posted
How in the heck would i be able to port a truck box that is the kind that goes behind a benchseat of a regular cab truck? The box is about 7" deep on the bottom.
posted
how do you do it? you don't. you can't just go and shove a port into a prefab sealed box. it'll sound like crap and won't be much/if any louder.
you're going to want to build a ported box, which would be bigger and louder...
------------------ I respect any sub that can make me pass out.
posted
I guess i didn't make myself clear so you would understand me. The box will be made myself and the box is a wedge shaped box. The dimensions are 42.25" long, 13.75" high, 2" deep on top, and 7.5" deep on the bottom. Those are inside dimensions using 3/4" MDF. Where would i put a port in a box like this?
posted
You could put a port running in from the front and bend it right away and run as far accross the inside as you need. That may work but you will have to work around the basket/magnet of the speaker.
------------------ rybaudio@hotmail.com
The goal: Accurate musical reproduction in the mobile environment
Posts: 3961 | From: State College, PA | Registered: Sep 2000
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posted
i did understand you. you said "port a truck box". that says nothing about building it. you asked for help, and when a question isn't real specific, you won't get a good answer. now that you have specified as to what you are planning. yes. do as rybaudio said, and use pvc with a 90degree in it to get the length you need. to measure the length measure the middle of the pipe to the middle of the 90 then down the middle of the next pipe. NOT the edges. hope this provides help. next time be clarifiy your desires, your questions will get answered quicker =)
------------------ I respect any sub that can make me pass out.
[This message has been edited by [meph] (edited 01-23-2001).]
posted
Given that your dealing with a very tight enclosure, interior space wise, you should consider using a slot port(s) to solve the problem.
You can achieve this by using the baffle that the subs are mounted as one of the slot port walls and run the slot up the interior side of the baffle with the slot port opening at the bottom of the enclosure. Enclosure's, especially shallow pickup enclosure's don't allow much room interior wise for the use of PVC tubing, slot ports offer more options with regards to port placement.
I just did this for an enclosure for a Jeep Wrangler which I shipped to a guy in CO and the guy was very satisfied with it.
posted
Ok, thanks for the replies. I could put a port opening on the bottom of the box where it is the deepest and the port would be firing down. I have a good 6" of clearance between the box and the floor of the cab so no problem with something blocking the port hole. Now i need to find out the dimensions of the port. The bottom is 7.5" deep so i could go 2" wide and 2" deep. How long would the port need to be for about a 40hz tune? The sub is a 10W3 in a 1.5cf box. thanks
posted
A slot port for one 10w3 would be the same as a 3" diameter port x 5 3/4" length for a tuned 40Hz. So, the equivalent would be a slot port of 2.66" x 2.66" x 5.75" I.D. Slot Port. However, you can change the slot port to whatever dimension you need to fit the application keeping in mind that the surface area and the center line length remain constant. Just don't make the slot port to thin or you will get port noise.
Is your intent to put the port outside the enclosure? If that is the case, then you have to keep in mind that the center line length of the port has to remain constant in order to maintain the correct tuning of the port.
posted
Well then, you should be good to go, also, to make putting the port in position alot easier, don't totally build the enclosure. Leave the back panel off and place the port in the location you want it to be, this way will allow you to install the port with what ever type of fastener's or glue you intend to use. Take your time and the job will turn out better and have fun!!
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