Alright, I currently have a pretty big sealed enclosure. It's glassed into the rksport speaker enclosure. The problem is that I am not getting the low end response that I want. I have tried for hours to "tune" the amps, but with limited success. I've searched to find that ported boxes get better low-end bass. What is the simplest way to port a sealed enclosure without ripping the whole thing out of my trunk?
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The truth of the matter is, there is no easy way.
A ported box has so many different calculations it's not even funny. Air has to be redirected, port size has to be determined, and then you have to tune your amps/enclosure to a certain frequency no less!
Also, if your subs are at optimum airspace in the sealed enclosure, you can't port it and have them still be there. My D315's are 1.75 CUFT sealed which goes up to 2.75 Ported!
If you want to get more low end, try filling the box with insulation and well... maybe think about a new setup "/
The first time I tried porting a sealed box, I drilled like 20 holes in it with a uni-bit and was completely surprised when it sounded like @!#$ =P Don't ruin your good glass box with the same mistake =)
There's a thin line to be crossed, when the upgrades to your vehicle increase your chance to get tickets by an amount exponential enough to stop worrying and build the fastest, loudest car you can.
i would say the "easy" way would be to take a hole saw and cut some holes and put aero ports in. but good luck figuring them out.
and i dont think that the rk sport box is the correct size for the subs either see if oyu can figure a way to make it the right size by building inside of the box. this way you could probly do a slot port as well
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CALCULATOR
here figure out your airspace and all that type it in the calculator make sure to say waht type of port you are using and it will give you numbers not hard at all.
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Thanks for the help. The rksport box is only a shell, and there is an actual box built for the subs. It's just glassed to the box to get a seal. Changing the setup is not an option at this point, as i have wayyyy too much invested by now. The aero ports were the original thought, but i just was not sure how much that would affect the response.
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what do you mean by response? (im kindof a newb to technical term) but i would say if you want more umff go ported but i trust you know what your doing with tuning the amp (maybe not) but try changing up the lpf and the hpf on your headunit even and other things like that. maybe take it to a local shop and have them talk to you about it and explain things alot more.
also if you take the box out of the car i would do a slot port its not hard to make a sealed box into a slot port but just make sure you have the right airspace and all that.
if you post specs of how much space they need and all that ill look into it but by no means am i a professional. ill do what i can but im no pro.
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The space between trunk and cabin is sealed. It was with the last box I had as well, but that box had a huge sound. This one is great at the mid-range bass, but not the super-deep, "ricer rattle" level.
I dont know if there is a setting on the amps/headunit i HAVEN'T tried to adjust at this point!
I will get specs on the box tomorrow, though, to help in getting the right information.
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ok ill be captain obvious what woofers and amps are you running.
I'm going to ride captain obvious like a bucking bronco and second what Sndsgood says. The box design on that RKSport shell is funny. You've got 2 subs forward, and 2 subs, one on each side, facing each other.
Anton - I wouldn't give advice if you don't know what you're talking about. It's not as simple as slapping a port onto a sealed box to give you a ported box. There's so much more going on with this than just using a calculator. Do you know the difference between 30 hz and 40hz for a port tuning? Do you know how cancellation works? What about phase?
As far as equipment, all Walmart brand, all the way!
Just kidding (and sorry to anyone that has walmart stuff). I have 2 Memphis M3 12" with 2 Memphis PR Class D 1000w amps. The subs are in the front facing slots, not the sides. I'll post pics after work.
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Here's the setup from the front. I had it on my computer, so i figured what the hell. Here it is:
I'll get dimensions and box pics up when i get home.
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I would try to build another box within the RKsport. Really, you can't take a sealed box made to specs and turn it into a ported box made to specs.
Otherwise, if you know anyone that does paint, glassing your box out isn't that hard. Just time consuming.
There's a thin line to be crossed, when the upgrades to your vehicle increase your chance to get tickets by an amount exponential enough to stop worrying and build the fastest, loudest car you can.
Lanman31337 - Cavfire wrote:
Anton - I wouldn't give advice if you don't know what you're talking about. It's not as simple as slapping a port onto a sealed box to give you a ported box. There's so much more going on with this than just using a calculator. Do you know the difference between 30 hz and 40hz for a port tuning? Do you know how cancellation works? What about phase?
i never said i knew what i was talking about and never said what he should tune it at(i actually said i was no pro). i just gave some suggestions and a calculator to get him started. i said figure out the numbers punch them in and it will give you numbers. never said what numbers to put in.
sorry but i got sorta angry at this one, i hate it when i get called out on sumthing that i never said.
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due to the location of the box and having some of the car behind the subs im betting allot of the issue is with cancelation and with that changing an eq setting and crossover setting is worthless. id make a small box that you could set behind the rksport one by the trunk seperater and see how it sounds, if you hear more bass then its cancellation. if it doesnt get louder its probalby another issue.
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Anton Miller wrote:Lanman31337 - Cavfire wrote:
Anton - I wouldn't give advice if you don't know what you're talking about. It's not as simple as slapping a port onto a sealed box to give you a ported box. There's so much more going on with this than just using a calculator. Do you know the difference between 30 hz and 40hz for a port tuning? Do you know how cancellation works? What about phase?
i never said i knew what i was talking about and never said what he should tune it at(i actually said i was no pro). i just gave some suggestions and a calculator to get him started. i said figure out the numbers punch them in and it will give you numbers. never said what numbers to put in.
sorry but i got sorta angry at this one, i hate it when i get called out on sumthing that i never said.
You tell the dude to cut holes into it and stick in aeroports. Then you tell him it's easy to make a sealed box into a ported box. Kudos to you for saying you aren't a professional, but sometimes half-information is worse than no information. Now some of that stuff you did say, and I don't want this to become a pissing match and for you to get butt-hurt. A few days ago you were asking a billion questions about boxes and what sub you should go with, and now giving partial information that could cause more harm than good.
Lanman31337 - Cavfire wrote:Anton Miller wrote:Lanman31337 - Cavfire wrote:
Anton - I wouldn't give advice if you don't know what you're talking about. It's not as simple as slapping a port onto a sealed box to give you a ported box. There's so much more going on with this than just using a calculator. Do you know the difference between 30 hz and 40hz for a port tuning? Do you know how cancellation works? What about phase?
i never said i knew what i was talking about and never said what he should tune it at(i actually said i was no pro). i just gave some suggestions and a calculator to get him started. i said figure out the numbers punch them in and it will give you numbers. never said what numbers to put in.
sorry but i got sorta angry at this one, i hate it when i get called out on sumthing that i never said.
You tell the dude to cut holes into it and stick in aeroports. Then you tell him it's easy to make a sealed box into a ported box. Kudos to you for saying you aren't a professional, but sometimes half-information is worse than no information. Now some of that stuff you did say, and I don't want this to become a pissing match and for you to get butt-hurt. A few days ago you were asking a billion questions about boxes and what sub you should go with, and now giving partial information that could cause more harm than good.
yes i want to end this because its getting off point but i was asking about boxes. i also learned alot of knowledge from that. i found out about the calculators and my box that I designed works perfect. however i dont know it all and i stated that.
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i didnt mean to open a thread to start drama. i just want my bass not to suck
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you are getting way too much cancellation . Sndsgood is dead on. Also how big is the box you have built to attach to the rk box. If its too big you will not have any low end .
Well, here are the best pics i could get:
The box is 30.5" W x 16.5" H x 18" D
Hope this helps everyone. And thanks for all your helpful information.
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that box sounds absolutely huge! way too big for a sealed enclosure for two 12's
"I did it because I wanted to see what it would look like. You should be greatful that I even told you that it would look good. If your to dumb to use photoshop and change the color of your own car then you don't need to see it changed. I'm not going to give my work away. I'll sell the pic to you though for $15."-Adam Kalin
^^JBO is about not being that guy
that box is extremely too big that is your problem right there. you are almost free airing them.
any suggestions on how much to cut down? Height and width are pretty well set, but i could change the depth.
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go to memphis audio's website and find the data sheet fr your subs, it should ive you the optimum enclosure volume for those subs. then do the math and figure out how deep the box should be.
"I did it because I wanted to see what it would look like. You should be greatful that I even told you that it would look good. If your to dumb to use photoshop and change the color of your own car then you don't need to see it changed. I'm not going to give my work away. I'll sell the pic to you though for $15."-Adam Kalin
^^JBO is about not being that guy
you can glue 2x4s in the box to take up volume. BUT your box is around 5.25 cubes with the dimensions you gave me. You;ll need to get it down to around 1.5 cubes each. with sub displacement it should take up roughly a .25 cube. you are looking at roughly 2 cubes of fill. thats alot.
