STF-3 Vs. VTF-3 Vs. Home made sub?????

[bizombb]

Has anyone heard a STF-3? How does it compare to a VTF-3?

Also Im thinking about building my own 15 inch powered subwoofer. Any comments or predictions on performance?


Sub http://www.partsexpress.com/pe/showdetl.cfm?&DID=7

Power handling: 800 watts RMS/1,100 watts max
Impedance: 4 ohms
Fs: 19.93
Xmax 20.5 mm
Sensitivity: 91.7 dB 2.83V/1m
Vas: 7.79 cu. ft.
Qts: .38

Amp http://www.newark.com/product-details/text/mcm/html/50-6282.html

Power output (RMS): 240W @ 8ohm, 360W @ 4ohm •Minimum speaker impedance: 4ohm •THD: Less than 0.1% @ 250W, 4ohm •S/N ratio: Greater than 100dB

[bizombb]

forget to mention the Sub will be in a sealed box of 2.5 to 3.5 cubic feet internal volumne using 1 inch thick wood in either downfiring or corner loaded configuration.

[JimmyTango]

Partsexpress.com link does nto work.