Design Needed for 2 Sundown Audio E-12v3(D4) with a Slot Port: Slot ported Enclosure design for 13w7: Aero vs. Slot port.not sure which to go with help me decide, this will be fun, just look!! Need help converting Slot port to aeroport measurement 52.0'sq x20' L. Attach a port connector PCI case slot bracket and connect to your motherboard headers. Choose serial, USB, and FireWire ports. Due to the COVID-19 crisis, some orders may be delayed in fulfillment and shipping. Our sales team is able to advise on product availability and hardware recommendations. Communications and networking riser (CNR) is a slot found on certain PC motherboards and used for specialized networking, audio, and telephony equipment. A motherboard manufacturer can choose to provide audio, networking, or modem functionality in any combination on a CNR card.
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The OBD Port, is the location where you can plug in any OBD tool into the vehicle to pull vehicle information. It is also the primary location of tracking devices such as dongles as the port provides ongoing power to the device. There are two generations of OBD ports, OBD1 and OBD-ii aka OBD2. To determine which one you have, if your vehicle was built and sold in the US after January 1st, 1996 you will have an OBD 2 port.
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Comments
- edited February 2019I always use winISD to convert. Adjust the tuning to match your 3' X 3.65' then select square port and enter your target height and width to get the length. Online calculator can do the same thing. http://www.mobileinformationlabs.com/HowTo-1Woofer-Box-CAL%20Port%20lenth%201.htm
- How about a spreadsheet from our friend Paul Carmody?HTHJim
- As Wolf posted: Pi x r^2 = L x W so:
3.1415 × (1.5')^2 = 7.068 in^2 (~ 7 sq in)
If your slot port width is 7', then the slot port height would be
7 sq in / 7' = 1' (7' wide x 1' high)
Or
7 sq in / 3.5' = 2' (3.5' wide x 2' high)
Etc - the area of the slot port should be the same as the area of the round port. Keep the length same.
If you want to really optimize, usual the round ports are in the center away from the walls, whereas slot ports use the walls as one of the side - this does affect the lenght of the port for a particular tuning - Jeff B has a formula for calculating how much of the lenght should be altered if you are near a wall rather than away from a wall (at least twice the diameter of the port... Or just skip it, you will be in the ball park - The other rule of thumb was to keep the height to width ratio no more than 1 to 7, (1 to 9?)I can't remember the exact end correction/ boundary factor for the slot port, but I've used port length -1 port height multiple times and been very close to the box model.John H, thanks to JP I did get that email
- Thanks for the answers, all. They've helped clear up the concept.
- Pretty sure that is 1 to 8 ratio. Rory relayed that info.
- Here's a picture that shows how the K value changes with slot port location. It was taken from this PETT thread: http://techtalk.parts-express.com/forum/tech-talk-forum/66368-q-slot-port-length.
- How are these calculations or examples affected when a speaker has those old fashioned slot vents sometimes found on early speakers? I'm referencing my old EV speakers that have roughly (4) 1/4' wide by 10' vents, 3/4' deep on the back of the cabinet. Was there a specific purpose for those vents, as opposed to a single vent of round or rectangular shape? Can the above vents shown by Ed Perkins be used if you desired to seal up the back of such a speaker?