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Thread: Box desing help!!! |
    
Silver Member Username: Goose5714
Post Number: 497
Registered: Feb-06
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| Posted on Tuesday, February 20, 2007 - 09:31 pm: |
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So i have a 500w bash plate amp i'm going to be pairing with a dayton titanic mkIII 12inch. This system will be in my room at home for now but will be going with me to my dorm next fall, so i can't have a huge box. I would like to go ported as i am a huge basshead thx to my car audio experience, but i don't want it to be sloppy for music listening. From what i've gathered most HT setups feature lower tuning so it shouldn't be a problem.
The other thing i've noticed is that many HT boxes use tube ports....is this a must??? i am more apt at boxbuilding with slot ports...wondering if there's any reason not to slot port it.
So basically what i'm asking, is how big of box, what tuning, what kinda port i should use, and where i should place the sub (down firing, on same face as port, on opposite...etc). help would be appreciated! |
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Silver Member Username: Goose5714
Post Number: 498
Registered: Feb-06
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| Posted on Tuesday, February 20, 2007 - 09:32 pm: |
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Ok i meant box "designing" sorry for my horrible proofreading skills lol.
BTW i would be willing to pay a small sum of money for some nice optimized for my setup box plans with a cut sheet, etc.... |
Gold Member Username: Arande2
400dB could probably d...,
SouthWest Mi...
Too Many DBs...
Post Number: 1597
Registered: Dec-06
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| Posted on Tuesday, February 20, 2007 - 09:48 pm: |
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How you put your sub (down-firing, fron-firing) depends on if you like the shake more or just hearing it without the shake. I don't even know my preference yet. Nothing is wrong with slot porting to my knowledge. I'm considering infinite baffle (different in house than car) for my setup as it provides the benefits of being musical, having high efficiency (SPL), and not intruding into the room. Have you ever heard of this? |
Gold Member Username: Jan_b_vigne
Dallas,
TX
Post Number: 9818
Registered: May-04
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| Posted on Tuesday, February 20, 2007 - 11:52 pm: |
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Contact Parts Express. They sell the Dayton driver and can give you the information you require and will sell you a cabinet to use. |
Silver Member Username: Goose5714
Post Number: 499
Registered: Feb-06
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| Posted on Wednesday, February 21, 2007 - 09:19 am: |
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I see no reason to buy a cabinent when i can probalby make one (or 2 actually lol) from a 20 dollar sheet of mdf.
As far as infinite baffle goes..in car audio that usually means no box basically free air which never really optimizes anything. I want to here it most...the shake is a plus but not what i'm going for i guess.... |
Gold Member Username: Jan_b_vigne
Dallas,
TX
Post Number: 9823
Registered: May-04
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| Posted on Wednesday, February 21, 2007 - 12:33 pm: |
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If you can "probalby" make one, don't buy their cabinet. But call Parts Express, they sell the driver and they can tell you what you need to build. |
Silver Member Username: Gavdawg
Post Number: 292
Registered: Nov-06
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| Posted on Wednesday, February 21, 2007 - 01:05 pm: |
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"How you put your sub (down-firing, fron-firing) depends on if you like the shake more or just hearing it without the shake."
this is not true. It is all in preference. Some people feel that a down firing sub has better dispersal than a front firing sub. |
Gold Member Username: Jan_b_vigne
Dallas,
TX
Post Number: 9826
Registered: May-04
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| Posted on Wednesday, February 21, 2007 - 06:40 pm: |
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Guys, neither is "true". Not all drivers can be mounted in a downward firing position. It has to do with the suspension of the driver and not your user preference. |
Silver Member Username: Davidpa
Portland,
Oregon
US
Post Number: 393
Registered: Nov-05
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| Posted on Wednesday, February 21, 2007 - 09:07 pm: |
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Nor does one "shake" more than the other?
I get more and more free entertainment daily. |
Gold Member Username: Arande2
400dB could probably d...,
SouthWest Mi...
Too Many DBs...
Post Number: 1637
Registered: Dec-06
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| Posted on Thursday, February 22, 2007 - 03:35 am: |
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I mean interact with the floor, not SPL. Of course, if it's an IB, mounting it in a line array will most certainly shake your house. |
Silver Member Username: Gavdawg
Post Number: 294
Registered: Nov-06
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| Posted on Thursday, February 22, 2007 - 12:33 pm: |
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Jan, I know that the suspension of the driver has to do with it as well, but there are some people that feel that a downward firing driver has better dispersal, and couples with the room better.
IMHO, I have heard both well (and very poor) examples of both front and down firing designs.
Two of the MartinLogan subwoofers are designed so the user can mount the sub either in a floor firing or front firing configuration. |
Gold Member Username: Jan_b_vigne
Dallas,
TX
Post Number: 9833
Registered: May-04
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| Posted on Thursday, February 22, 2007 - 05:04 pm: |
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"Two of the MartinLogan subwoofers are designed so the user can mount the sub either in a floor firing or front firing configuration."
Does that make them bipolar? |
Silver Member Username: Stefanom
Vienna,
VA
United States
Post Number: 391
Registered: Apr-06
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| Posted on Thursday, February 22, 2007 - 05:12 pm: |
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They perhaps have a bit of an identity crisis, but they are not bipolar. |
Gold Member Username: Nuck
Post Number: 5976
Registered: Dec-04
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| Posted on Thursday, February 22, 2007 - 08:06 pm: |
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Ba-dump-bump.
Give him the hook. |
Gold Member Username: Nuck
Post Number: 5977
Registered: Dec-04
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| Posted on Thursday, February 22, 2007 - 08:14 pm: |
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Maybe it's just me.
The salesman for the woofer says that it can be mounted in any direction. This means that it has no use for phase, first of all.
It will work just as well with its concave reflective surface facing a cushioning space of air, as it will facing a counter-reacting force of exact energy.
Each of these arrangements can deliver the frequencies available through an extruded aluminum basket, when the rear of the speaker is pointed toward the outside.
Hifi. |
Gold Member Username: Jan_b_vigne
Dallas,
TX
Post Number: 9837
Registered: May-04
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| Posted on Friday, February 23, 2007 - 12:04 am: |
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I've never thought of the floor as a "counter-reacting force of exact energy". How can a passive device be a force of energy? |
Gold Member Username: Nuck
Post Number: 5984
Registered: Dec-04
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| Posted on Friday, February 23, 2007 - 06:15 am: |
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My mind drifted off to dual drives, for some reason. Never Mind. |
Gold Member Username: Jan_b_vigne
Dallas,
TX
Post Number: 9848
Registered: May-04
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| Posted on Friday, February 23, 2007 - 11:15 pm: |
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Where's Andre when you need him? Bet he got detention for not paying attention. |
Platinum Member Username: Project6
Post Number: 13099
Registered: Dec-03
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| Posted on Friday, February 23, 2007 - 11:53 pm: |
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He may have fried his brain conjuring up ways to destroy subwoofers. |
Gold Member Username: Nuck
Post Number: 6002
Registered: Dec-04
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| Posted on Saturday, February 24, 2007 - 07:46 am: |
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I just got out of detention. He was still there when I left. |
Gold Member Username: Arande2
400dB could probably d...,
SouthWest Mi...
Too Many DBs...
Post Number: 1646
Registered: Dec-06
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| Posted on Saturday, February 24, 2007 - 10:42 pm: |
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Lol. Actually what happened is our modem fried because the power supply went bad. It's up and running now. |
Bronze Member Username: Leonski
Post Number: 43
Registered: Jan-07
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| Posted on Thursday, March 08, 2007 - 01:41 am: |
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Josh,
Couple of things may help.
I have the printout of the advert of the MkIII in front of me. In the small print at the bottom they say 1.1ft3 sealed OR 2.8ft3 vented. There are tradeoffs in either choice...power handling and low freq rolloff are just 2.
There are several 'box' programs available. Some are free and others can run 100$ plus. You may want to try some of the freebie stuff first, to get an idea how the numbers (TS parameters of a driver) effect the final outcome.
As it turns out, I'm in a similar boat, trying to figure out how to get some real bass going in my system. My ancient Maggies give up around 50hz or so. I simply don't have room for a full-on HT setup, so I want a sub for music as well as the boom-boom stuff of movies.
Welcome to the DIY Zone. |
