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MyKuL
02-23-2010, 11:50 PM
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!

http://img.photobucket.com/albums/v486/mykul_16/Boxes/box2-1.jpg

http://img.photobucket.com/albums/v486/mykul_16/Boxes/box3-1.jpg

http://img.photobucket.com/albums/v486/mykul_16/speakerbox-1.jpg

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] (http://www.audiojunkies.com/product/848/mach-5-audio-mj18-reviews)
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.

bassman3
02-23-2010, 11:59 PM
iv always questioned subwoofertools.

MyKuL
02-25-2010, 03:08 AM
anyone?

d-REW
02-25-2010, 08:41 PM
port area kinda low

MyKuL
02-25-2010, 10:33 PM
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
02-25-2010, 11:48 PM
I've always been told 16 per cube is best. And yea low port area