Port area

[Kranz38 0]

Right now i currently have 2 boxes around 5.4 cubes per box @ 34 hz. I know i really could get the BL's to slam the lows alot louder if i got around 7 cubes per sub. SO with that being said im going to make 1 ported box*walled* and tryn get my max dimensions. I was going to get crazy and fiberglass all the nukes and cranny's but im really not the best with just winging it and figuring out port lengths and cubes when its not a regular rectangle. On to my question...

Do you find the Sq. inches for port area before or after all the displacements.

EX.

I have 15 cubes to work with total 45x34.5x20 external dimensions for 2 18" BL's

Do i multiply 16(rule of thumb) sq inches x 15 cubes? I was told by FI to go with 14-16 sq inches of port per cube(i listen to rap)... Right now i have 70 sq. inches of port per sub in a 5.5-6 cube box(doesnt hit the lows like i want)

My current box is 19.25 deep 34.5 tall and 21 wide Per woofer.

-------------------------------------------------------------------------------------------------------------------------------------------

This would come out to be around a total of 200 some odd sq inches of port area for 2 18's.... does that sound right?

heres a vid of my set up.. although uncarpeted and not baffled its different now.

thanks for all the help and input.

[dtcharneski 0]

the rule of thumb is 14-16 sq in of port area to 1cuft of volume

[Duran 387]

Right now i currently have 2 boxes around 5.4 cubes per box @ 34 hz. I know i really could get the BL's to slam the lows alot louder if i got around 7 cubes per sub. SO with that being said im going to make 1 ported box*walled* and tryn get my max dimensions. I was going to get crazy and fiberglass all the nukes and cranny's but im really not the best with just winging it and figuring out port lengths and cubes when its not a regular rectangle. On to my question...

Do you find the Sq. inches for port area before or after all the displacements.

EX.

I have 15 cubes to work with total 45x34.5x20 external dimensions for 2 18" BL's

Do i multiply 16(rule of thumb) sq inches x 15 cubes? I was told by FI to go with 14-16 sq inches of port per cube(i listen to rap)... Right now i have 70 sq. inches of port per sub in a 5.5-6 cube box(doesnt hit the lows like i want)

My current box is 19.25 deep 34.5 tall and 21 wide Per woofer.

-------------------------------------------------------------------------------------------------------------------------------------------

This would come out to be around a total of 200 some odd sq inches of port area for 2 18's.... does that sound right?

heres a vid of my set up.. although uncarpeted and not baffled its different now.

thanks for all the help and input.

the rule of thumb is 14-16 sq in of port area to 1cuft of volume

He knows that very well.

[dtcharneski 0]

Right now i currently have 2 boxes around 5.4 cubes per box @ 34 hz. I know i really could get the BL's to slam the lows alot louder if i got around 7 cubes per sub. SO with that being said im going to make 1 ported box*walled* and tryn get my max dimensions. I was going to get crazy and fiberglass all the nukes and cranny's but im really not the best with just winging it and figuring out port lengths and cubes when its not a regular rectangle. On to my question...

Do you find the Sq. inches for port area before or after all the displacements.

EX.

I have 15 cubes to work with total 45x34.5x20 external dimensions for 2 18" BL's

Do i multiply 16(rule of thumb) sq inches x 15 cubes? I was told by FI to go with 14-16 sq inches of port per cube(i listen to rap)... Right now i have 70 sq. inches of port per sub in a 5.5-6 cube box(doesnt hit the lows like i want)

My current box is 19.25 deep 34.5 tall and 21 wide Per woofer.

-------------------------------------------------------------------------------------------------------------------------------------------

This would come out to be around a total of 200 some odd sq inches of port area for 2 18's.... does that sound right?

heres a vid of my set up.. although uncarpeted and not baffled its different now.

thanks for all the help and input.

the rule of thumb is 14-16 sq in of port area to 1cuft of volume

He knows that very well.

sorry didnt read the whole post. just the question in the middle.

[Duran 387]

Right now i currently have 2 boxes around 5.4 cubes per box @ 34 hz. I know i really could get the BL's to slam the lows alot louder if i got around 7 cubes per sub. SO with that being said im going to make 1 ported box*walled* and tryn get my max dimensions. I was going to get crazy and fiberglass all the nukes and cranny's but im really not the best with just winging it and figuring out port lengths and cubes when its not a regular rectangle. On to my question...

Do you find the Sq. inches for port area before or after all the displacements.

EX.

I have 15 cubes to work with total 45x34.5x20 external dimensions for 2 18" BL's

Do i multiply 16(rule of thumb) sq inches x 15 cubes? I was told by FI to go with 14-16 sq inches of port per cube(i listen to rap)... Right now i have 70 sq. inches of port per sub in a 5.5-6 cube box(doesnt hit the lows like i want)

My current box is 19.25 deep 34.5 tall and 21 wide Per woofer.

-------------------------------------------------------------------------------------------------------------------------------------------

This would come out to be around a total of 200 some odd sq inches of port area for 2 18's.... does that sound right?

heres a vid of my set up.. although uncarpeted and not baffled its different now.

thanks for all the help and input.

the rule of thumb is 14-16 sq in of port area to 1cuft of volume

He knows that very well.

sorry didnt read the whole post. just the question in the middle.

No problem

[christobear 0]

....so is it before or after displacement?

or did i miss the answer?

[RobClay 20]

Right now i currently have 2 boxes around 5.4 cubes per box @ 34 hz. I know i really could get the BL's to slam the lows alot louder if i got around 7 cubes per sub. SO with that being said im going to make 1 ported box*walled* and tryn get my max dimensions. I was going to get crazy and fiberglass all the nukes and cranny's but im really not the best with just winging it and figuring out port lengths and cubes when its not a regular rectangle. On to my question...

Do you find the Sq. inches for port area before or after all the displacements.

EX.

I have 15 cubes to work with total 45x34.5x20 external dimensions for 2 18" BL's

Do i multiply 16(rule of thumb) sq inches x 15 cubes? I was told by FI to go with 14-16 sq inches of port per cube(i listen to rap)... Right now i have 70 sq. inches of port per sub in a 5.5-6 cube box(doesnt hit the lows like i want)

My current box is 19.25 deep 34.5 tall and 21 wide Per woofer.

-------------------------------------------------------------------------------------------------------------------------------------------

This would come out to be around a total of 200 some odd sq inches of port area for 2 18's.... does that sound right?

heres a vid of my set up.. although uncarpeted and not baffled its different now.

thanks for all the help and input.

the rule of thumb is 14-16 sq in of port area to 1cuft of volume

He knows that very well.

sorry didnt read the whole post. just the question in the middle.

No problem

ass

[Kranz38 0]

ehh, okay, well im going to go with about 150 sq inches of port area? 12.098 cubes after port and sub displacement.

[Kranz38 0]

i came up with this, can someone double check it?