help with box specs

[904runner3.slow]

i have 4 memphis m class 12's, and i cant figure out how many cubes i should give to each sub. i have used a couple of different calculators, but it come up with 6.7 cubes for each sub, and that just doest sound right. if anybody could help me i would really appreciate it.

here are the subs specs if anyone might need them here they are.

Fs 29

Vas 3.3

Mms 136

Linear Xmax 0.54

Peak-to Peak Xmax 1.08

Qms 7

Qes 0.55

Qts 0.5

Sens. 88

Voice Coil Diameter 2

BL 18.5

Magnet Weight 50

Continuous Power 200

Maximum Power 400

Mounting Diameter 11

Mounting Depth 5.5

Driver Displacement 0.16

Click to read more...

 

[904runner3.slow]

Any one?

 

[Trixter 10+ year member]

8cu' with 62.5sq" of port tuned at 40hz.

http://www.memphiscaraudio.com/

 

[904runner3.slow]

But also on that chart there is another for the subs also and it recommends tuning of 36.

 

[Trixter 10+ year member]

tuning is ultimately the users preference....i would go about 28-30 myself. they just give two examples of 36 and 40 because the volume they give includes port (and sub) displacement. the lower you tune, the longer the port and the larger the box will be over all.