bassrace Posted August 17, 2011 Report Share Posted August 17, 2011 Well I just made my box and by my calculations im tuned to somewhere around 28hz. Can someone double check for me? My box is 5.3 cuft net after sub displacements but I dont know how much my ports displace. I have 3 4" aeros 23" long.(not flared,yet) 17" of each port is in the box. Im also wanting to know how many sq in of port there is per cu ft of the box. Please help ppl. Help is greatly appreciated. Thanks, Bassrace Quote 145.9@40hz 145.3@34hz big 3 X2 group 34 Deka Group 31 All 0/1 awg jl meta wire Alpine CDA 7894 Orion HCCA D5000 2 AQ HDC312's Crunch gpv1100.2 (for 6.5"s only) AQ pro audio 6.5" - 3 sets AQ supertweeters - 2 sets 2000 Slamry Link to comment Share on other sites More sharing options...
6berry Posted August 17, 2011 Report Share Posted August 17, 2011 I came up with tuning of just over 27 Hz 7.72 sq in of port per cube and .42 port displacement Quote 1999 Audi A4 1.8T::: 4 - DC Level 3 10's in a 4th order Rockford P6002 on Subs for now (3-3.5k coming eventually) MB Quart ONX4.60 for Mids and Highs Boston S50 Components in Front Boston S65 Coaxials in Rear 40 Sq Ft of Second Skin Damplifier Build Thread UBL 1948 Plymouth Link to comment Share on other sites More sharing options...
jmilch Posted August 17, 2011 Report Share Posted August 17, 2011 With the help of the Torres calc program (found here) I gathered the following from your provided information: Port area: 37.68 Port area per cube ft: 7.11 Tuning frequency: 26.12 hz If you dont have Torres, download it and try it.. Quote Pioneer AVH-P4300DVD | Hertz 6.5 | Alpine Type R 6x9 | Custom 200A Alt | Knu Flek 1/0 Big 3 and all wiring | Eclipse EA3422 | AudioQue 2200d | DC XL 12 | Red Oak Box ~2.8 cubes @ 30 hz | Link to comment Share on other sites More sharing options...
bassrace Posted August 17, 2011 Author Report Share Posted August 17, 2011 I came up with tuning of just over 27 Hz 7.72 sq in of port per cube and .42 port displacement Thanks man. So i guess I will figure out if I will add another 4" aero that port area seems a little small Quote 145.9@40hz 145.3@34hz big 3 X2 group 34 Deka Group 31 All 0/1 awg jl meta wire Alpine CDA 7894 Orion HCCA D5000 2 AQ HDC312's Crunch gpv1100.2 (for 6.5"s only) AQ pro audio 6.5" - 3 sets AQ supertweeters - 2 sets 2000 Slamry Link to comment Share on other sites More sharing options...
bassrace Posted August 17, 2011 Author Report Share Posted August 17, 2011 With the help of the Torres calc program (found here) I gathered the following from your provided information: Port area: 37.68 Port area per cube ft: 7.11 Tuning frequency: 26.12 hz If you dont have Torres, download it and try it.. Thanks man. I would download it but im mobile Quote 145.9@40hz 145.3@34hz big 3 X2 group 34 Deka Group 31 All 0/1 awg jl meta wire Alpine CDA 7894 Orion HCCA D5000 2 AQ HDC312's Crunch gpv1100.2 (for 6.5"s only) AQ pro audio 6.5" - 3 sets AQ supertweeters - 2 sets 2000 Slamry Link to comment Share on other sites More sharing options...
6berry Posted August 17, 2011 Report Share Posted August 17, 2011 i think with aero ports you need between 9-12 sq in per cube so youre a little low on port area but not too bad. maybe somebody with more experience on aero ports can help out Quote 1999 Audi A4 1.8T::: 4 - DC Level 3 10's in a 4th order Rockford P6002 on Subs for now (3-3.5k coming eventually) MB Quart ONX4.60 for Mids and Highs Boston S50 Components in Front Boston S65 Coaxials in Rear 40 Sq Ft of Second Skin Damplifier Build Thread UBL 1948 Plymouth Link to comment Share on other sites More sharing options...
6berry Posted August 17, 2011 Report Share Posted August 17, 2011 With the help of the Torres calc program (found here) I gathered the following from your provided information: Port area: 37.68 Port area per cube ft: 7.11 Tuning frequency: 26.12 hz If you dont have Torres, download it and try it.. you should have entered 5.3 into the gross volume instead of net volume because the 5.3 is after sub displacements but before port displacement Quote 1999 Audi A4 1.8T::: 4 - DC Level 3 10's in a 4th order Rockford P6002 on Subs for now (3-3.5k coming eventually) MB Quart ONX4.60 for Mids and Highs Boston S50 Components in Front Boston S65 Coaxials in Rear 40 Sq Ft of Second Skin Damplifier Build Thread UBL 1948 Plymouth Link to comment Share on other sites More sharing options...
bassrace Posted August 17, 2011 Author Report Share Posted August 17, 2011 i think with aero ports you need between 9-12 sq in per cube so youre a little low on port area but not too bad. maybe somebody with more experience on aero ports can help out Yea i suck dealing with aeros.lol thats why i had to ask. I was going with 2 6" but 4" is soo much cheaper, guess it kinda bit me in the ass. Quote 145.9@40hz 145.3@34hz big 3 X2 group 34 Deka Group 31 All 0/1 awg jl meta wire Alpine CDA 7894 Orion HCCA D5000 2 AQ HDC312's Crunch gpv1100.2 (for 6.5"s only) AQ pro audio 6.5" - 3 sets AQ supertweeters - 2 sets 2000 Slamry Link to comment Share on other sites More sharing options...
bassrace Posted August 18, 2011 Author Report Share Posted August 18, 2011 If I add 1 more 4" aero at the same length can anyone tell me the spec on that? I will be doing this tommorow morning so I need to know what the port area would be before l go choppin into my box.lol Quote 145.9@40hz 145.3@34hz big 3 X2 group 34 Deka Group 31 All 0/1 awg jl meta wire Alpine CDA 7894 Orion HCCA D5000 2 AQ HDC312's Crunch gpv1100.2 (for 6.5"s only) AQ pro audio 6.5" - 3 sets AQ supertweeters - 2 sets 2000 Slamry Link to comment Share on other sites More sharing options...
6berry Posted August 18, 2011 Report Share Posted August 18, 2011 That would leave you at 10.6 inches per cube of port which is good. and your internal volume is 4.73 with 0.57 port volume Quote 1999 Audi A4 1.8T::: 4 - DC Level 3 10's in a 4th order Rockford P6002 on Subs for now (3-3.5k coming eventually) MB Quart ONX4.60 for Mids and Highs Boston S50 Components in Front Boston S65 Coaxials in Rear 40 Sq Ft of Second Skin Damplifier Build Thread UBL 1948 Plymouth Link to comment Share on other sites More sharing options...
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