Posted March 29, 201213 yr Don't have anything to show yet, but here is the plan:8 cube box with an 8" aero port. 3/4 mdf all the way around with double layered top. 8" PVC port flared and flush mounted. 2x4 going from front to back, and top to bottom. Going to use bolts through the side as terminals. Woofer will be either an 18" UFO BTL or HDC3. Tuning will likely be 30hz. Amp is an old school Memphis 1500w. Old school meaning back before they wired to 1 ohm. Stock alt holds at 14.1 v with the red top under the hood so electrical won't be upgraded. I'm getting the wood and building the box Sunday. Opinions? Tips?
March 29, 201213 yr Author Hoping to have this done by the 15th so I can show off when the sound lab visits.
March 30, 201213 yr pictures or this thread is worthlessHe's supposed to post pictures of things that haven't happened yet?
March 30, 201213 yr pictures or this thread is worthlessHe's supposed to post pictures of things that haven't happened yet?once hes able to not right now lol you must be a SMD member too bringing your gay attitude here lol
March 30, 201213 yr pictures or this thread is worthlessHe's supposed to post pictures of things that haven't happened yet?once hes able to not right now lol you must be a SMD member too bringing your gay attitude here lolLawl. You cannot be serious.
March 30, 201213 yr A few things. I wouldn't do a box that large with higher power woofers, they don't like it to much.Biggest thing, your port area. I'd go WAY up with it, to about 16^2-20^2 of port per cube.I would do 7^3 of air space with 20^2 per cube tuned to about 38Hz since you will be on the lower end of RMS on big woofers. And the large port area will allow the woofer to still drop low, while maintaining high output.
March 31, 201213 yr Author Alright I'm completely lost with the ports. I make the port longer, yet the port area doesn't change. Could someone figure out the ports I would need for a box within those dimensions?
April 1, 201213 yr Port area has nothing to do with the length of the port.It is the size of the opening. 14" x 3" would be 42 sq in
April 1, 201213 yr I don't know what space you have to work with.But based on Drew's recommendation and a minor tweak:22.5 H 38 W 24 DSquare port: 17 x 7.5 with 24 length 7.06 cft net127.5 sqin port area18.07 sqin per cube38.2hz tuneThat is a lot closer and best I can come up with in 5 minutes lolYou can tweak around on that to get exactly what you need.
April 1, 201213 yr Author Does that port length include the 90? Or is that port opening to back wall, then the 24?
April 1, 201213 yr Author Well I'm looking for sub and port facing up, it's in the back of an SUV. The box will be against a wall on all sides, so only option would be up.
April 2, 201213 yr I'm working on a box with an almost square port and one sub, both up. Although, the sub is square.. I think it looks fine.
April 3, 201213 yr In my tribute getting the port as far back as possible is the loudest. Why not a slot port port facing up on the back wall?
April 3, 201213 yr Author Figured it out using Audioques size recommendations. Box is going to be 6.3 cubes after all displacements, 36hz tuning with a slot port. 87 sq inches of port. Bought the wood today, but I need a new blade on the saw Double baffle on top with 2x4 bracing. Port and sub firing up. Oh and if it isn't clear yet, it's going to be an HDC3 18 Anyone want to buy my old SA12's? Still as stiff as they were on day one! Edited April 3, 201213 yr by djtomczak
April 3, 201213 yr Author Cut marked out.Found a program that maps out the most efficient cut pattern, worked out nicely.
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