SQmonster

iTrader: (2)

I have a DD 3512 d4 in a 1.9 cf box with a 4" round x 10.5" deep port. The port noise is horrible. I have rounded the edges, but no change. Any idea's?

jalat

iTrader: (6)

2.25 cubic feet with a 6" aero port would be optimum

SQmonster

iTrader: (2)

Thank you for the responces.

@ 2.25 cubes, how deep of a 6" port would you suggest? If I keep it at 1.9 feet, how long would the port be?

We have a fantastic calculator for slots, but round ports...

DeadlySones

iTrader: (4)

What frequency are you trying to tune to? You could use the 12volt site for your calculations.

jalat

iTrader: (6)

try the larger enclosure first (2.25 cubic feet) with the 4" port. if you want to determine the length of port for a desired tuning, i like to use this website:

PSP account login screen


are you using a homemade aeroport (eg PVC pipe) or a machine aeroport? I have noticed thru personal experience that homemade ones will create more port noise than machined ones

if this all doesn't work, then more port area is needed.

SQmonster

iTrader: (2)

Thank you for all of the help. It has given me more options.

The port calculation link told me that the port that I was using would be fine, tuned to 36.7 hertz. I rounded the hell out of it too. I then took a 6" port and stuck it on top of the opening to provide a horn effect on top of the original port. It's made a huge difference. I just need to figure out a way to keep it in place.