level 5 18s box help

[longdan13]

Im planning to build a box for 2 level5 18s m1. Im useing 1 inch mdf with double baffle.Are these deminsions good.as far as port deminsions and size.i only listen to rap. Its going in a 94 s10 blazer

Unit of measurement: Imperial

Wood Thickness - 1 inches

Displacements - .52 cubic feet

Frequency - 31.94 hz

Box Length - 48 inches

Box Width - 37 inches

Box Height - 22 inches

Port Length - 20 inches

Port Width - 30 inches

Port Height - 6 inches

Gross Volume(Feet) - 18.63 ft³

Gross Volume(Litres) - 527.54 L

Net Volume(Feet) - 15.3 ft³

Net Volume(Litres) - 433.04 L

Port Displacement(Feet) - 2.81 ft³

Port Displacement(Litres) - 79.57 L

Port Area - 180.0 in²

Port Area(Metric) - 1161.29 cm²

Port Area Per Foot - 11.76in²

Port Area Per Litre - 75.87cm²

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[bgowdy 5,000+ posts]

Im planning to build a box for 2 level5 18s m1. Im useing 1 inch mdf with double baffle.Are these deminsions good.as far as port deminsions and size.i only listen to rap. Its going in a 94 s10 blazer
Unit of measurement: Imperial

Wood Thickness - 1 inches

Displacements - .52 cubic feet

Frequency - 31.94 hz

Box Length - 48 inches

Box Width - 37 inches

Box Height - 22 inches

Port Length - 20 inches

Port Width - 30 inches

Port Height - 6 inches

Gross Volume(Feet) - 18.63 ft³

Gross Volume(Litres) - 527.54 L

Net Volume(Feet) - 15.3 ft³

Net Volume(Litres) - 433.04 L

Port Displacement(Feet) - 2.81 ft³

Port Displacement(Litres) - 79.57 L

Port Area - 180.0 in²

Port Area(Metric) - 1161.29 cm²

Port Area Per Foot - 11.76in²

Port Area Per Litre - 75.87cm²

the port part of your measurements confuse me. i see the 11.76in per cube, and i wonder how you got that? 180sqinch^3 / 18.63 is 9.66 per cube. But doing 180 / 15.3 is 11.76. I thought that you figure this by the total gross volume of the enclosure. it again i have been confused by this for a while but didnt understand which way was correct.

 

[longdan13]

I used a box tune calculator to get those numbers.i just kept playing with the deminsions to get the hertz around 30-32 and the inches^2. Of the port Around 180- 200.