Dreadeknot super sona sub project phase 1

Nice. What's the planned finish?

SOON AS I CAN GET MY HANDS ON THE SUB AN WOOD AN TERMINALS
I ALSO PLAN TO COAT THE WHOLE THING IN A GOOD THICK LAYER OF duratex paint BLACK
WILL POST MORE WHEN FINISHED

Curious why you chose such a high tuning? Did you model this sub with any software?

NO SOFTWARE WITH THE SUB
HAVEN'T EVEN GOT IT YET, BUT AFTER YEARS OF PREBUILT SUBS LIKE POLKAUDIO AN OTHERS NOT GIVEING ME THE BOOM I WANTED I THOUGHT ABOUT TRYING CUSTOM BUILTING MY SUBS
AND HIGH TUNING
I CURRENTLY HAVE CAR SUB BOX RUNNING IN MY HOME THEATHER THAT IS AT 32HZ AN I LOVE HOW IT SOUNDS
SO I WANTED TO LOW THE HZ FOR MY NEXT BUILD A LITTLE AT A TIME THE LENGTH OF PIPE NEED TO HIT 20HZ IS 33.09IN AN WHILE I DONT CARE HOW IT LOOKS IF IT STICKS OUT OF THE TOP OF THE SUB
MY ROOM ACOUSTICS ARE WITH LOW frequencyS AN A FRIEND LET ME USE HIS OLD CUSTOM BOX IT WAS A 4
4 CUBIC BOX TUNED AT 15HZ AN MAYBE IT WAS TO LOW OR TO BIG BUT THE BASS SEEMED NOT TO BE THERE FOR MOVIES OR MUSIC THEN AGAIN COULD BE I DIDN'T HAVE Balanced / Unbalanced Line Level Converter TO GET THE INPUT RIGHT SO I START AT 28HZ AN WORK MY WAY DOWN UNTIL HIT MY SWEET SPOT.

NOT TOO LONG WINDED

BUT THATS WHY 28HZ

Yeh. That's a pretty high tune. I used a 7" diameter port for my 15" cabs. Seems like 5" may be pushing it. But maybe with a tune that high, you won't be moving enough air volume for it to matter. You should run some WinISD modeling to make sure you're getting what you want. I assume this will be for music, not TV/movies, right? Rule of thumb is to tune to ~ Fs, which is 19.5Hz for this driver.