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alpine type r 12’s

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=93031
Printed Date: May 01, 2024 at 12:27 AM


Topic: alpine type r 12’s

Posted By: alpine dude
Subject: alpine type r 12’s
Date Posted: April 09, 2007 at 10:54 PM

hey im new here been surfin here for a while now i wanna ask . got lots of info but didint find one thing. I have a alpine type r 12 with a mrd 605,with a 1.75 ported to about 32 hz . now i bought another type r and wanna put them in a ported box thing is do i realy need that box can i have them in a regular ported box. thanks much p.s. im going to put another 605 to it.



Replies:

Posted By: stevdart
Date Posted: April 09, 2007 at 11:02 PM
What's that mean, a "regular ported box"?

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: alpine dude
Date Posted: April 09, 2007 at 11:06 PM
like insted of a box built to its specs like the one i have is. can i put them in a regular ported box. With like lets say a slot in the center of the box




Posted By: stevdart
Date Posted: April 09, 2007 at 11:28 PM

Problem with a premade vented box is that the tuning freq and size is most likely not optimum for your subs.  The type r should be tuned pretty low...I would tune in the 20's...and the box size on the large side.  Finding a premade box like that, I don't know.  I'll bet the box you have your eye on is tuned to 40 Hz and gives each sub 1.25 cu ft.  About right?  I would need to look at the specific Type R model a little closer, but my bet is for 2 or 2+ cu ft per sub with box tuning at mid-20's. 

I don't like the idea of buying a premade vented box.  But, sure, it could be done if it's a good match for the subs in question.  The subs can share the same vent...they don't each have to have their own.



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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: alpine dude
Date Posted: April 10, 2007 at 9:00 AM
would it be a good idea to put two type r 12's into a premade ported box. both are going to have a mrd 605 running them. thing is ihave a 1.75 ported bot with one tuned to 32hz will i hear a differance in a pre made ported box or even hurt them?




Posted By: jmelton86
Date Posted: April 10, 2007 at 9:13 PM
You're going to hear a difference in any box design. Your best bet would be to not even consider a pre-fab and build one yourself according to Alpines' recommended specs for that specific sub. This way, unless you build a couple trial-and-error boxes first, you know they'll be performing at nearly max efficiency. Good Luck!

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2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001




Posted By: alpine dude
Date Posted: April 12, 2007 at 11:09 PM
would like to run both of my alpine mrd-605 amps to two type r woofers. i have a 4 to 8 gauge distrabution block and some 4 foot rca's to hook amp to amp how about the remote run from one amp to other they are gonna be next to each other . Am i missing anything replys apprechated




Posted By: jmelton86
Date Posted: April 13, 2007 at 12:32 AM

That's fine. Get 2Ohm woofers (if you plan on having one on each amp) to get max output from amps. Your remote wire idea seems fine. Just don't use it on more than say 3 things or it'll stop working (from having to power-up too many things). You'll need to do the Big3 Upgrade to supply enough power to the amps.

What kind of vehicle, HU, etc...?



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2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001




Posted By: coppellstereo
Date Posted: April 13, 2007 at 1:31 AM
the remote wire idea is perfectly fine. how much power do these amps make at the impedance of the woofer? While the 'big 3' upgrade will help, it isnt mandatory.
Are these woofers in a common chamber?

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Posted By: alpine dude
Date Posted: April 14, 2007 at 9:27 AM
newer kenwood head and a ported box oh yeah its a 1999 acura cl coupe




Posted By: alpine dude
Date Posted: April 14, 2007 at 9:28 AM
forgot to ask do i need the alpine link cable?




Posted By: alpine dude
Date Posted: April 16, 2007 at 10:27 PM
i went from one type r alpine  12 4 ohm woofer. To  two in a sealed  box what should my hz's  be changed. also the db and gain both amps are alpine mrd 605's im almost done help would be the touch.




Posted By: aznboi3644
Date Posted: April 16, 2007 at 11:54 PM
hzs??? you mean crossover??

usually between 80-100Hz





Posted By: alpine dude
Date Posted: April 18, 2007 at 12:12 AM
i hace a 1999 acura cl i had i type r 12 in a ported box about 1.75 cf 33 hz with a mrd 605 . now i got another box its sealed dosent hit as hard in this box the point is i want a box to specs because it sounded clean can i fit this box in the car ? im running two mrd 605's both subs 4 ohm     help would be apprechiated.




Posted By: alpine dude
Date Posted: April 18, 2007 at 9:42 AM
can i wire my two 4 ohm type r12's to the mrd-1005




Posted By: alpine dude
Date Posted: April 18, 2007 at 2:13 PM
two alpine typr 12's 4ohm to two mrd 605 amps or wired to one mrd 1005 if so the 1005 how wouldi go about pushing both would they be under powered? advice would be great thanks




Posted By: rumtech
Date Posted: April 18, 2007 at 2:18 PM
The mrdm 1005 is not 1 OHM stable so thats not an option. the twin 605 is a good match




Posted By: alpine dude
Date Posted: April 18, 2007 at 2:32 PM
see i had one now i bought another one and do you think it will hit harder with both amps and do i also need the amplink cable




Posted By: aznboi3644
Date Posted: April 18, 2007 at 10:23 PM
amp link cable is not needed




Posted By: upzaw2000
Date Posted: April 19, 2007 at 7:36 AM
its not needed because you are just going to run rca's line out. thats correct right, the reason i am interested is because i was running a m605 to 2 alpine type e's and my e's got blown big time!!! my car was running at 15.7 volts. they may have had somthing to do with it. anyways i dont wanna get rid of m605, so i just bought 2 alpine type r's at 2 ohms, they will be in today so i was thinking about getting another 605.





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