very similar to the forth order except the front wil be very small 1.5 cu with the 13x7 port lined up exactly to your cut thru dont make the port very long you want it tuned high 100hz or so the back section will be the large section 4 -5cu tuned around 35-45hz the lower the more musical the higher the louder. just match the length on the 6in aeros and get them to line up with the 6x9 holes recommened making a 6x9 cut out to cover the hole and have the aero come thru helping to seal the pressure to the cabI'd love to see a design of how that would look...Any takers??
