Quarter wave T-line Assistance

[realsoundillusion]

Hi guys,

 

Just read up on this subject and I am very interested. I am planning a build for an SP15x 6kw woofer in my Mk7 ford fiesta 1.4i ambiente install to be in the boot. tuned to about 30Hz.

 

So my understanding is that i need 11.3 ft3 t-line length. is this correct?

Max dimensions 36x 15 x 19

Aim is to install 1x15spx

 

1/4 Wave Tuning Point:			35.695520469
Port Frequency 1:			39.338312443
Port Frequency 2:			31.000783476
Box Frequency:			34.115315144
Line Volume:			3.247628556
Recommended Line Volume:			2.695749204
Chamber Depth (inches):			6
X-Sectional Area of Port Front:			52.752
Maximum X-Sectional Area:			52.752
Port Front Width (inches):			3
X-Sectional Area of Port Rear:			52.752
Maximum X-Sectional Area:			35.168
Port Rear Width (inches):			3
X-Sectional Area of Port Exit:			35.168
Minimum X-Sectional Area:			127.6
Port Exit Width (inches):			2
	Maximum Dimensions:
External Height (inches):			19
External Width (inches):			30
External Depth (inches):			14.832
Material Thickness (inches):			0.708

Will this design work. Please any advise and or help will be highly appreciated.