7 cube box, what measurements for port...?

[86yota 10+ year member]

Building a 7 cube or so box tonight for 2 15" Orion XTR Pro Prototypes. I dnno how wide/long port should be tho I want it tuned to 33hz. Can anyone help?

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[sku 10+ year member]

Building a 7 cube or so box tonight for 2 15" Orion XTR Pro Prototypes. I dnno how wide/long port should be tho I want it tuned to 33hz. Can anyone help?

7 cubes after displacement?

This has worked for me:

http://www.carstereo.com/help/Articles.cfm?id=31

Use 12-16 sq. inches of port per cubic ft.

I'd use at least 100 sq. inches of port..

 

[bamaboy 5,000+ posts]

for 7 cube box, 34hz tuning its like 23.25 long and 107.25 sq in port

thats what my box is going to be, dont know about 33hz, the port would be a tad bit longer

 

[jeepintn 10+ year member]

for 7 cube box, 34hz tuning its like 23.25 long and 107.25 sq in port
thats what my box is going to be, dont know about 33hz, the port would be a tad bit longer

bama, sry to be offtopic, but what are your plans now? why going to a smaller box?

 

[86yota 10+ year member]

Uh oh, I only made it 15" long that prolly made my tuning in the 40s?