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Hi, I currently have an MTX AMP powering a 10" RF. I also want to get 2 Alpine 12s. Can I do something like this?



and power it with a JBL 1200.1. Can a box like the one "shown" be done? Don't beat me up if it's a noob/stupid question, I'd just like to know if It's possible, and if so do I have to split the walls for each sub or what?

 
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You will get so much cancellation that you are better of going with just the 2 twelves, or even the one ten. Mix speakers don't mix, unless they are coving different frequency ranges. Better off using the 10 in the cabin covering mid bass, but I dunno if that 10 will handle that too well.

 
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in the cabin? where would you put it?

 
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I dunno, be creative Honestly, I would just run the two twelves and let the ten go.

 
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What if I do something like this:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3010683650&category=14 945

http://cgi.ebay.com/ws/eBayISAPI.dll...category=14945

but with the 10 in the middle?

 
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that one more sub will give you 3, maybe 6 dB tops more than the 2 twelves. but like fonto said, you will get some cancellation. so don't bother.

but if you insist, then yes divide each sub into a seperate chamber optimized for that particular sub.

 
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will it give cancelation even if I put them pointing to different sides?

 
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Its just a bad idea man ..... here is the thing.

Say the two 12's at max would give you 135db ....

Add in the 10" and that would potentially add in another 5db. So in THEORY you could get 140db.

Reality is that with cancellation you would maybe loose 4db anyway. Then add in the fact that when powering it all off one amp you can't control what speakers get what power. Now the max power is dependant on what the 10" can handle. I am sure the 10" will max out before the 12's so you have to tune it down so that you don't blow the 10". With tuning it down the 12"s might only max at 130db since they have less power.

So:
135db with the two 12's maxed
130db with two 12's tuned down, + 5db for the 10" maxed out, -3db for cancellation, and you have 132db

Its just easier and better to stick w/ the two 12's ..... just sell the other 10" to some local punk .....

 
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RegularJoe

 
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Like having a party when your parents aren't home ..... in theory it could all work but the odds of not getting caught are like one in a million. Theres always someone who will break something, spill something, etc.... burn the house down ...... lol

The setup could work actually .... but the chances are very very slim.

haha

 
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Put the 10" Behind the center console in the back seat. then tune the amp to put out mid base,

Would that fix the cancelation? I belive it should.

 
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what happened to my reply? I made one earlier....

alright, check it out, you can totally do this design and have it work. many many tell you different brands or sub sizes dont work. they do. properly setup, that is.

in my own car I have a 10" and 15's. how did I prevent canncellations? well, what IS cancellation?

when you have different sources of sound playing the same frequencies, you open up the opportunity for wave interferrence. basically, its a theoretical impossibility in a car, seeing as the size of teh waves are SO big, they will never reach a node in yoru car. true problems wth phasing in a car getting no output have more to do with wiring speakers in and out of phase, thats relaly true canncellation.

so why isnt it a good idea in all situations to run different size subwoofers? sound quality! you have one sub playing in one style, another in another style, ad mix em, your not gonna be happy with the way they sound! not when it comes time to listen to ultra hi-fi music.....

so how do we repair that? crossover work! 10's play a bandpass, 15's play a bandpass.
your component set is set to play 90 and up, your 10 is set ot play from 90 to 45 Hz, and the 15's to play 45 and below. NO worries abotu problems with sound concerning frequency response!

as to putting a 10 in that location, behind the center console, I had endless problems trying to get it working, i tried an 8. maybe downfiring could work, or plane loadig, but mine was fired directly up and i could not get it to work for the live of me. *shrug* if you cant get it to work, more power to ya.

as to mixing 10's and 12's, whats the point? they have basically the same response, its not something youd really wnana do anwyays. its like putting a 6.5 and a 5.25 in the same component set! you just wont see it!

the standard combinations are 10/15 and 8/12. and in each case, youll find teh 10's or 8's up front, to help with pointsource ideals of sound and the stage. (bass up front =D)

 
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i think this design would work, with the two 12's sharing air space, and the 10 having it's own air space, so it wouldn't have cancellation, and the 10 would be facing into the cabin of the car.... i'm no ICE guru, but after reviewing the posts and all, i think this will work, rabbit, mo, or ludlam, or some of the other's would be able to tell you more about it, but i designed this from what i read.... plus, it's your original design, modified a little.... sorry it's in mspaint....anyway, here it is... also, if you can gain 4 db, that's twice as loud as it was before...... this i know is true....



edit: also, i had left for a little while, but the window was still open, so i didn't know that rabbit had posted, so after reading his post, you could put a port on either one or both sides of the10, and it would be as he described....
and i think the reason he decided to do a 10 with 12's is because he already has the 10, not too sure though....

 
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already got a 10? wants to get 2 12's? sound slike someone needs a single 15..... ;D

 
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ummm I got 2 Infinity Reference Subs last night, but I didn't even hear them they were on sale for $80 (2 for $80). i thought that'd be a good price but now that you bring it up, maybe I'll return them and get a 15?? Will I be happier with a better 15? and my 10?

 
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Well ..... your jumping all over here .....

One problem I see is you are using a JBL1200.1 ....... I would think thats too much power for the speakers you just got.

The other problem I see is that w/ the setup w/ the 10" and the 15" you need to get 2 different amps, crossovers, etc.... to isolate each to its correct frequencies.

Personally I think you'll be way better off sticking with the two Alpine Type R's and the JBL 1200.1 ....... it will kick *** far better than that 10" ever thought of. Not even comparable ....

 
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joe, you dont need to give me advice, its aldini who wants it, thats MY friends trunk, i built his system, and i guarantee you, it DOES work and sound amazing [IMG]i/expressions/face-icon-small-smile.gif[/IMG]

as for advice to the person who was asking for it, aldini, are you shopping at frys? i know they are having sales like that for neat-o subwoofers...

if your insistant on keeping that 10, I would definitely take those back and get a single 15' youd love a 15" type R if your an alpine fan, ive only heard a tempest sound warmer [IMG]i/expressions/face-icon-small-smile.gif[/IMG]

if you are actually buyign from frys, they had a sale awhile back, comp VR's for $70 or 80 each, that trunk's brother now has a single 15 comp VR, and those woofers can get pretty loud too, for sure, at a very reasonble cost.

if you happen to really like yrou references, then you might want to keep those too! id consider taking out yrou 10" in that case, tho, you can sell it and make some of yrou money back [IMG]i/expressions/face-icon-small-wink.gif[/IMG]

 
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What Fry's do you shop at? The one at Woodland Hills doesn't carry Alpine... I think I might keep those references Fonto said for the price they are pretty good, unless you've heard otherwise? I still need to get a box for the 12s though, I haven't heard them, Il'l hook them up next weekend that way I'll still have a chance to return them.

 
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no, if you got them at frys, i was ognna say consider a single compVR, if you wanted alpine, youd have to go somewhere else, even if a place like frys did have alpine, they surely wouldnt carry type R.....

 
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Fry's sells Solo Barics, Comp VRs, Visioniks, and Audiobahns...but that is the best they have to offer, atleast at the small Fry by my house in Manhattan beach...the Solos are WAY expensive at Fry's. CC sells Type Rs, and usually they have a two for one special at times during the year. A CC by my house also has carried the 15" Type R. I am prolly gonna get flamed for this, but i prefered the reference subs over the Type Rs [IMG]i/expressions/face-icon-small-wink.gif[/IMG] IMO.

 
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lemme be the first to start the flaming, the typeR is as close as you can get to the tempest without being the thing in itself [IMG]i/expressions/face-icon-small-smile.gif[/IMG] very warm response, definitely a fan!

i cant believe you run shiva and dont liek the type R!

 
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[IMG]i/expressions/face-icon-small-tongue.gif[/IMG]

I didn't say that I did not like the type R, I just said that I prefered the Reference to the Type R (when I listen to 10s in CC)...I am not saying that the type R is a bad sub, in fact I was telling that guy that he needs to keep his Type R and not waste his money on buying new subs just to buy something (that other guy-Rookie). Anywayz, i will have to go listen again...maybe I got the Alpine's with the S on them confused with the one with the Rs on them Honestly too though, i have heard a few cars with Type Rs, but all did not have the best sounding installs...so I will have to save my judgement on them for now. What I was really trying to say is that the Reference subs sounded good to me in a Q-logic type 1 box...well worth 80 bucks for two (40 for one is an insane price to get them at an athorized retailer).

 
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What are pushing them with fonto?

 
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Currently they are being pushed against my wall in my living room [IMG]i/expressions/face-icon-small-tongue.gif[/IMG] I am running 4 Shiva, and my gurl is running two Infinty purfects