Discuss Cut port or install PR for SDX 10 in the DIY Speakers | DIY Subwoofers forum.
I purchased an occam audio SDX 10 downfiring sub about a month ago. The dimension are 12.5 x 14 x ...

**christmclean** · **02-12-12, 08:05 PM**

I purchased an occam audio SDX 10 downfiring sub about a month ago. The dimension are 12.5 x 14 x 16. The port length is 12 inches. I replaced the straight port with a flared precision port keeping the 12 inch length and had an issue with the amp not getting signal after reinstalling. Madisound was great and sent me a new keiga 5230 amp under warranty. The new amp has a plastic enclosure covering the amp internals making the width larger. Now the amp sticks out about a half inch out from the box where it hits the port.

Trying to decide if I should just cut the port down another inch so the amp would fit but then the space would only be less than an inch tolerance from the port flare to the amp, and the port would be 11 inches.

Or would it be possible to take out the port and put a 12 PR in the front of the box. It looks like the cutout would just fit but I dont know if the would work as I have not used any of the modeling programs before.

Any help on a solution would be appreciated.

**Mike P.** · **02-13-12, 01:18 AM**

Welcome to the forums!

The cheapest solution would be to use an elbow with the flared port and make the overall length 13" long to maintain the same tuning frequency as the 12" straight port. The port intake needs 3" of clearance. A 3" PVC schedule 40 elbow is a couple of dollars.

**christmclean** · **02-13-12, 03:41 AM**

Thank you, that is awesome. I like nice simple solutions. Off to home depot I go.

**Mike P.** · **02-13-12, 04:21 AM**

To get the required port length take the measurement through the center of the tubes and the elbow.

**christmclean** · **02-13-12, 03:08 PM**

I went to home depot and got an elbow. It just won't seem to work. There is just no room in the box for it. There is only 4 inches on each of the sides of the box and no room on the bottom where the driver is, and no room on the top where the port is mounted. I ended up just cutting off another 1.5 inches so I would have at least 1 inch of clearance to the amp. This should make my port length 9.5 inches. I kept the flared internal end but almost left a straight end just to try and get another half inch of port but figured the flare would be better to have on there. I am guessing my F3 is considerably higher than 26 which is what was published. Not much I can do about it with the small box and clearance to the amp.

**Mike P.** · **02-13-12, 06:53 PM**

Too bad it didn't work out. Are you using this sub for music?

**christmclean** · **02-13-12, 06:57 PM**

No I am using it for a TV system with a soundbar, so mostly movies. I thought that the SDX driver was good for playing up to 100hz to mate with the soundbar. Looks like I will be missing some of the low bass content, but a small box was wanted.