Hello Everyone,

I have a pair of old school 8's that I figured the best thing for me to do with them is to put them in a box under my bench seat in my 2000 f150 x/cab.

I took some simple measurements of the space under the 70 of the 70/30 split bench and from what I can come up with is about 1.3 cubic feet of space (without the subs). I was thinking of a ported enclosure with the subs facing downwards, and the port (I dont know what type/size/length/freq.) facing the front of the truck.

Aside from the port, here is where I get lost. The only information I have on the subs is what is printed on the sticker on the magnet. I tried googling it and doing some digging but to no avail. I guess they are just too old.

This is what is printed on the sticker.....

Earthquake
Model EQ-88
48 OZ Magnet
8 Ohms
2" Polymide voice coil
180 watts
Manufactured in USA by Earthquaks Sound Corporation
Professional


It would be great if I could find some help with this.

 

If you wanna do a ported enclosure, your best best is an aeroport to the side. After sub and port displacement, your probably looking at about 0.9-1 cubic foot of airspace which can work.

Using a 3" aeroport, if you have roughly a cubic foot of airspace, a port 12" in length will give you a tuning of roughly 38hz

 

When you say "to the side" do you mean.... firing out of the side of the box into the door..... or to the side of both speakers firing foreward?

My maximum depth is 11" (if the port were to fire foreward) so would I have to go with a larger/shorter in this case?

Is 38hz reasonable for 8"ers? I just didnt think that they could perform well at that frequency, but if they can than woo frigen hoo.

 

Port to the side means towards the driver door. 38hz should be a good frequency for those 8's. Anything lower, and they wont perform well