclosure? Quote Link to comment Share on other sites More sharing options...
bkolfo4 Posted May 8, 2009 Report Share Posted May 8, 2009 I would go for 20+ sqin of port per sub with that much power. If that port is for both subs, it is a little small. If that is the port you will use, I calculate 1.5" x 12" with 2.4 ft^3 net @ 38 Hz is 9.75 in long, assuming a slot port and that "net" includes the sub and port displacement. Quote Current system: 1997 Blazer - (4) Customer Fi NEO subs with (8) American Bass Elite 2800.1s Previous systems: 2000 Suburban - (4) BTL 15's and (4) IA 40.1's = 157.7 dB at 37 Hz. 1992 Astro Van - (6) BTL 15's and (6) IA 40.1's = 159.7 dB at 43 Hz. Link to comment Share on other sites More sharing options...
HUMBOLDT_knock Posted May 8, 2009 Author Report Share Posted May 8, 2009 (edited) OK, those were about the numbers I was getting with my program. I will however make my port larger. Probably go with a 2"x12" slot so that would put me a 24 sq, inches. You say 20+ for Each sub? Orion says 9 sq. inches for 1 sub at 1.2^3 so I was going to shoot for about that volume. 24 sq. inches sounds better to me, this will be one port for both woofers. do you think that will be still too small? I have very limited space so a 2" port may be as big as I can go. Thanks for your input. Edited May 8, 2009 by HUMBOLDT_knock Quote Link to comment Share on other sites More sharing options...
bkolfo4 Posted May 8, 2009 Report Share Posted May 8, 2009 That will work. . . Quote Current system: 1997 Blazer - (4) Customer Fi NEO subs with (8) American Bass Elite 2800.1s Previous systems: 2000 Suburban - (4) BTL 15's and (4) IA 40.1's = 157.7 dB at 37 Hz. 1992 Astro Van - (6) BTL 15's and (6) IA 40.1's = 159.7 dB at 43 Hz. Link to comment Share on other sites More sharing options...
HUMBOLDT_knock Posted May 8, 2009 Author Report Share Posted May 8, 2009 Great thank you! Quote Link to comment Share on other sites More sharing options...
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