Hey,
When I finish my audio setup, I will be running two Alpine SWR-1242D subs and each will be ran my an Alpine MRD-M605 amp but they will be in their own box. Now, I have a new idea for an enclosure and I'm not gonna share so it'll be at least a little original but as it looks now, it'll be sealed.
First off.....
I can never find recommended box sizes for subs on the US Alpine site and so I get them off the Europe one and it says they recommend 24.1 Liters.
Well when I convert that (tell me if I did it wrong)...
24.1 liters times 61.024 (cubic inches in liter) divided by 1728 (cubic inches in a cubic foot)
I get basically .85 cubic feet. That seems really small.
I thought the R's were supposed to be ran at about 2 cubes.
So... which one is right??? I'm thinkin it's the 2 cubes
Secondly....
If I was to put these in my enclosure and wire them out of phase from each other would I just double the cubes or what...???
Also, what are the advantages/disadvatages to doing them out of phase in the same enclosure??? Like would it be louder/quieter than if I was to put them each in their own enclosure???
Any help would be appreciated.
Thanks.
-Seth
Well I guess I did my math right.
That just seems way to small but maybe not.
I have my one Type-S in about a 2.5 cube sealed and I love the way it sounds so it makes me think that I should be going bigger than the .85 but idk.
We'll see when other peeps chime in later today.
-Seth
Audiobahn Reccomends about 7 to 8cubed for 2 Flame Compression woofers.. Guess how that enclosure sounds ?
My Cav
I give up...
i'm buying a VW those people love trees, so they should love eachother too... "Andy"
Short Hand wrote:Audiobahn Reccomends about 7 to 8cubed for 2 Flame Compression woofers.. Guess how that enclosure sounds ?
I'm thinkin crap, but u got me confused.
Does anybody know about the out of phase wiring and box size???
-Seth
Why would you wire out of phase? wouldn't that make the subs cancel each other out?
if you wire them out of phase ... wont one cancel the other one out to a certain extent??
wysiwyg wrote:i would say they bang, they don't really pound so much. but if
you want to bump, then they will bump and hit real hard and a lot good. 
LOL
It's so when one goes in, the other sub goes out and visa versa but I didn't think it really cancelled at all.
IDK though.
Theres a bunch of smart audio peeps here but I don't think they answer a question unless it says RE or XXX in the title.
-Seth
Unless one sub is inverted in the box and then reversed polarity, I'm pretty sure they're gonna cancel out. As the one pushes outward, the other will suck inward and you won't really get a change in pressure in front of the subs. I don't know if the fact that they're sharing the same air space makes any difference or not, but in my mind that seems more harmful than if they're each in their own enclosure.
Replica48 wrote:Unless one sub is inverted in the box and then reversed polarity, I'm pretty sure they're gonna cancel out. As the one pushes outward, the other will suck inward and you won't really get a change in pressure in front of the subs. I don't know if the fact that they're sharing the same air space makes any difference or not, but in my mind that seems more harmful than if they're each in their own enclosure.
Right, You're trying to build up pressure. When you have the subs firing in opposite directions like that, you're loosing pressure.
i ran 2 type r's in my cav and the box i made was 34.75" width x15.5" height x 15" deep and the subs were in their own chambers and ported, the port size was 1.75"wide 14" high and 21" long, dont know if that helps you but i did a 142.5db with that style of box
what exactly are you thinking of doing here??
are you planning on inverting both subs, or just one, or neither. what gave you the idea to hook anything up out of phase to begin with?
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wysiwyg wrote:what exactly are you thinking of doing here??
are you planning on inverting both subs, or just one, or neither. what gave you the idea to hook anything up out of phase to begin with?
Well I remember seeing that done and it was supposed to be a way to wire um up.
And I was thinking about how inverted is coming up and I remember that the thing I was thinking of was with one inverted and thats why he wired it out of phase. But I still remember somewhere seeing that with one out of phase and firing the same was a way to wire it up.
Anyways, I'll stick to having them fire the same and wired the same.
Thanks you guys.
-Seth
maybe you were thinking about isobaric or w/e when ones out of phase but then again its inverted i believe, i dont really know how that isobaric loading works, nor do i care to find out
wysiwyg wrote:i would say they bang, they don't really pound so much. but if
you want to bump, then they will bump and hit real hard and a lot good.
LOL
wizkiddrummer wrote:wysiwyg wrote:what exactly are you thinking of doing here??
are you planning on inverting both subs, or just one, or neither. what gave you the idea to hook anything up out of phase to begin with?
Well I remember seeing that done and it was supposed to be a way to wire um up.
And I was thinking about how inverted is coming up and I remember that the thing I was thinking of was with one inverted and thats why he wired it out of phase. But I still remember somewhere seeing that with one out of phase and firing the same was a way to wire it up.
Anyways, I'll stick to having them fire the same and wired the same.
Thanks you guys.
-Seth
The only time you need to wire them out of phase is if only one of the two is inverted.
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Offical dealer for the following-
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DB LINK
DB DRIVE
PANASONIC
GARMIN
ROSEN
SCOSCHE
XE DESIGNS
SOUNDGATE
PAC
LITEGLOW
Ya, I see now why and such.
-Seth
Seth. just to let you know. seing as i know your plan. you cant wire them inverted or the WILL cancel out. and i have an idea for it to so hit me up later tonite on MSN to hear about it.
