Jpshockster Posted February 10, 2017 Report Posted February 10, 2017 Can someone please help me with my box design? I built one box with a slot port that was 1" x 4" x 21" long but because of my enclosure size it had to fold back and fourth to get the length. the box seems to have a lot of port turbulence. I'm now considering a round port however the spec for the sub recommend 4"^2 at 32hz using a 3" port consumes too much volume and raises my tuning and using a 2" gives me the desired tuning but is under the suggested 4"^2 by .86"^2 will this cause a windy port? My outside dimensions are 6" tall x 17.75" wide x 10" deep ( the depth can increase by 1" at the top and 2" at the bottom if absolutely necessary. I am trying to tune around 45hz as this is going into a golf cart with the sub and port firing down. (there will be 1.5" between the bottom of the box and the surface the box sits on) so 1.5" from port face to surface and .625" from surround to surface. I am open to suggestions in any direction Note: sub and port fire down so they are protected form moisture and people.
ckeeler11 Posted February 10, 2017 Report Posted February 10, 2017 Thats a really tight space, might be better off going sealed.
Jpshockster Posted February 10, 2017 Author Report Posted February 10, 2017 1 minute ago, ckeeler11 said: Thats a really tight space, might be better off going sealed. I was afraid that's what I would hear......not cool
Joe X Posted February 11, 2017 Report Posted February 11, 2017 Sealed will result in a virtually non existent lower end with that sub, more so on a golf cart where usually no cabin gain exists. Post what's the amp.
kam311 Posted February 11, 2017 Report Posted February 11, 2017 I squeezed out a little more port area and the measurements seem to work. Its a bit more of a square port idea. This is a rough idea but maybe you can make it work. I also used .5 in wood which makes the difference in this case. so far... HU- pioneer DEH-P59001B Amp- crescendo BC2000D Wire- 1/0 awg welding lead Electric- Big 3 ^same wire Subs- 2 Obsidian Audio 12 d4's Box 4ft^3 ported at 33hz. designed by Ram-Designs
Jpshockster Posted February 22, 2017 Author Report Posted February 22, 2017 On 2/11/2017 at 2:49 PM, kam311 said: I squeezed out a little more port area and the measurements seem to work. Its a bit more of a square port idea. This is a rough idea but maybe you can make it work. I also used .5 in wood which makes the difference in this case. Thanks for the reply Kam311, I ended up making the box a little deeper and using 2.5" pvc pipe. .31^3 @ 46.15hz and it sounds much better than my first attempt
kam311 Posted February 23, 2017 Report Posted February 23, 2017 Awesome, I'm glad you didn't give up on it! so far... HU- pioneer DEH-P59001B Amp- crescendo BC2000D Wire- 1/0 awg welding lead Electric- Big 3 ^same wire Subs- 2 Obsidian Audio 12 d4's Box 4ft^3 ported at 33hz. designed by Ram-Designs
neuspeedescort Posted February 23, 2017 Report Posted February 23, 2017 i was going to suggest an external port. if that was an option that would work. also if you built a mounting brace at the end of the port tube and round it over that can help with port noise. since you're still on the smaller side of the recommended.
Jessica Posted February 23, 2017 Report Posted February 23, 2017 in my experience round port dont like sharp bends especially right at the exit. You may have better luck than i did,. Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13
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