with the nature of the sub...i can have them in a regular ported box tuned to 50hz and still hit the lows wellthis an SPL box?
Bingo. When you look at the graph of a bandpass system (or a bandpass filter in a crossover circuit for that matter, albeit a different topic), it's going to resemble a plateau. The first is around the tuning of the ported, the second is due to the sealed enclosure. Very difficult to get right, but I'd trust 80 any day of the week for a design.with a 4th order there are 2 peaks
first peak is low due to the sealed side.
second peak is high due to the ported side.
gotta see pics //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifWell got bout 90% of the box done today. Took a lil more time than i planned and painted more than i thought. I dont have my camera here but im going to try and get pics somehow.