Aero Port Tuning Length Calc
According to that calc which is more accurate with aero port length tuning than Torres with 1.78 cubes and 2 4" aeros 31" long is 34hz tuning. Those ports are going to be very long.
Are you going to be firing the ports to the side or are you putting 90 degree elbows in them? Why is the box so shallow and wide?
Will the sub even fit in that box without the magnet hitting the back of the box? With the top depth being 5.25" and bottom depth being 10.5" the depth at the very center of the box will be about 7.75" minus wood thickness so even smaller than that and with the width of the motor I am not sure it will fit in there.
Just want to make sure its going to work for you before you build it and find out it doesnt. That would suck.
Also I would probably personally go for 2 cubes net if you can fit it tho it isnt much larger than 1.8 cubes should do pretty good either way.
And I see you are using 1" thick wood but baffle thickness is .75"? Are you doing 1" on all sides except the front baffle I am confused a little bit.
Which face of the box is the sub going on and which face for the ports?