Can someone verify my design?

[MyKuL 10+ year member]

I tried to design a box with subwoofertools and the RE Audio box designer, can someone verify for me? It's been a WHILE since I've done this!

My sub's specs:

Mach5 MJ-18 4 Ohm

Power Handling: 600 watts RMS

Sensitivity: 93.4db (2.83 volts)

Impedance: 4 or 8 Ohms (SVC)

Outside Diameter: 46cm (18 1/8")

Mounting Diameter: 41.9cm (16 1/2"")

Depth: 20.3cm (8")

Recommended Box Sizes

Sealed: 80 litres (2.8 cu. ft.)

Ported: 128 litres (4.5 cu. ft.) 30Hz tune

EBS: 250 litres (8.8 cu. ft.) 18Hz tuning

T/S Parameters - MJ-18 - 8/4 Ohm

Fs = 30.4 / 28 Hz

Re = 7.2 / 3.2 Ohms

Qes = 0.39 / 0.34

Qms = 3.41 / 4.99

Qts = 0.35 / 0.31

Mms = 219 / 229 grams

Rms = 12.3 / 8.1 kg/s

Cms = 0.100 / 0.14 mm/N

VAS = 243.8 / 208.4 litres

Sd = 1029.2 cm2

Xmax = 12 mm

Cone Diameter = 36.2 cm

Mach 5 Audio MJ-18 [audiojunkies]

My amp is an Alpine MRP-M1000.

mono subwoofer car amplifier

600 watts RMS x 1 at 4 ohms (1,000 watts RMS x 1 at 2 ohms)

variable low-pass filter (50-200 Hz, 24 dB/octave)

variable bass boost (0-12 dB at 50 Hz)

subsonic filter (15 Hz, 24 dB/octave)

Any comments, suggestions or advice are very much appreciated.

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[bassman3 10+ year member]

iv always questioned subwoofertools.

 

[MyKuL 10+ year member]

anyone?

 

[d-REW 10+ year member]

port area kinda low

 

[MyKuL 10+ year member]

port area kinda low

Maybe I'm doing the math wrong, but I get 10.01 cubic inches of port area per cubic foot... Isn't it recommended to use in between 5-12 cubic inches of port per cubic foot?

 

[on1wheel01 10+ year member]

I've always been told 16 per cube is best. And yea low port area